TLC5948A Texas instruments

TLC5948A

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TLC5948A

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Описание

The TLC5948A is a 16-channel, constant-current sink LED 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 with other LED drivers. GS, DC, and BC data are accessible with a serial interface port. The TLC5948A 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 DC and BC Data:
- 2 mA to 45 mA (V_CC ≤ 3.6 V)
- 2 mA to 60 mA (V_CC > 3.6 V)
Dot Correction (DC):
- 7-Bit (128 Steps) with 0% to 100% Range
Global Brightness Control (BC):
- 7-Bit (128 Steps) with 25% to 100% Range
Grayscale Control (GS) with Enhanced Spectrum or Conventional PWM:
- 16-Bit (65,536 Steps)
LED Power-Supply Voltage: Up to 10 V
VCC: 3.0 V to 5.5 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	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
Analog dimming steps	128
Data transfer rate (typ) (MHz)	33
Ch to ch accuracy (typ) (±%)	1.5
Rating	Catalog
Operating temperature range (°C)	-40 to 85