24-Ch 12-Bit PWM LED Driver w/7-Bit Dot Correction 8-Bit Global Brightness



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.


  • 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

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Parametrics Compare all products in Signage & Large Display LED Driver

Analog Dimming Steps
Data Transfer Rate (Typ) (MHz)
Ch to Ch Accuracy (Typ) (+/- %)
Operating Temperature Range (C)
TLC5951 TLC5947 TLC5952
Error Flag
Fault Detection
LED Open Detection
Power Good
Thermal Shutdown   
Internal GS Clock
Thermal Shutdown   
Error Flag
Fault Detection
LED Open Detection
Power Good
Thermal Shutdown   
256      128   
30    30    35   
1.5    2    1   
Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85   

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