电源管理

Power Management

New Products Review

电源管理新产品回顾

2008年第二季度

电源管理新产品回顾

目录

源自德州仪器的电源管理产品Array TI 提供了大量的高性能电源管理产品组合，其范围从标准线性稳压器至

嵌入式及集成的电源解决方案。结合高级应用知识、广阔的区域技术支

持及易于使用的设计工具，TI 可帮助您成就与众不同的设计并快速的占

领市场。

德州仪器 2008年第二季度电源管理新产品回顾

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review Power Supply Control

UCC28060Natural Interleaving?Dual-Phase Transition-Mode PFC Controller 3

?

5

4

3

2

170

120

220270

170

C a p a c i t o r R i p p l e C u r r e n t (A )

Input Voltage (V)

Typical Application Circuit

Ripple Current Reduction

Description

Optimized for high-volume consumer applications,this solution extends the advantages of transition mode—high efficiency with low-cost components—to higher power ratings than previously possible.By utilizing a Natural Interleaving technique,both channels operate as masters (that is,there is no slave channel)synchronized to the same frequency.This approach delivers inherently strong matching,faster responses,and ensures that each channel operates in transition

plete system-level protection features input brownout,output over-voltage,open-loop,overload,soft-start,phase-fail detection,and thermal shutdown.The additional FailSafe over-voltage protection (OVP)feature protects against shorts to an intermediate voltage that,if undetected,could lead to catastrophic device failure.

Natural Interleaving Features ?Easy phase management facilitates compliance to light-load

efficient standards ?FailSafe OVP with dual paths prevents output over-voltage conditions caused by voltage-sensing failures

?Sensorless current shaping simplifies board layout and improves efficiency

?Inrush safe current limiting:

?Prevents MOSFET conduction during inrush

?Eliminates reverse recovery events in output rectifiers

System Features ?Cost savings

? Improved efficiency and design flexibility over traditional,

single-phase continuous conduction mode (CCM)

? Input filter and output capacitor current cancellation:

?Reduced current ripple for higher system reliability and smaller bulk capacitor

?Reduced EMI filter size

? Enables use of low-cost diodes without extensive snubber circuitry ? Improved light-load efficiency

? Improved transient response ? Complete system-level protection

? 1-A source/1.8-A sink gate drivers

? Operating temperature range: –40° C to +125° C in an SOIC 16-pin package Applications

?100-W to 800-W power supplies ? LCD, plasma, and DLP ?TVs

? Computer power supplies ? Entry level servers ? Electronic lighting ballasts

电源控制UCC28060 自然交错双相位转换模式PFC 控制器

概述

该解决方案针对大体积消费应用进行了优化，扩展了转换模式的优势——采用低功耗元件实现了高效率，较之以往尽可能的提高了额定功率。由于采用了自然交错(Natural Interleaving)

技术，两条通道均作为主通道运转（换言之，没有从通道）并同步至相同的频率。该方法实现了固有的强健匹配及更快速响应特性，并确保了每个通道均以转换模式运转。完备的系统级保护特性包括了输入掉电、输出过电压、开路、过载、软启动、相位失效检测以及热关断。附加的过电压失效保护(OVP)特性针对短接至中间电压进行保护，避免了灾难性的器件毁坏。自然交错(Natural Interleaving)特性

简单的相位管理有助于遵从轻负载效率标准双路过电压失效保护(OVP)

避免了因电压感应失效而引起的输出过电压状态无传感器电流整形(current shaping)

简化了板载布线并改善了效率

浪涌(inrush)安全电流限：防止浪涌期间 MOSFET 导通

消除了输出整流器的反相恢复事件

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○

○

系统特点

节约成本

与传统的单相位连续传到模式(CCM)相比，改善了效率及设计灵活性输入滤波器及输出电容电流消除：

降低电流纹波以实现更高的系统可靠性，并支持使用更小容量的电容降低抗电磁干扰滤波器的尺寸可支持使用低成本的二极管，无须庞大的缓冲电路改善轻负载效率改善瞬态响应完备的系统级保护

1A 馈送/ 1.8A 吸收门驱动器

工作温度范围：–40° C 至 +125° C （采用 SOIC 16引脚封装）

应用

100W 至 800W 电源供电液晶、等离子及 DLP ? 电视

计算机电源入门级服务器

电子照明镇流器(ballast)???○○

??????????

?典型应用电路

纹波电流降低

德州仪器 2008年第二季度

电源管理新产品回顾

Power Management New Products Review

Texas Instruments 2Q 2008

V IN

Typical Application Diagram

Description

The UCC28070 is an advanced power factor correction device that

integrates two pulse-width modulators (PWMs) operating 180° out of phase. This Natural Interleaving? PWM operation generates

substantial reduction in the input and output ripple currents, and

the conducted-EMI filtering becomes easier and less expensive.

A significantly improved multiplier design provides a shared current reference to two independent current amplifiers that ensures matched average current mode control in both PWM outputs while maintaining a stable, low-distortion sinusoidal input line current.

The UCC28070 contains multiple innovations including current

synthesis and quantized voltage feed-forward to promote performance enhancements in PF, efficiency, THD, and transient response.

Features including frequency dithering, clock synchronization, and slew rate enhancement further expand the potential performance enhancements.

The UCC28070 also contains a variety of protection features including output over-voltage detection, programmable peak-current limit, in-rush current detection, under-voltage lockout, and open-loop protection.

Features

? Interleaved average current-mode PWM control with inherent

current matching ? Advanced current synthesizer current sensing for superior efficiency and PF

? Highly-linear multiplier output with internal quantized voltage feed-forward correction for near-unity PF ? Programmable frequency (up to 300 kHz) ? Programmable maximum duty-cycle clamp ? Programmable frequency dithering rate and magnitude for enhanced EMI reduction ? Magnitude: up to 30 kHz ? Rate: up to 30 kHz ? External clock synchronization capability

? Enhanced load and line transient response through voltage amplifier output slew-rate correction ? Programmable peak current limiting

? Bias-supply UVLO, over-voltage protection, open-loop detection and PFC-enable monitoring ? External PFC-disable interface Applications

? High-efficiency server and desktop power supplies ? Telecom rectifiers

UCC28070 双相交错 CCM PFC 控制器

概述

UCC28070 是一款高级的功率因数修正器件，集成了可180°倒相运转的双相脉宽调制器(PWM)。该自然交错(Natural Interleaving?)的脉宽调制器切实的降低了输入及输出的纹波电流，并降低了对导通电磁干扰(conducted-EMI)滤波器的需求，使其更为简易且廉价。进行了重点改良的乘法器设计为两个独立的电流放大器提供了共享的电流基准，确保了两个 PWM 输出端相匹配的平均电流模式控制，同时保持了稳定的、低失真的正弦输入线路电流。

UCC28070包含了若干项创新，包括了电流合成(synthesis)及量化电压前馈，以实现功率因数、效率、总谐波失真(THD)及瞬态响应性能上的增强。频率抖动、时钟合成以及转换速率特性的增强还更进一步的增进了潜在性能的强化。UCC28070包括了不同的保护特性，包括输出过电压检测、可编程峰值电

流限、浪涌电流检测、欠压锁定以及开路保护。

特点

交错平均电流模式脉宽调制控制，蕴含了固有的电流匹配性能高级电流合成器电流感应，以实现更高的效率及功率因数高度线性化的乘法器输出，蕴含了固有的量化电压前馈修正，以实现近乎一致(near-unity)的功率因数

可编程频率（高达 300 kHz ）

可编程最大责任周期钳位可编程频率抖动速度及幅度，以实现电磁干扰抑制的增强幅度：高达 30 kHz 速率：高达 30 kHz 具有外部时钟同步能力通过电压放大器输出转换速率修正强化负载及线路的瞬变响应性能可编程峰值电流限偏压电源欠压锁定(UVLO)、过电压保护、开路检测及 PFC 使能检测外部 PFC 失效接口应用高效率服务器及笔记本电源电信整流?

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典型应用框图

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review

VOUT1 = 7 V to 12 V

400 W

VIN = –48 V (–36 V to –60 V)

Intermediate Bus Converter Application

controllers are optimized for use in high efficiency, high power density, unregulated intermediate bus converters. Topologies for the devices include push-pull, half-bridge and full-bridge. Low cost,

small size, and highly efficient solutions are provided by innovations like start-up frequency control and load dependent off-time control set by the user.

?Frequency controlled startup allows small output inductor, low ripple and constant current start with large output capacitor ?Two 0.2-A push-pull outputs provide matched control signals D to external drivers

?Two additional 1-D outputs for optimal use of self-driven or

control-driven synchronous rectifiers ?Unregulated, fixed-volt-second or fixed-frequency modes set by user Applications ?Intermediate bus isolated converters ?DC to DC transformers

的非稳压中间总线转换器进行了优化。此类器件的拓扑包括了推挽(push-pull)、半桥及全桥。其创新（包括了启动频率控制及取决于负载的截止时

间[off-time]控制，均可由用户自设定）成就了低成本、小尺寸及高效率

的解决方案。

频率受控的启动，允许以小输出电感带大输出电容实现低纹波及恒定电流的启动两个 0.2A 推挽输出端，可为外部驱动器提供匹配的控制信号 D 两个附加的 1 D 输出，以实现自驱动或控制驱动同步整流器的最优化使用非稳压、固定伏秒或固定频率模式，由用户自设定应用

中间总线隔离转换器DC/DC 变压器?????

?

中间总线转换器应用

德州仪器 2008年第二季度

电源管理新产品回顾

Power Management New Products Review

Texas Instruments 2Q 2008

Input

Fault Signal Control Signal

R USB Port

Typical Application

intended for applications where heavy capacitive loads and short-circuits are likely to be encountered, incorporating a 100-m ? ,

N-channel MOSFET in a single package. The current-limit trip point is user adjustable between 100 mA and 1.1 A via an external resistor.The power-switch rise and fall times are controlled to minimize current surges during switching.When the output load exceeds the current-limit threshold or a short is present, the device limits the output current to a safe level by switching into a constant-current mode, pulling the over-current FAULT\ logic output low. Additionally, an internal reverse-voltage detection comparator disables the power-switch in the event that the output voltage is driven higher than the input to protect devices on the input side of the switch.

? Adjustable current-limit, 100 mA to 1100 mA ? Fast over-current response: 2 μS typical ? 100-m ?high-side MOSFET ? Reverse voltage protection ? Operating range: 2.5 V to 6.5 V ? Undervoltage lockout

? Deglitched fault report ? 2-μA maximum standby supply current ? Ambient temperature range: –40° C to 85° C Applications ?Cell phones

? Laptops

? Heavy capacitive loads ? Short-circuit protection

? Reverse voltage protection

的应用，该器件在其单片封装内整合了100 m Ω 的N 道沟 MOSFET 。用户可通过外部电阻调节电流限告警启动点(trip point)，调节范围介于 100

mA 至 1.1 A 之间。功率开关开启及截断的时间均受到了控制，以实现切换期间的电流浪涌最小化。当输出负载超过电流限或出现短路状况之时，器件将切换至恒定电流模式，下拉过电流故障逻辑端(FAULT\ logic)输出至低电平，从而限制输出电流至一个安全的幅值。此外，当所驱动的输出电压高于输入电压时，事件触发将通过内置的反相电压检测比较器使功率开关失效，以保护开关输入侧的器件。

可调节电流限：100 mA 至 1100 mA

快速过电流响应： 2 μS （典型值）100m Ω 高侧 MOSFET 反相电压保护

工作电压范围：2.5 V 至 6.5 V

欠压锁定

抗尖刺脉冲(teglitched)错误报告

2μA 最大待机电源电流

环境温度范围：–40° C 至 85° C

应用

蜂窝电话膝上型电脑大容性负载短路保护反相电压保护????

??????????典型应用

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review

TPS2358 Application Diagram

controllers designed to perform all necessary power interface func-tions for an Advanced Mezzanine Card (AMC) whether in an ATCA carrier board or in a microTCA power module. Fully integrated 3.3-V channels provide inrush, overcurrent, and FET ORing. The same

functions are provided for the 12-V channels using external FETs and sense resistors. The 12-V current limits are set via external sense

resistors, but the 3.3-V current limits are factory set to AMC compliant

levels. The accurate current sense comparators of the TPS2358/59enable it to satisfy the tight ATCA AMC current limit requirements.

? Full control for two AMC modules ? Independent current limit and fast trip ? 3.3-V and 12-V FET ORing for microTCA ? Internal FETs for 3.3-V current limit and ORing

? Power Good and fault outputs

? 48-pin QFN package (TPS2358) ? 36-pin QFN package with I 2C (TPS2359)Applications ?microTCA power modules ?ATCA carrier boards ?Blade server hot-swap function

?Telecom networks

电信计算架构）载波板或 microTCA （微型电信计算架构）功率模块上的高级夹层卡（AMC ）所需的全部电源接口功能。全集成的 3.3 V 通道

提供了浪涌电流、过电流保护及 FET ORing 控制功能。采用外部 FET 及

感应电阻的 12 V 通道也具有同样的功能。12 V 通道的电流限通过外部感应电阻设定，但 3.3 V 电流限则是在出厂前设定至 AMC 兼容电平。TPS2358/59 的精确电流感应比较器使其可满足 ATCA AMC 电流限的严苛需求。

可完全控制两个 AMC 模块 Full control for two AMC modules 独立的电流限及快速跳变值(fast trip) 用于 microTCA 的 3.3V 及 12 V FET ORing 内置 FET 以实现 3.3V 通道电流限及 ORing 供电良好及故障输出48 引脚 QFN 封装 (TPS2358)

带 I 2C 接口的 36 引脚 QFN 封装(TPS2359)用于

microTCA 电源模块ATCA 载波板刀片服务器(Blade server)热插拔功能

电信网络?????????

??TPS2358 应用框图

德州仪器 2008年第二季度

电源管理新产品回顾

Power Management New Products Review Texas Instruments 2Q 2008

From Spare Pairs or Transformers

From Etherent Transformers

Basic TPS23753 Implementation

(PoE) powered device (PD) interface and DC/DC control that is specifi-cally optimized for isolated converter designs. The PoE implementation supports the IEEE 802.3-2005 standard, 13-W PD. The TPS23753 features a hiccup startup mechanism with an internal, switched current source. This permits the advantages of cycling overload fault protection without the constant loss of a pullup resistor.

The TPS23753 supports a number of input voltage ORing options including natural high voltage, external adapter preference, and PoE preference. The programmable oscillator may be synchronized to a higher-frequency external timing reference. The PoE interface features an external detection signature pin that can also be used to disable the internal hot-swap MOSFET. This allows the PoE function to be turned off. Classification can be programmed to any of the defined types with a single resistor.

? Complete PoE interface ? Adapter ORing support

? Programmable frequency with synchronization ? Simplified DC/DC control ? Current and inrush limit ? 100-V ratings

? –40° C to 125° C junction temperature range ? Thermal protection Applications ?IEEE 802.3-2005 compliant powered devices ? VoIP telephones ? Access points ? Security cameras

802.3-2005 标准，13W PD 。TPS23753采用颇具特色的 hiccup （“打

嗝”模式）启动机制，具有内置的开关电流源，该特点具有周期性过载失效保护的优势，消除了上拉电阻的固有损失。TPS23753 支持一系列的输入电压 ORing 选项，包括了自然高电压(natural high voltage)、外部适配器基准以及以太网供电优先。可编程的

振荡器可同步至更高频率的外部基准时钟。PoE 接口具有外部检测信号

引脚，同样可用于关闭内部热插拔 MOSFET ，从而实现 PoE 功能的关闭。分级(Classification)操作可采用一个独立的电阻，通过编程设定至任意以定义的类型。适配器 ORing 支持

带同步功能的可编程频率简化的 DC/DC 控制电流及浪涌

(inrush)

限制

100V 额定

–40° C 至 125° C 结点温度范围

过热保护

应用

IEEE 802.3-2005 兼容型受电设备

网络(VoIP)电话

接入点安保摄像头???????????TPS23753的基础实现

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review V OUT

Simplified Application Diagram

100 kHz to 600 kHz. Flexible features found on this device include selectable soft-start time, programmable short circuit limit, program-mable undervoltage lockout (UVLO) and synchronization capability. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Short-circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on,and comparing it with a user programmable threshold.

? Internal 5-V regulator ? High and low MOSFET sense overcurrent ? Enable and Power Good ? Programmable UVLO and hysteresis ? Thermal shutdown at 150° C ? Selectable soft-start ? Pre-bias output safe Applications

?Digital TV

? Entry-level and mid-range servers ? Networking equipment ? Non-isolated DC/DC modules

式控制。该器件灵活的特性还包括了可选择的软启动时间、可编程短路限、可编程低电压锁定(UVLO)及同步能力。自适应的防跨导(anti-cross conduction)配置用于抑制供电 FET 上的急速穿过的大电流。通过感应低侧 MOSFET 导通时的电压降，并与用户编程设定的阈值比较，还可实现短路检测。

180° 双向倒相同步

内置 5 V 稳压器

高侧及低侧 MOSFET 感应过电流使能及供电良好可编程欠压锁定及磁滞作用(hysteresis)热关断温度：150° C 可选择的软启动预偏压输出保障

应用

数字电视入门级及中档服务器

网络设备

非隔离型 DC/DC 模块

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????????简明应用框图

德州仪器 2008年第二季度

电源管理新产品回顾

Power Management New Products Review Texas Instruments 2Q 2008TPS40192/93, 4.5-V to 18-V Input 10-Pin Synchronous Buck Controller with Power Good ?

ON/OFF

V OUT

V Simplified Application Diagram Description TPS40192 and TPS40193 are cost-optimized synchronous buck

controllers that operate from 4.5-V to 18-V input. These controllers implement a voltage-mode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193).The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact power-supply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs.

Features

?Input operating voltage range: 4.5 V to 18 V ? Up to 20-A output currents

? Supports pre-biased outputs ? 0.5% 0.591-V reference ? Three selectable thermally compensated short-circuit protection levels ? Hiccup restart from faults ? Internal 5-V regulator ? High- and low-side FET RDS ON current sensing

? 10-pin 3 mm x 3 mm SON package ? Internal 4-ms soft-start time ? Thermal shutdown protection at 145° C Applications ?Cable modem CPE ? Digital set-top box

? Graphics/audio cards

? Entry-level and mid-range servers

TPS40192/93,

具有供电良好指示的4.5V 至 18V 输入 10 引脚同步降压控制器概述

TPS40192 及 TPS40193 是成本优化型(cost-optimized)同步降压控制器，4.5V 至 18V 输入运转。此类控制器的实现采用了电压模式控制架构，固定的开关频率分别为600 kHz (TPS40192) 及 300 kHz (TPS40193)。更高的开关频率有利于使用较小的电感及输出电容，从而给出更紧凑的解决方案。自适应的防跨导(anti-cross conduction)配置用于抑制供电 FET 上的急速穿过的大电流。

特点

输入工作电压范围： 4.5 V 至 18 V

输出电流可高达 20 A 支持预偏压输出

0.591V 基准，误差为 0.5%

三个可选择的热补偿短路保护电平失效后“打嗝”(hiccup)重启动内置 5V 稳压器

高侧及低侧 FET 通态电流(RDSON current)感应10 引脚 3 mm x 3 mm SON 封装内置 4ms 软启动延时过热关断保护限：145° C 应用缆线连接调制解调型用户终端设备数字机顶盒

图形/音频卡

入门级及中档的服务器

???????????????简明应用框图

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review TPS40210/11 4.5-V to 52-V Input Current Mode Boost Controller ?

V (4.5 V to 52 V), non-synchronous boost controllers. They are suitable for topologies which require a grounded source N-channel FET including boost, flyback, SEPIC and various LED Driver applications.The device features include programmable soft start, overcurrent protection with automatic retry and programmable oscillator

frequency. Current mode control provides improved transient response and simplified loop compensation. The main difference between the two parts is the reference voltage to which the error amplifier regulates the FB pin. Features ?Suitable for boost, flyback, SEPIC, and LED driver topologies

? Wide input operating voltage: 4.5 V to 52 V ? Adjustable oscillator frequency

? Fixed frequency current mode control ? Internal slope compensation ? Integrated low-side driver ? Programmable closed loop Soft Start ? Overcurrent protection

? 700-mV reference (2% overtemperature) ? Low current disable function

Applications

?LED Lighting

? Industrial control systems ? Battery powered systems

TPS40210/11，4.5V 至 52V 输入电流模式增压控制器

TPS40210 及 TPS40211 是宽输入电压范围（4.5V 至 52V ）、非同步增压控制器，适用于需要 N 道沟 FET 源级接地的拓扑，包括了增压、反激(flyback)、SEPIC 及多种 LED 驱动器应用。此类器件的特点包括了可编程软启动、带自动重试的过电流保护以及可编程振荡器频率。电流模式控制改善了瞬态响应并简化了回路补偿。正两个器件的主要区别在于基准电压，可使用误差放大器通过 FB 引脚进行调节。

特点

适用于增压、反激、SEPIC 以及 LED 驱动器拓扑宽输入工作电压范围： 4.5 V 至 52 V 可调节振荡器频率

固定频率电流模式控制内置斜率(slope)补偿集成低侧驱动器可编程闭环软启动过电流保护700mV 基准（温度漂移误差最大为 2%）低电流失效功能

应用LED 照明工业控制系统电池供电系统

?????

?

???????

德州仪器 2008年第二季度

电源管理新产品回顾

1

Power Management New Products Review Texas Instruments 2Q 200812SWIFT? Converters V Simplified Application Diagram

Description

TPS54283/86 and TPS54383/86 are dual output non-synchronous buck converters capable of supporting 2-A output

applications that operate from a 4.5-V to 28-V input supply voltage,

and require output voltages between 0.8 V and 90% of the input voltage.

With internally-determined operating frequency, soft start time, and control loop compensation, these converters provide many features with a minimum of external components. Channel 1 overcurrent

protection is set at 3 A, while Channel 2 overcurrent protection level is selected by connecting a pin to ground, to BP , or left floating. The setting levels are used to allow for scaling of external components for applications not needing the full load capability of both outputs.

The outputs may be enabled independently, or may be configured to allow either ratiometric or sequential startup sequencing. Additionally,

the two outputs may also be powered from different sources.

Features

?4.5-V to 28-V input range

? Output voltage range 0.8 V to 90% of input voltage ? Output current up to 2 A

? Two fixed switching frequency versions: ?TPS54283: 300 kHz ?TPS54286: 600 kHz ? Two selectable levels of overcurrent protection (output 2)

? 0.8-V 1.5% voltage reference ? 2.1-ms internal soft-start ? Dual PWM outputs 180° out-of-phase ? Ratiometric or sequential startup modes selectable by a single pin ? 100-m ?internal high-side MOSFETs ? Current mode control ? Internal compensation ? Pulse-by-pulse overcurrent protection ? Thermal shutdown protection at 148°C

? 14-pin PowerPAD? HTSSOP package Applications

?Set-top box ? Digital TV ? Power for DSP ? Consumer electronics

SWIFT?

转换器及 T PS54383/86, 2A 非同步转换器侧MOSFET

TPS54283/86 TPS54383/86 是双路输出非同步降压转换器，可支持 2A 输出应用，输入工作电源电压范围为4.5V 至 28V ，输出范围介于 0.8V 与输入电压值的 90% 之间。此类转换器的工作频率、软启动时间以及控制回路补偿均由内部确定，

以最少的外部元件数量实现了诸多特性。通道 1 过电流保护设定为 3A ，同时，通道 2 的过电流保护电平则具有可选择性，可通过引脚连接至地、至 BP 或空置(left ?oating)。当应用无须两个输出全负载运转时，电平值的设定将用于允许外部元件值的调节。输出可独立的使能，也可配置为比例转换(ratiometric)或顺序启动次序(sequential startup sequencing)。此外，两个输出还可采用不同的电源供

电。

特点

4.5V 至 28V 输入范围输入电压范围：0.8 V 至输入电压值的 90%

输出电流可高达 2 A

两个固定转换频率版本：TPS54283：300 kHz TPS54286：600 kHz

两个可选择的过电流保护电平（输出2）

0.8V 电压基准（最大误差1.5%）2.1ms 内部软启动

双路 PWM 输出 180° 倒相比例转换或顺序启动次序，可通过单个引脚进行选择100m Ω 内置高侧 MOSFET 电流模式控制内置补偿逐脉冲(Pulse-by-pulse)过电流保护

热关断保护：148°C

14 引脚 PowerPAD? HTSSOP 封装

应用

机顶盒

数字电视DSP 供电消费电子产品????○

○

????

?

??????????

简明应用框图

德州仪器 2008年第二季度

1

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review Computing Power

TPS51220, Fixed-Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power 13?

Typical Application Circuit

Description

The TPS51220 is a dual synchronous buck regulator controller with

two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete a 2-cell to 4-cell notebook

system power supply. The TPS51220 supports high efficiency, fast transient response and 99% duty cycle operation. It supports supply input voltages ranging from 4.5 V to 28 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP? mode supports fast transient response. The high duty (99%) operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1 MHz by a resistor, and each channel runs 180° out of phase. The TPS51220 can also synchro-nize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220 is available in the 32-pin 5 x 5 QFN package and is specified from –40° C to 85° C.

Features ?Input voltage range: 4.5 V to 28 V

? Output voltage range: 1 V to 12 V

? Selectable light load operation (continuous/auto skip/

Out-of-Audio? mode)

? Programmable droop compensation

? Voltage servo adjustable soft start ? 200-kHz to 1-MHz fixed frequency PWM ? Selectable current/D-CAP mode architecture ? 180° phase shift between channels ? Resistor or inductor DCR current sensing

? Power Good output for each channel ? OCL/OVP/UVP/UVLO protections (OVP disable option) ? Thermal shutdown (non-latch)

? Output discharge function (disable option) ? Integrated boot strap MOSFET switch

? QFN32 (RHB) Applications ?Notebook computer system and I/O bus ?Point of load in LCD TV, MFP

计算电源TPS51220, 固定频率、99% 责任周期峰值电流模式笔记本系统电源

概述

TPS51220 是带两个 LDO 的双路同步降压稳压器控制器。该器件针对 5V/3.3V 系统控制器进行了优化，可支持设计人员实现经济高效的 2 电池至 4 电池笔记本电源设计。TPS51220支持高效率、快速瞬态响应以及 99% 的责任周期运转。该器件所支持的输入电源电压范围为 4.5V 至 28V ，输出电压为 1V 至 12V 。两类控制配置可供选择，取决于应用。峰值电流模式可支持采用较低的 ESR 电容及低输出精度实现稳定的运转。D-CAP? 模式支持快速瞬态响应。大责任周期(99%)运转及宽输入/输出电压范围可支持灵活的设计，如小型移动PC 及多种多样的其他应用。定值频率可通过电阻实现从 200kHz 至 1MHz 的调节，并且每个通道均可 180° 倒相运转。TPS51220 还可同步至外部时钟，交错比率(interleaving ratio)

可通过其负荷(duty)进行调节。TPS51220 采用32-pin 5 x 5 QFN 封装，标称温度范围为 –40° C 至 85° C 。

特点

输入电压范围： 4.5 V 至 28 V 输出电压范围： 1 V 至 12 V 可选择的轻负载运转模式（连续/自动跳变/ Out-of-Audio?模式）

可编程下降(droop)补偿电压伺服可调软启动

200kHz 至 1MHz 定值频率 PWM

可选择电流/D-CAP 模式架构通道间 180° 相位转换电阻或电感 DCR 电流感应针对每个通道的供电良好输出指示过电流限(OCL)/过电压(OVP)/欠压(UVP)/欠压锁定(UVLO)保护（过电压失效选项）

热关断（非闭锁[non-latch]）输出放电功能（失效选项）集成启动 MOSFET 开关QFN32 (RHB)

应用

笔记本电脑系统及输入/输出总线液晶电视、多功能一体机(MFP)的负载点?????????????????典型应用电路

德州仪器 2008年第二季度

电源管理新产品回顾

Power Management New Products Review Texas Instruments 2Q 2008VLDOIN VTT VDDQ

Standard DDR Application Diagram

regulator. It is specifically designed for low input voltage, low cost,

low noise and low external component count systems where space is at a premium.The TPS51200 maintains fast transient response only requiring a

minimum of 20 μF of ceramic output capacitance. The TPS51200

supports remote sensing function and all features required to power the DDR, DDR2, DDR3, and low-power DDR3/DDR4 VTT bus termination according to the JEDEC specifications.In addition, the TPS51200 provides an open-drain PGOOD signal to monitor the output regulation and an EN signal which can be used

to discharge VTT during S3 (suspend to RAM) for DDR application.

The TPS51200 is available in the thermally efficient 10-pin SON

PowerPAD? (green ROHS compliant and Pb free) and is specified

from –40 °C to 85° C.Features

?Input voltage range: supports 2.5-V and 3.3-V rail ?VLDOIN voltage range: 1.1 V to 3.6 V

?Sink/source termination regulator includes droop compensation ?Requires only 20-μF (min) ceramic output capacitance for memory termination (DDR) applications ?PGOOD to monitor output regulation ?EN input

?REFIN input allows for flexible input tracking either through resistor divider or directly

?Remote sensing (VOSNS)

?±10-mA buffered reference (REFOUT)

?

Built-in Soft Start, UVLO and OCL ?Thermal shutdown

?

Meets DDR, DDR2 JEDEC specifications and supports DDR3 and low-power DDR3/DDR4 VTT applications ?10-pin SON with PowerPAD Applications

?Memory termination regulator for DDR, DDR2, DDR3 and low-power DDR3/DDR4

?Notebook, desktop, server, telecom, datacom, GSM base station,LCDTV/PDPTV, copier, printer and set-top box

吸收/馈送 DDR 终端稳压器TPS51200 是吸收/馈送 DDR 终端稳压器，针对低输入电压、低成本、低噪音且外部元件数量极少的系统进行了特别的优化，以获取额外的空间裕量。

TPS51200 保持了其快速瞬态响应的特性，仅需要一个最小化的 20μF 陶瓷输出电容。TPS51200 支持遥感(remote sensing)功能，所有特性均是为 DDR 、DDR2、DDR3及低功耗DDR3/DDR4 VTT 总线终端供电所必备的，符合 JEDEC 规范。此外，TPS51200 还针对 DDR 应用提供了漏极开路供电良好(PGOOD)指

示信号以监测输出稳压，并提供了使能(EN)信号以用于 S3（suspend to RAM ，挂起到内存）期间 VTT 放电。

TPS51200 采用高能效(thermally ef?cient)的 10 引脚 SON Power PAD? 封装（绿色 ROHS 兼容，无铅），指定温度范围为：–40 °C 至 85° C 。

特点

输入电压范围：可支持 2.5V 及 3.3V 电源轨

VLDOIN 电压范围：1.1 V 至 3.6 V 吸收/馈送终端稳压器包括了下降(droop)补偿功能

仅需要 20μF （最小值）的陶瓷输出电容即可用于内存终端应用

供电良好(PGOOD)指示信号用以监测输出稳压使能输入

基准(REFIN)输入可支持灵活的输入追踪——电阻分频器或直接实现遥感功能(VOSNS)±10mA 缓冲基准(REFOUT)内置软启动、欠压锁定及过电流限热关断符合 DDR 、DDR2 JEDEC 规范，并支持 DDR3 及低功耗 DDR3/DDR4 VTT 应用带

PowerPAD 的

10 引脚

SON 封装

应用DDR 、DDR2、DDR3 及低功耗 DDR3/DDR4 的内存终端稳压器

笔记本、手提电脑、服务器、电信、数据通信、GSM 基站、液晶电视/

等离子电视、复印机、打印机及机顶盒

???????????????标准 DDR 应用框图

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review TMS320F28015 Digital Signal Controller ?

C2000? Digital Signal Controllers

C2000 DSCs are used to provide full digital control in a wide range

of power-supply applications from AC/DC solutions for telecommuni-cations and servers, to multi-channel isolated and non-isolated DC/DC converters, and DC/AC inverters for uninterruptible power supplies and green energy generation such as solar inverters and wind turbines.

TMS320F28015 Features

?60-MHz controller for AC line and off-line DC/DC

?150-ps PWM resolution (4 channels)

?32-KB flash and 12-KB RAM on-chip ?Fast 12-bit ADC with 16 input channels

?Free Digital Power Software Library

Key Target Applications

?Telecom and server rectifiers

?Single controller for primary and secondary

Performance ?32-bit 60-MHz DSP controller

Integration ?32-KB Flash/12-KB RAM

?8 PWM channels (4 with 150-ps resolution)?ADC: 12-bit, 16 channels, 3.75 MSPS

TMS320F28015 数字信号控制器

C2000? 数字信号控制器

C2000 DSC 用于为各种各样的电源应用提供全数字的控制，其范围从 AC/DC

解决方案（用于电子通信及服务器）到多通道隔离型/非隔离型 DC/DC

转换器，并包括了用于不间断电源的 DC/AC 逆变器以及用于产生绿色能源的太阳能逆变器及风力涡轮。TMS320F28015 特点

60MHz 控制，适用于 AC 线路及离线 DC/DC 应用150ps 脉宽调制分辨率（4 通道）

芯片内置 32KB 闪存及 12KB RAM

快速的 12 位 ADC ，具有 16 个输入通道

免费的数字电源软件库?????

主要目标应用

电信及服务器整流

单个控制器，用于主控(primary)或次级控制(secondary)

性能

32 位 60MHz DSP 控制器

集成

32KB 闪存/ 12KB RAM

8个脉宽调制通道（其中四个具有 150 ps 的分辨率）ADC ：12位，16通道，3.75 MSPS

??????

德州仪器 2008年第二季度

电源管理新产品回顾

Power Management New Products Review

Texas Instruments 2Q 2008

C2000? Digital Signal Controllers C2000 DSCs are used to provide full digital control in a wide range

of power-supply applications from AC/DC solutions for telecommuni-cations and servers, to multi-channel isolated and non-isolated

DC/DC converters, and DC/AC inverters for uninterruptible power

supplies and green energy generation such as solar inverters and wind turbines.

TMS320F28044 Features

?100-MHz controller for multi-channel DC/DC

?Single controller for six or more independent rails and 16 phases ?150-ps PWM resolution (16 channels) ?128-KB flash and 20-KB RAM on-chip ?Fast 12-bit ADC with 16 input channels

?Free Digital Power Software Library Key Target Applications

?Complex point-of-load for telecommunications infrastructure

Performance

?32-bit 100-MHz DSP controller Integration

?Complete controller for up to 16 outputs/phases ?Supports PMBus

?10 Independent buck converters at 300-kHz switching frequency TMS320F28044 数字信号控制器

C2000?

数字信号控制器C2000 DSC 用于为各种各样的电源应用提供全数字的控制，其范围从 AC/DC 解决方案（用于电子通信及服务器）到多通道隔离型/非隔离型 DC/DC 转换器，并包括了用于不间断电源的 DC/AC 逆变器以及用于产生绿色能源的太阳能逆变器及风力涡轮。

TMS320F28044 特点100MHz 控制，适用于多通道 DC/DC 应用单个控制器可控制 6 个或更多的独立电源导轨以及 16 个相位150ps 脉宽调制分辨率（16 通道）芯片内置 128KB 闪存及 20KB RAM 快速的 12 位 ADC ，具有 16 个输入通道

免费的数字电源软件库

??????主要目标应用电信基础设施的复合负载点

性能

32 位 100MHz DSP 控制器集成

完全的控制器，可支持高达

16 个输出/相位

支持 PMBus

10 个独立的降压转换器，转换频率 300 kHz ?????

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008

Power Management New Products Review

C2000? Digital Signal Controllers

C2000 DSCs are used to provide full digital control in a wide range of power-supply applications from AC/DC solutions for telecommuni-cations and servers, to multi-channel isolated and non-isolated

DC/DC converters, and DC/AC inverters for uninterruptible power

supplies and green energy generation such as solar inverters and wind turbines.

TMS320F2833x Features

?150-MHz controller for solar, wind, and UPS ?32-bit Floating-point unit

?512-KB flash and 68-KB RAM on-chip ?Fast 12-bit ADC with 16 input channels ?Free Digital Power Software Library

Key Target Applications ?Solar inverters

?Wind turbines

?Uninterruptible power supplies Performance

?150-MHz floating-point DSP controller ?Software compatible with all F28xx DSCs

TPS320F2833x 数字信号控制器

C2000?

数字信号控制器C2000 DSC 用于为各种各样的电源应用提供全数字的控制，其范围从 AC/DC 解决方案（用于电子通信及服务器）到多通道隔离型/非隔离型 DC/DC 转换器，并包括了用于不间断电源的 DC/AC 逆变器以及用于产生绿色能源的太阳能逆变器及风力涡轮。

TMS320F2833x 特点150MHz 控制，适用于太阳能、风能及不间断电源(UPS)应用32位浮点型单元芯片内置 512KB 闪存及 68KB RAM 快速的 12 位 ADC ，具有 16 个输入通道

免费的数字电源软件库

?????主要目标应用太阳能逆变器风力涡轮

不间断电源

性能

150MHz 浮点型 DSP 控制器与所有的F28xx 系列 DSC 软件兼容

?????

1

Power Management New Products Review Texas Instruments 2Q 2008 18Portable Power

TPS62240/42/43, 2.25-MHz 300-mA Step-Down Converter in 2 x 2 SON/TSOT-23 Package ?

TPS62243DRV L1

V IN

C

V OUT1.8 V

Description

The TPS62240 device is a high-efficiency synchronous step-down

DC/DC converter optimized for battery powered portable applications.

It provides up to 300-mA output current from a single Li-Ion cell and

is ideal to power portable applications like mobile phones and other

portable equipment.

With an input voltage range of 2 V to 6 V, the device supports

applications powered by Li-Ion batteries with extended voltage range,

two- and three-cell alkaline, 3.3-V and 5-V input voltage rails.

The TPS62240 operates at 2.25-MHz fixed switching frequency and

enters Power Save Mode operation at light load currents to maintain

high efficiency over the entire load current range.

The Power Save Mode is optimized for low output voltage ripple.

For low-noise applications, the device can be forced into fixed-

frequency PWM mode by pulling the MODE pin high. In the shutdown

mode, the current consumption is reduced to less than 1 μA.

TPS62240 allows the use of small inductors and capacitors to

achieve a small solution size.

The TPS62240 is available in a 5-pin TSOT-23 and 6-pin 2mm x 2mm

SON package.

Features

?High-efficiency step-down converter

?Output current up to 300 mA

?V IN range from 2 V to 6 V for Li-Ion batteries with extended

voltage range

?2.25-MHz fixed frequency operation

?Power Save Mode at light load currents

?Output voltage accuracy in PWM Mode ±1.5%

?Adjustable output voltage from 0.6 V to V IN

?Typical 15-μA quiescent current

?100% duty cycle for lowest dropout

?Available in a TSOT23 and 2 x 2 x 0.8 mm SON package

?Allows < 1 mm solution height

Applications

? Bluetooth?headset

? Cell phones, smart-phones

? WLAN

? PDAs, pocket PCs

? Low-power DSP supply

? Portable media players

? Digital cameras

便携式电源

TPS62240/42/43，采用 2 x 2 SON/TSOT-23 封装的 2.25MHz 300mA 步降转换器

概述

TPS62240 是高效同步步降 DC/DC 转换器，针对电池供电的便携式应

用进行了优化。该器件可通过单个锂离子电池提供高达 300 mA的输出

电流，可理想的用于为便携式应用供电，诸如移动电话及其他便携式设

备。

该器件的输入电压范围为 2V 至 6V，可支持扩展电压范围的锂离子电池

供电应用，或是 2 到 3 块碱性电池以及 3.3V 和 5V 输入电压轨供电的应

用。

TPS62240 工作于 2.25 MHz 的固定转换频率，在倾负载电流情况下可进

入功耗节省模式运行，从确保了整个负载电流范围内的高效率。

功耗节省模式针对低输出电压纹波进行了优化。对于低噪声的应用而

言，上拉MODE 引脚至高电平可使该器件强制进入固定频率脉宽调制模

式。在关断模式下，器件的电流损耗可降至低于1 μA。

TPS62240 允许使用小电感及小电容，以实现小型的解决方案尺寸。

TPS62240 采用 5 引脚 TSOT-23 封装或 6引脚 2mm x 2mm SON 封装。

特点

高效步降转换器

输出电流高达 300 mA

输入电压(V IN)范围从 2 V 至 6 V ，适用于扩展温度范围的锂离子电池

2.25MHz 固定频率运转

轻负载电流时进入功耗节省模式

脉宽调制模式下输出电压精度为±1.5%

可调节输出电压范围：0.6V 至 V IN

典型的 15μA 静态电流

100% 责任周期，以实现最低的压降(dropout)

可采用 TSOT23 封装或 2 x 2 x 0.8 mm SON 封装

可实现解决方案高度小于 1 mm

应用

蓝牙(Bluetooth?)耳机

蜂窝电话、智能电话

WLAN

PDA、掌上电脑

低功耗 DSP 电源

便携式媒体播放器

数码相机

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德州仪器 2008年第二季度电源管理新产品回顾

德州仪器 2008年第二季度

电源管理新产品回顾

Texas Instruments 2Q 2008Power Management New Products Review TPS62260/61/62, 2.25-MHz 600-mA Step-Down Converter in 2 x 2 SON/TSOT-23 Package ?

L1

V IN C V OUT

1020304050607080

90100I O - Output Current (mA)

E f ?c i e n c y (%)

Description

The TPS62260 device is a high-efficiency synchronous step-down

DC/DC converter optimized for battery powered applications. It

provides up to 600-mA output current from a single Li-Ion cell and is ideal to power mobile phones and other portable applications. With an wide input voltage range of 2 V to 6 V, the device supports applications powered by Li-Ion batteries with extended voltage range, two- and three cell alkaline batteries, 3.3-V and 5-V input voltage rails.

The TPS62260 operates at 2.25-MHz fixed switching frequency and

enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range. The Power Save Mode is optimized for low output voltage ripple. For low-noise applications, the device can be forced into fixed-frequency PWM mode by pulling the MODE pin high. In the shutdown mode, the current consumption is reduced to less than 1 μA. TPS62260

allows the use of small inductors and capacitors to achieve a

small solution size. The TPS62260 is available in a very small 2 mm x 2 mm 6-pin SON and TSOT-23 5-pin package.

Features

?High-efficiency step-down converter

?Output current up to 600 mA

?V IN

range from 2 V to 6 V for Li-Ion batteries with extended voltage range

?2.25-MHz fixed frequency operation

?Power Save Mode at light load currents ?Output voltage accuracy in PWM Mode ±1.5% ?Typical 15-μA quiescent current ?100% duty cycle for lowest dropout ?Available in a TSOT23 and 2 x 2 x 0.8 mm SON package

?Allows < 1 mm solution height

Applications ? PDAs, pocket PCs ? Low-power DSP supply ? Portable media players ? Digital cameras

TPS62260/61/62，采用 2 x 2 SON/TSOT -23 封装的 2.25MHz 600mA 步降转换器

概述

TPS62260是高效同步步降 DC/DC 转换器，针对电池供电应用进行了优化。该器件可通过单个锂离子电池提供高达 300 mA 的输出电流，可理想的用于为移动电话及其他便携式设备供电。该器件的输入电压范围为 2V 至 6V ，可支持扩展电压范围的锂离子电池供电应用，或是 2 到 3 块碱性电池以及 3.3V 和 5V 输入电压轨供电的应用。

TPS62260 工作于 2.25 MHz 的固定转换频率，在倾负载电流情况下可进

入功耗节省模式运行，从确保了整个负载电流范围内的高效率。功耗节省模式针对低输出电压纹波进行了优化。对于低噪声的应用而言，上拉MODE 引脚至高电平可使该器件强制进入固定频率脉宽调制模式。在关断模式下，器件的电流损耗可降至低于1 μA 。TPS62260 允许使用小电感及小电容，以实现小型的解决方案尺寸。

TPS62240 可采用 2mm x 2mm 6引脚 SON 封装或 5 引脚 TSOT -23封装。

特点

高效步降转换器输出电流高达 600 mA

输入电压(V IN )范围从 2 V 至 6 V ，适用于扩展温度范围的锂离子电池

2.25MHz 固定频率运转

轻负载电流时进入功耗节省模式

脉宽调制模式下输出电压精度为 ±1.5%

典型的 15μA 静态电流100% 责任周期，以实现最低的压降(dropout)可采用 TSOT23 封装或 2 x 2 x 0.8 mm SON 封装

可实现解决方案高度小于 1 mm 应用PDA 、掌上电脑低功耗 DSP 电源便携式媒体播放器数码相机

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Power Management New Products Review Texas Instruments 2Q 2008 TPS62290/93, 1-A Step-Down Converter in 2 x 2 SON Package

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TPS62290DRV L1

V

C

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I O - Output Current (mA)

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0.000010.00010.0010.010.11 Description

The TPS6229x device is a high-efficiency synchronous step-down

DC/DC converter optimized for battery powered portable applications.

It provides up to 1000-mA output current from a single Li-Ion cell.

With an input voltage range of 2.3 V to 6 V, the device supports

batteries with extended voltage range and is ideal for portable power

applications like mobile phones and other portable equipment.

The TPS6229x operates at 2.25-MHz fixed switching frequency and

enters Power Save Mode operation at light load currents to maintain

high efficiency over the entire load current range.

The Power Save Mode is optimized for low output voltage ripple. For

low-noise applications, the device can be forced into fixed-frequency

PWM mode by pulling the MODE pin high. In the shutdown mode,

the current consumption is reduced to less than 1 μA. The TPS6229x

allows the use of small inductors and capacitors to achieve a small

solution size.

The TPS6229x is available in a 2 mm x 2 mm 6-pin SON package.

Features

?High-efficiency step-down converter

? Output current up to 1000 mA

? V IN range from 2.3 V to 6 V

? 2.25-MHz fixed frequency operation

? Power Save Mode at light load currents

? Output voltage accuracy in PWM mode ±1.5%

? Fixed output voltage options

? Typ. 15-μA quiescent current

? 100% duty cycle for lowest dropout

? Voltage positioning at light loads

? Available in a 2 x 2 x 0.8 mm SON package

Applications

?Cell phones, smart-phones

? WLAN

? PDAs, pocket PCs

? Low-power DSP supply

? Portable media players

? POL

TPS62290/93, 采用 2 x 2 SON 封装的 1A 步降转换器

概述

TPS6229x 是高效同步步降 DC/DC 转换器，针对电池供电应用进行了优

化。该器件可通过单个锂离子电池提供高达 1000 mA的输出电流。

TPS6229x 的输入电压范围为 2.3V 至 6V，支持扩展电压范围的电池供电

应用，可理想的用于为便携式设备供电，诸如移动电话及其他便携式设

备。

TPS6229x 工作于 2.25 MHz 的固定转换频率，在倾负载电流情况下可进

入功耗节省模式运行，从确保了整个负载电流范围内的高效率。

功耗节省模式针对低输出电压纹波进行了优化。对于低噪声的应用而

言，上拉MODE 引脚至高电平可使该器件强制进入固定频率脉宽调制模

式。在关断模式下，器件的电流损耗可降至低于1 μA。TPS6229x 允许

使用小电感及小电容，以实现小型的解决方案尺寸。

TPS6229x 采用 2mm x 2mm 6引脚 SON 封装。

特点

高效步降转换器

输出电流高达 1000 mA

输入电压(V IN)范围从 2.3 V 至 6 V

2.25MHz 固定频率运转

轻负载电流时进入功耗节省模式

脉宽调制模式下输出电压精度为±1.5%

定值输出电压选项

典型的 15μA 静态电流

100% 责任周期，以实现最低的压降(dropout)

采用 2 x 2 x 0.8 mm SON 封装

应用

蜂窝电话、智能电话

WLAN

PDA、掌上电脑

低功耗 DSP 电源

便携式媒体播放器

负载点应用

?

?

?

?

?

?

?

?

?

?

?

?

?

?

?

?

德州仪器 2008年第二季度电源管理新产品回顾