TI最新48通道LED显示屏产品介绍

Grey Scale limited
PWM Driver LED Utilization 95%
TLC5955 Benefit No.3
-- 7bit Dot correction for each channel, improve the uniformity of LED panel -- TLC5955 优点3: 每个通道都有7bit的点校正，提高LED屏的一致性
TLC5955 Benefit No.4
-- Low Knee Voltage, reduce power consumption of the whole system -- TLC5955 优点4: 低转折电压, 降低系统的功耗
Competitor Part w/SRAM ~0.5V @10mA fd TLC5955 0.22V @10mA
TLC5954 Benefit
-- 48channel, ON/OFF LED driver with LOD/LSD
TLC5954
48ch, Constant-Current LED Driver with 3x7bit BC, 3bit MC, LOD & LSD
Features
48 Outputs
1060X power saving at GS=0000h
TLC5955 Benefit
-- 48channel, PWM LED driver with dot correction
TLC5955
48ch, 16bit PWM LED Driver with 3x7bit BC, 3bit MC, 7bit DC & LOD
Benefits
Best to drive 16 RGB LED lamps, easy layout Maximum flexibility with software programming to achieve high quality video output, more smooth grayscale performance. 3V and 5V logic interface Improves uniformity for the LED display Improves LED display image with uniform brightness Reduces system power consumption Reduces maintenance cost
LED Driver
低成本
Professional(Architecture) Lighting
简单结构
Signboard & Gaming
3
China LED Signage Mkt’s New Trend
1.6mm pitch
TI’s Strategic Movement in WW Market
PWM Driver has Better Grayscale Depth On/Off Driver
Higher LED Utilization
On/Off Driver LED Utilization 70%
PWM Driver
Shutter Speed 500
Shutter Speed 1000
Luminosity Before Dot Correction
100.0
80.0
60.0
40.0
20.0
0.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Top Graph: 16 LED’s driven by the same forward current. Each LED has a different intensity due to manufacturing differences.
Luminosity After Dot Correction
100.0
80.0
60.0
40.0 20.0 0.0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Bottom Graph: 16 LED’s after Dot Correction is applied. Now all have different forward currents but the same intensity.
TI 最新48通道LED显示屏产品介绍
2014年4月
What’s your products?
Backlighting
TN/STN Display Color STN Display Color TFT Display
(DC, PWM, GS)
高性能
Video Display
高分辨率
(Accuracy, Efficiency)
LED Illuminations
9
TLC5954 Benefit No.1
-- Max flexibility for current setting with software programming, Rref removal -- TLC5954 优点1: 用软件实现白平衡调节，无外接电阻。
24ch Solution Special features: Basic style
On/Off Ghost removal failure detection PWM

TLC5951 TLC5952
48ch Solution
Lower system cost Ghost removal Failure detection Low Grey Scale Enhancement Low Sys Power consump
Applications
LED Video Displays
LED Message Boards
LED Illuminations
14
TLC5955 Benefit No.1
-- Max flexibility for current setting with software programming, Rref removal -- TLC5955 优点1: 用软件实现白平衡调节，无外接电阻。
Software to configure white balance
Red + Green + Blue = White? IREF RES Removal
TLC5955 Benefit No.2
-- 16bit PWM Driver, better grayscale depth and higher LED utilization -- TLC5955 优点2: PWM驱动器，灰度更好，LED利用率更高
Features
48 Outputs 16bit PWM Constant-Current with 3x7bit BC and 3bit MC for 35mA, no external resistor. IC Supply Voltage Range: 3.0 – 5.5V 7bit DC for each output. Precise Constant Current Regulation: Channel-to-Channel: ± 2 % (typ) Device-to-Device: ± 2 % (typ) Low knee voltage: 0.25V@19mA LED Open/Short Detection
GND
GND
1 LED Short Detection (LSD)
Biblioteka Baidu
TLC5954 Benefit No.3
-- Power Save Mode -- TLC5954 优点3: 省电模式
ICC = 16mA @ 18mA Iout Without power save
ICC = 15uA @ 18mA Iout With power save
Improves LED display image with uniform brightness
Reduces Inrush Current, less EMI Reduces maintenance cost
Applications
LED Video Displays
LED Message Boards
Low Knee Voltage @ 10mA • Min VLED 4.2V
(max LED VF of 3.5V & 0.1V VDS margin)
Precise Constant Current Regulation: Channel-to-Channel: ± 1 % (typ) Device-to-Device: ± 2 % (typ)
Output Current Switching Delay LED Open/Short Detection
Maximum flexibility with software programming to achieve high quality video output, easy brightness settings in 2 ways
3V-3.6V logic interface, drives multiple of LED lamps in series
16CH
16CH
16CH
48CH
RGB Grouping OR
6
48CH Family （48通道系列）
ON/OFF PWM only TLC5954 TLC5955 TLC5958 Yes No No No Yes No PWM Low w/SRAM Grey Scale Enhance No No Yes No No Yes Typical App <16 scan < 4 scan >16 scan RTM Target Q2/14 Q2/14 Q2/14
Software to configure white balance
Red + Green + Blue = White? IREF RES Removal
TLC5954 Benefit No.2
-- LED Open Detect/LED Short Detect for low maintain cost -- TLC5954 优点2: 有LED开路和短路检测，降低维护费用
Benefits
Best to drive 16 RGB LED lamps, easy layout
ON/OFF Constant-Current with 3x7bit BC and 3bit MC Control for 35mA, no external resister.
IC Supply Voltage Range: 3.0 – 3.6V LED Voltage Range: 10V
Monitor the status of LED panel
Traffic information boards Application
VLED TLC5954 IREF OUTn LED short can be detect TLC5954 IREF OUTn LED open can be detect 2 LED Open Detection (LOD) VLED

TLC59282

TLC59283 TLC5948A TLC5929
TLC5954 TLC5955 TLC5958
48CH Devices’ PCB Routing Advantage –
Lower System cost Better performance
• Simpler Routing • less layer PCB • Simpler gives less EMI • Smaller PCB area • Simply can’t fit w/16CH in higher density • Simplify system design • RGB use only 1 REF; software programmable for white balance • Reduce manufacturing cost and time