24-Channel Constant-Current LED Driver with Global Brightness and LED Open Short Detection



The TLC5952 is a 24-channel, constant-current sink driver. Each channel can be turned on/off with internal register data. The output channels are grouped into three groups of eight channels each. Each channel group has a 128-step global brightness control (BC) function. Both on/off data and BC are writable via a serial interface. The maximum current value of all 24 channels is set by a single external resistor.

The TLC5952 has three error detection circuits: LED open detection (LOD), LED short detection (LSD), and a thermal error flag (TEF). The error detection is read via a serial interface.


  • 24-Channel Constant-Current Sink Output with On/Off Control
  • Current Capability:
    • 35 mA for 16 Channels
    • 26.2 mA for 8 Channels
  • Global Brightness Control (BC) for Each Color Group: 7-Bit (128 Step), Three Groups
  • LED Power-Supply Voltage up to 15 V
  • VCC = 3.0 V to 5.5 V
  • Constant-Current Accuracy:
    • Channel-to-Channel = ±1%
    • Device-to-Device = ±3%
  • CMOS Logic Level I/O
  • Data Transfer Rate: 35 MHz
  • BLANK Pulse Width: 15 ns
  • Open Load, Short Load, and Over-Temperature Detection
  • Thermal Shutdown (TSD) with Auto Restart
  • Delay Switching to Prevent Inrush Current
  • Operating Temperature: -40°C to +85°C
  • Packages: HTSSOP-32, QFN-32
    • Full-Color LED Displays
    • LED Signboards

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Parametrics Compare all products in Signage/Linear

Data Vin (Min) (V)
Data Vin (Max) (V)
Output Channels
Analog Dimming Steps
Data Input
Data Transfer Rate (Typ) (MHz)
Ch to Ch Accuracy (Typ) (+/- %)
Per Channel PWM Steps
Per Channel Drive (mA)
LED Voltage (Max) (V)
Special Features
Operating Temperature Range (C)
Approx. Price (US$)
TLC5952 TLC5947 TLC5951
3    3    3   
5.5    5.5    5.5   
24    24    24   
128      256   
Serial    Serial    Serial   
35    30    30   
1    2    1.5   
  4096    4096   
35    30    40   
15    30    15   
Fault Reporting
LED Open Detection
Power Good/Error Flag
Thermal Shutdown   
Internal GS Clock
Thermal Shutdown   
Fault Reporting
LED Open Detection
Power Good/Error Flag
Thermal Shutdown   
Catalog    Catalog    Catalog   
-40 to 85    -40 to 85    -40 to 85   
1.35 | 1ku    1.95 | 1ku    1.55 | 1ku   

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