TLC5955 (ACTIVE)

48ch, 16bit PWM LED Driver with Dot-Correction, Brightness Control, Open/Short Detection

48ch, 16bit PWM LED Driver with Dot-Correction, Brightness Control, Open/Short Detection - TLC5955
 

Description

The TLC5955 is a 48-channel, constant-current sink driver. Each channel has an individually-adjustable, pulse width modulation (PWM), grayscale (GS) brightness control with 65,536 steps and 128 steps of constant-current dot correction (DC). DC adjusts brightness deviation between channels. All channels have a 128-step global brightness control (BC). BC adjusts brightness deviation between the R, G, B color group. The eight-step maximum current control (MC) selects the maximum output current range for all channels of each color group. GS, DC, BC, and MC data are accessible with a serial interface port.

The TLC5955 has two error flags: LED open detection (LOD) and LED short detection (LSD). The error detection results can be read with a serial interface port.

Features

  • 48 Constant-Current Sink Output Channels
  • Sink Current Capability with Maximum MC, DC, and BC Data:
    • 23.9 mA (VCC ≤ 3.6 V, MC = 5)
    • 31.9 mA (VCC > 3.6 V, MC = 7)
  • Grayscale (GS) Control:
    • 16-Bit (65,536 Steps) with Enhanced Spectrum or Conventional PWM
  • Maximum Current (MC) Control:
    • 3 Bits (8 Steps) with a 3-mA to 30-mA Range
    • 3 MC Sets for Each Color Group
  • Dot Correction (DC) Control:
    • 7 Bits (128 Steps) with a 26.2% to 100% Range
  • Global Brightness Control (BC):
    • 7 Bits (128 Steps) with a 10% to 100% Range
    • 3 BC Sets for Each Color Group
  • LED Power-Supply Voltage: Up to 10 V
  • VCC: 3.0 V to 5.5 V
  • Constant-Current Accuracy:
    • Channel-to-Channel: ±2% (typ), ±5% (max)
    • Device-to-Device: ±2% (typ), ±4% (max)
  • Data Transfer Rate: 25 MHz
  • Grayscale Control Clock: 33 MHz
  • Auto Display Repeat
  • Display Timing Reset
  • Auto Data Refresh (GS and DC Only)
  • LED Open Detection (LOD)
  • LED Short Detection (LSD)
  • UVLO Sets Default Data
  • Delay Switching to Prevent Inrush Current
  • Operating Temperature: –40°C to +85°C

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Features
Analog Dimming Steps
Data Transfer Rate (Typ) (MHz)
Ch to Ch Accuracy (Typ) (+/- %)
Operating Temperature Range (C)
Pin/Package
TLC5955 TLC5954 TLC5957 TLC5958 TLC59581 TLC59582
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
ON/OFF 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
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   
128    128    512    512    512    512   
25    30    33    25    25    25   
2    1    1    1    1    1   
-40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85    -40 to 85   
56HTSSOP
56QFN   
56QFN    56QFN    56QFN    56QFN    56QFN