Powerint INN3468C驱动器方案

Powerint INN3468C＋TMIMX102U DER636 40W LED驱动器解决方案Powerint公司的40W多输出反激转换器是四个LED驱动器,采用InnoMuxTMIMX102U和InnoSwitchTM3-MX INN3468C,由于不需要升压和降压转换器级而极大地改善了系统效率.它还简化开发和制造多个输出的电源. InnoSwitch3-MX架构是革命性,在单个IC器件集合了初级和次级控制器,高压功率开关,以及检测元件和安全的反馈机制. InnoSwitch3-MX初级控制器是准谐振(QR)反激控制器,能工作在连续导通模式(CCM),采用可变电流控制方案.初级包含抖动振荡器,磁耦合次级控制器的接收器电路,限流控制器, PR IMA RY BYPASS引脚上的5V稳压器,可听噪音降噪引擎,旁路过压检测电路,无损耗输入检测电路,限流的选择电路,过压保护,前沿消隐,次级输出二极管/SR MOSFET短路保护电路以及650 V / 725 V /750 V功率开关. InnoSwitch3-MX是和InnoMux控制器配对.它是LED背景光控制器,消除了降压和LED背景光升压转换器,有一个或两个恒压输出,单独调整输出,瞬态响应±5% CV,典型输出电压,一个CV模式为5V到22V,两个CV模式为5V和12V到22V,1-4串LED背景光,LED串的匹配精度为3%,高达100V串电压/高达960mA 总串电流,高达2:1 LED串行电压范围.对所有输出有单独的过载保护,串不平衡/短路/开路保护以及输出过压设定用于自动重起.采用nnoMuxTM IMX102U和InnoSwitchTM3-MX INN3468C的40W多输出反激转换器采用独特的单级转换,多个输出和反激架构,通用90 VAC到265VAC电压输入,能源之星8.0效率兼
容,5V/3A CV输出,LED串电压范围30V到50V,可配置成模拟调光模式,直接PWM调光模式,滤波PWM调光模式以及混合调光模式.本文介绍了InnoSwitch3-MX产品亮点,典型应用/性能图,初级框图和次级框图,以及InnoMux产品亮点, 控制器功能框图,采用nnoMuxTM IMX102U和InnoSwitchTM3-MX INN3468C的DER 636 40W多输出反激转换器主要特性和指标,电路图,材料清单和PCB设计图.
The InnoSwitch3-MX together with InnoMux dramatically improvessystem efficiency by eliminating the boost and buck converter stages.
It also simp lifi es the development and manufacturing of multiple outputpower supplies, particularly those in compact enclosures or with highefficiency requirements. The InnoSwitch3-MX architecture is revolutionaryin that the devices incorporate both primary and secondarycontrollers, with sense elements and a safety-rated feedback mechanism into a single IC.
Close component proximity and innovative use of the integratedcommunication link, FluxLink, permit accurate control of a secondarysidesynchronous rectification MOSFET with Quasi-Resonant switchingof primary integrated high-voltage switch to maintain high efficiencyacross the entire load range.
This version of InnoSwitch3 is intended to be used with InnoMux formultiple output, single-stage power supplies for monitors and TVs.
This enables very high system efficiency on a small PCB foot print.
The InnoSwitch3-MX combines a high-voltage power switch, alongwith both primary-side and secondary-side controllers in one device.
The InnoSwitch3-MX is intended to be paired with an InnoMuxcontroller.
The InnoSwitch3-MX architecture incorporates a novel inductivecoupling feedback scheme using the package leadframe and bondwires to provide a safe, reliable, and low-cost means to accuratelycommunicate power requests from the InnoMux controller to theprimary controller.
The primary controller on InnoSwitch3-MX is a quasi-resonant (QR)flyback controller that has the ability to operate in continuousconduction mode (CCM). The controller uses a variable currentcontrol scheme. The primary consists of a jitter oscillator; a receivercircuit magnetically coupled to the secondary controller, a currentlimit controller, 5 V regulator on the PRIMARY BYPASS pin, audiblenoise reduction engine, bypass overvoltage detection circuit, alossless input line sensing circuit, current limit selection circuitry,overvoltage protection, leading edge blanking, secondary outputdiode / SR MOSFET short protection circuit and a 650 V / 725 V /750 V power switch.
The secondary controller consists of a transmitter circuit that ismagnetically coupled to the primary receiver, synchronous rectifier(SR) MOSFET driver, timing functions and a host of integratedprotection features.
InnoSwitch3-MX产品亮点:
Based on InnoSwitch3
• High efficiency across full load range
• Incorporates a multi-mode Quasi-Resonant (QR) / CCM flybackcontroller, 650 V, 725 V or 750 V switch, secondary-side sensing andsynchronous rectification driver
• PowiGaN™ technology – up to 85 W without heat sink(INN3478C, INN3479C and INN3470C)
• Integrated FluxLink™, HIPOT-isolated, feedback link
• Instantaneous transient response ±5% CV with 0%-100%-0%load step
• Partner IC to InnoMux
EcoSmart™ – Energy Efficient
• Easily meets all global energy efficiency regulations
• Low heat dissipation
Advanced Protection / Safety Features
• Primary sensed output OVP
• Open SR FET gate detection
• Hysteretic thermal shutdown
• Input voltage monitor with accurate brown-in/brown-out andovervoltage protection
Full Safety and Regulatory Compliance
• Reinforced insulation
• Isolation voltage >4000 VAC
• 100% production HIPOT compliance testing
• UL1577 and TUV (EN60950) safety approved
• Enables designs that have “A” performance criteria for EN61000-4suite of test standards, including EN61000-4-2, 4-3 (30 V/m), 4-4,4-5, 4-6, 4-8 (100 A/m) and 4-9 (1000 A/m)
Green Package
• Halogen free and RoHS compliant
Applications
• Use with InnoMux for Energy Star 8, CEC, and 2021/2023 EUlabeling for monitors and TVs
图1.InnoSwitch3-MX典型应用/性能图
图2.监视器/TV应用简化电路
图3.InnoSwitch3-MX初级框图
图4.InnoSwitch3-MX次级框图
When paired with InnoSwitch3-MX, InnoMux dramatically improves thesystem efficiency of monitors and TVs by eliminating the boost andbuck converter stages using a single-stage flyback topology. Thisenables very high system efficiency up to 91%, on a small PCB footprint.
The LED backlight control offers excellent minimum threshold regulationas well as analog and several PWM dimming options. The sequencedPWM dimming option further improves visual performance and stabilizespower demand. Extensive protection features are provided.
InnoMux产品亮点:
CV and 4-Channel LED Backlight Controller
• Eliminates buck and LED backlight boost converters
• One or two constant voltage outputs
• Independently regulated outputs with instantaneous transientresponse ±5% CV on 0%-100%-0% load step
• Typical output voltages
• One CV mode: 5 V to 22 V
• Two CV mode: 5 V and 12 V to 22 V
• 1-4 string LED backlight
• 3% matching accuracy for LED strings
• Analog, PWM, sequenced PWM and filtered PWM operation
• Up to 100 V string voltage / up to 960 mA total string current
• Up to 2:1 LED string voltag e range
Advanced Protection / Safety Features
• Individual overload protection for all outputs
• String imbalanced / short / open protection
• Output overvoltage set for auto-restart
Convenient Packages
• 28-Lead HSOP for single-sided wave soldered PCBs or small 28-LeadQFN (5x5 mm Body) for compact multilayer designs
InnoMux应用:
• ENERGY STAR 8, CEC, and 2021/2023 EU labeling for monitors andTVs
图5. InnoMux+nnoSwitch3-MX典型电路图
图6.监视器/TV应用简化电路
图7.InnoMux控制器功能框图
采用nnoMuxTM IMX102U和InnoSwitchTM3-MX INN3468C的40W多输出反激转换器
DER 636 40W多输出反激转换器主要特性:
Unique single stage conversion; multiple outputs; flyback architecture
· High full power efficiency across the universal line range
· Energy Star 8.0 efficiency compliance
· High accuracy independently regulated 5 V / 3 A CV output with extremely fast load transient response.
· Four independent CC LED outputs matched to within <3.5% at full current.
· Wide LED string voltage range: 30 V to 50 V makes it suitable for wide range of computer monitor applications.
· Configurable for
o Analog dimming mode
o Straight PWM dimming mode
o Filtered PWM dimming mode
o Hybrid dimming mode
· Control chips et incorporating isolated feedback and communication channels
This engineering report describes a PSU for a LED computer monitor. The 40 W PSU has a 5 V / 3 A CV output and a 25 W output providing power to four CC drivers intended for back-light LED strings in the LED monitor. The current through the individual LED strings is controlled from 0 mA to 156 mA by an analogue signal (ADIM) with a full sca le of 1.5 V. The total maximum power output is 40 W and the input voltage range is 90 VAC to 265 VAC.
The PSU is based on a multiplexed, single-stage, multiple output topology. For each switching cycle, the energy stored in the transformer during the primary conduction interval is delivered to only one of the converters main outputs (CV or LED). The energy from the primary is appropriately distributed between the converter main outputs by a secondary referred master controller according to the loading conditions at the outputs. This multiplexing is achieved by gating the steering FET Q1 appropriately. If energy pulse needs to be delivered to the CV1 output Q1 is turned ON prior to the end of the primary conduction interval. If Q1 is held OFF the energy is delivered to the LED output via the rectification diode D3. The master controller requests switching cycles from the primary as often as it needs to maintain all outputs in regulation. For the described multiplexing algorithm to work correctly it is essential that the transformer turns ratios are chosen such that: the minimum LED output voltage reflected to the primary of the transformer is greater than the CV output voltage reflected to the transformer primary. This technique achieves cross regulation within a fraction of 1% while significantly improving system efficiency when compared to conventional post regulation architectures. The new architecture supports multiple outputs driving both constant current and constant voltage loads, enabling the design of a single switch-mode power conversion stage that powers logic circuitry, USB ports, audio channels, and LED strings simultaneously.
图8.多路复用架构简化电路
This novel architecture is implemented using two controller ICs, the InnoSwitch3-MX IC for primary switching plus SR FET control, and InnoMux IC for output voltage and current control. Selection MOSFET Q1 and D3 are used to direct the energy packet to either the CV or LED output respectively.
图9.DER 636 40W多输出反激转换器外形图:正面
图10.DER 636 40W多输出反激转换器外形图:背面,带散热器
图11.DER 636 40W多输出反激转换器外形图:背面,不带散热器。