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TLC5951

現行

具 7 位元修正和 8 位元全域亮度的 24 通道、12 位元 PWM LED 驅動器

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產品規格表

TLC5951

現行
產品規格表 立即訂購

產品詳細資料

Features Dot Correction, Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power good, Thermal shutdown Analog dimming steps 256 Data transfer rate (typ) (MHz) 30 Ch to ch accuracy (typ) (±%) 1.5 Rating Catalog Operating temperature range (°C) -40 to 85
Features Dot Correction, Error Flag, Fault Detection, LED Open Detection, LED Short to Ground Detection, LED Short to VLED Detection, PWM LED Driver, Power good, Thermal shutdown Analog dimming steps 256 Data transfer rate (typ) (MHz) 30 Ch to ch accuracy (typ) (±%) 1.5 Rating Catalog Operating temperature range (°C) -40 to 85
HTSSOP (DAP) 38 101.25 mm² 12.5 x 8.1 VQFN (RHA) 40 36 mm² 6 x 6 WQFN (RTA) 40 36 mm² 6 x 6
  • 24-Channel Constant-Current Sink Output
  • Current Capability: 40 mA
  • Selectable Grayscale (GS) Control With PWM:
    12-Bit (4096 Step), 10-Bit (1024 Step), 8-Bit (256 Step)
  • Three Independent Grayscale Clocks for Three Color Groups
  • Dot Correction (DC): 7-Bit (128 Step)
  • Global Brightness Control (BC) for Each Color Group: 8-Bit (256 Step)
  • Auto Display Repeat Function
  • Independent Data Port for GS and BC and DC Data
  • Communication Path Between Each Data Port
  • LED Power-Supply Voltage up to 15 V
  • VCC = 3 V to 5.5 V
  • Constant-Current Accuracy:
    • Channel-to-Channel = ±1.5%
    • Device-to-Device = ±3%
  • CMOS Logic Level I/O
  • Data Transfer Rate: 30 MHz
  • 33-MHz Grayscale Control Clock
  • Continuous Base LED-Open Detection (LOD)
  • Continuous Base LED-Short Detection (LSD)
  • Thermal Shutdown (TSD) With Auto Restart
  • Grouped Delay to Prevent Inrush Current
  • Operating Ambient Temperature: –40°C to 85°C
  • Packages: HTSSOP-38, QFN-40
  • 24-Channel Constant-Current Sink Output
  • Current Capability: 40 mA
  • Selectable Grayscale (GS) Control With PWM:
    12-Bit (4096 Step), 10-Bit (1024 Step), 8-Bit (256 Step)
  • Three Independent Grayscale Clocks for Three Color Groups
  • Dot Correction (DC): 7-Bit (128 Step)
  • Global Brightness Control (BC) for Each Color Group: 8-Bit (256 Step)
  • Auto Display Repeat Function
  • Independent Data Port for GS and BC and DC Data
  • Communication Path Between Each Data Port
  • LED Power-Supply Voltage up to 15 V
  • VCC = 3 V to 5.5 V
  • Constant-Current Accuracy:
    • Channel-to-Channel = ±1.5%
    • Device-to-Device = ±3%
  • CMOS Logic Level I/O
  • Data Transfer Rate: 30 MHz
  • 33-MHz Grayscale Control Clock
  • Continuous Base LED-Open Detection (LOD)
  • Continuous Base LED-Short Detection (LSD)
  • Thermal Shutdown (TSD) With Auto Restart
  • Grouped Delay to Prevent Inrush Current
  • Operating Ambient Temperature: –40°C to 85°C
  • Packages: HTSSOP-38, QFN-40

The TLC5951 device is a 24-channel, constant-current sink driver. Each channel has an individually-adjustable, 4096-step, pulse-width modulation (PWM) grayscale (GS) brightness control and 128-step constant-current dot correction (DC). The dot correction adjusts brightness deviation between channels and other LED drivers. The output channels are grouped into three groups of eight channels. Each channel group has a 256-step global brightness control (BC) function and an individual grayscale clock input.

GS, DC, and BC data are accessible via a serial interface port. DC and BC can be programmed via a dedicated serial interface port.

The TLC5951 device has three error-detection circuits for LED-open detection (LOD), LED-short detection (LSD), and thermal error flag (TEF). LOD detects a broken or disconnected LED, LSD detects a shorted LED, and TEF indicates an overtemperature condition.

The TLC5951 device is a 24-channel, constant-current sink driver. Each channel has an individually-adjustable, 4096-step, pulse-width modulation (PWM) grayscale (GS) brightness control and 128-step constant-current dot correction (DC). The dot correction adjusts brightness deviation between channels and other LED drivers. The output channels are grouped into three groups of eight channels. Each channel group has a 256-step global brightness control (BC) function and an individual grayscale clock input.

GS, DC, and BC data are accessible via a serial interface port. DC and BC can be programmed via a dedicated serial interface port.

The TLC5951 device has three error-detection circuits for LED-open detection (LOD), LED-short detection (LSD), and thermal error flag (TEF). LOD detects a broken or disconnected LED, LSD detects a shorted LED, and TEF indicates an overtemperature condition.
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類型 標題 日期
* Data sheet TLC5951 24-Channel, 12-Bit PWM LED Driver With 7-Bit Dot Correction and 3-Group, 8-Bit Global Brightness Control datasheet (Rev. E) PDF | HTML 2017年 7月 27日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note Using the TLC5951 for Keyboard Backlighting 2015年 4月 14日
EVM User's guide TLC5951 EVM User's Guide 2009年 10月 15日

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模擬型號

TLC5951 IBIS Model

SBVM089.ZIP (34 KB) - IBIS Model
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模擬型號

TLC5951/2 IBIS Model (Rev. A)

SLIM242A.ZIP (34 KB) - IBIS Model
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