TLC5957 48-channel, 16bit ES-PWM LED driver w/ Pre-charge FET, LED OPEN Detection and Caterpillar Cancelling | TI.com

TLC5957 (ACTIVE)

48-channel, 16bit ES-PWM LED driver w/ Pre-charge FET, LED OPEN Detection and Caterpillar Cancelling

 

Description

The TLC5957 is a 48-channel constant current sink driver. Each channel has an individually-adjustable, 65536-step, pulse width modulation (PWM) grayscale (GS) brightness control.

The output channels are divided into three groups, each group has a 512 step color brightness control (CC), CC adjusts brightness between colors. The maximum current value of all 48 channels can be set by 8-step global brightness control (BC). BC adjusts brightness deviation between LED drivers. GS, CC and BC data are accessible via a serial interface port.

TLC5957 has one error flag: LED open detection (LOD), which can be read via a serial interface port. Each constant-current has a pre-charge field- effect transistor (FET), which can remove ghosting and improve display performance on the multiplexing LED display. Besides, TLC5957 has an enhanced circuit, it can cancel the caterpillar effect caused by LED open.

TLC5957 has a poker data transmission mode; GS data length can be configured from 9 bit to 16 bit according to PWM bits in each sub-segment. Poker Mode can significantly increase visual refresh rate in multiplexing applications.

Features

  • 48 Constant-Current Sink Output Channels
  • Sink Current Capability with Max BC/CC data
    • 1~20mA (VCC = 3.3V)
    • 1∼25mA (VCC = 5V)
  • Global Brightness Control (BC): 3-Bit (8 Step)
  • Global Brightness Control (CC) for Each Color Group:
    9-Bit (512 Step), Three Groups
  • LED Power Supply Voltage up to 10V
  • VCC = 3.0 to 5.5V
  • Knee Voltage Vout = 0.24V at 10mA
  • Constant Current Accuracy
    • Channel to Channel = ±1%(Typ), ±3%(Max)
    • Device to Device = ±1%(Typ), ±2%(Max)
  • Data Transfer Rate : 33MHz
  • Grayscale Control Clock : 33MHz
  • Pre-charge FET for Ghost Cancelling
  • Enhanced Circuit for Caterpillar Cancelling
  • Selectable Data Transfer Bit and PWM Bit (9 bit to 16 bit)
  • Selectable Traditional PWM and ES-PWM
  • LED Open Detection (LOD)
  • Thermal Shut Down (TSD)
  • Auto Display Repeat/Auto Data Refresh
  • Delay Switching to Prevent Inrush Current
  • Operating Temperature : –40°C to +85°C

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Parametrics Compare all products in Signage LED display drivers

 
Features
Analog dimming steps
Data transfer rate (Typ) (MHz)
Ch to ch accuracy (Typ) (+/- %)
Package Group
Package size: mm2:W x L (PKG)
Rating
Operating temperature range (C)
TLC5957 TLC59283 TLC59482 TLC5948A TLC5954 TLC5955 TLC5958 TLC59581 TLC59582 TLC6946
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Thermal Shutdown    
ON/OFF LED Driver
Pre-Charge FET    
PWM LED Driver     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    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
ON/OFF LED Driver    
48CH LED Driver
Dot Correction
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Thermal Shutdown    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Pre-Charge FET    
48CH LED Driver
Error Flag
Fault Detection
LED Open Detection
LED Short to Ground Detection
LED Short to VLED Detection
PWM LED Driver
Thermal Shutdown    
Fault Detection
LED Open Detection
PWM LED Driver
Pre-Charge FET
Thermal Shutdown    
512       64     128     128     128     512     512     512     128    
33     35     33     33     30     25     25     25     25     33    
1     1     1     1.5     1     2     1     1     1     1.5    
QFN | 56     SSOP | 24
VQFN | 24    
SSOP | 24     HTSSOP | 24
SSOP | 24    
QFN | 56     HTSSOP | 56
QFN | 56    
QFN | 56     QFN | 56     QFN | 56     SSOP | 24    
56QFN: 64 mm2: 8 x 8 (QFN | 56)     24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)
24VQFN: 16 mm2: 4 x 4 (VQFN | 24)    
24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)     24HTSSOP: 50 mm2: 6.4 x 7.8 (HTSSOP | 24)
24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)    
56QFN: 64 mm2: 8 x 8 (QFN | 56)     56HTSSOP: 113 mm2: 8.1 x 14 (HTSSOP | 56)
56QFN: 64 mm2: 8 x 8 (QFN | 56)    
56QFN: 64 mm2: 8 x 8 (QFN | 56)     56QFN: 64 mm2: 8 x 8 (QFN | 56)     56QFN: 64 mm2: 8 x 8 (QFN | 56)     24SSOP: 52 mm2: 6 x 8.65 (SSOP | 24)    
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