TLC5949 Texas instruments

TLC5949

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TLC5949

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Описание

The TLC5949 is a 16-channel, constant-current sink LED driver. Each channel has an individually-adjustable, pulse width modulation (PWM) grayscale (GS) brightness control with 4096 steps. All channels have a 128-step global brightness control (BC). BC adjusts brightness deviation with other LED drivers. GS and BC data are accessible with a serial interface port. The TLC5949 has six error flags: LED open detection (LOD), LED short detection (LSD), output leakage detection (OLD), reference current terminal short flag detection (ISF), pre-thermal warning (PTW), and thermal error flag (TEF). The error detection results can be read with a serial interface port.

16 Constant-Current Sink Output Channels
Sink Current Capability with
Maximum BC Data: 2 mA to 45 mA
Global Brightness Control (BC):
- 7-Bit (128 Steps) with 25% to 100% Range
Grayscale Control (GS) with Enhanced Spectrum or Conventional PWM:
- 12-Bit (4096 Steps)
LED Power-Supply Voltage: Up to 10 V
VCC: 3.0 V to 3.6 V
Constant-Current Accuracy:
- Channel-to-Channel: ±0.6% (typ), ±2% (max)
- Device-to-Device: ±1% (typ), ±4% (max)
Data Transfer Rate: 33 MHz
Grayscale Control Clock: 33 MHz
Auto Display Repeat and Auto Data Refresh
Display Timing Reset
Power-Save Mode to Minimize VCC Current
LOD and LSD with Invisible Detection
Mode (IDM)
Output Leakage Detection (OLD)
Current Reference Terminal Short Flag (ISF)
Thermal Shutdown (TSD) and Error Flag (TEF)
Pre-Thermal Warning (PTW)
Four-Channel Grouped Delay Switching to Prevent Inrush Current
Operating Temperature: –40°C to +85°C

Features	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	128
Data transfer rate (typ) (MHz)	33
Ch to ch accuracy (typ) (±%)	0.6
Rating	Catalog
Operating temperature range (°C)	-40 to 85