TLC59291 Texas instruments

TLC59291

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TLC59291

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Описание

The TLC59291 is a 8/16-channel constant current sink LED driver. Each channel can be turned on-off by writing data to an internal register. The constant current value of all 16 channels is set by a single external resistor and 128 steps for the global brightness control (BC). The TLC59291 has six type error flags: LED open detection (LOD), LED short detection (LSD), output leak detection (OLD), reference terminal short detection (ISF), Pre thermal warning (PTW) and thermal error flag (TEF). In addition, the LOD and LSD functions have invisible detection mode (IDM) that can detect those errors even when the output is off. The error detection results can be read via a serial interface port. The TLC59291 has low quiescent current in normal mode, it also has a power-save mode that sets the total current consumption to 10 µA (typical) when all outputs are off.

8/16 Constant-Current Sink Output Channels with
On/Off Control
Current Capability:
- 1 – 40 mA (V_CC ≤ 3.6 V)
- 1 – 50 mA (V_CC > 3.6 V)
Global Brightness Control: 7-Bit (128 Steps)
Power-Supply Voltage Range: 3 V to 5.5 V
LED Power-Supply Voltage: Up to 10 V
Constant-Current Accuracy:
- Channel-to-Channel = ±3% (Typical)
- Device-to-Device = ±2% (Typical)
Low Quiescent Current
SOUT can be Configured for 8-Channel or 16-
Channel Output
LED Open Detection (LOD)/LED Short Detection
(LSD) with Invisible Detection Mode (IDM)
Output Leakage Detection (OLD) Detects 3 µA
Leak
Pre-Thermal Warning (PTW)
Thermal Shutdown (T_SD)
Current Reference Terminal Short Flag (ISF)
Power-Save Mode with 10-µA Consumption
Undervoltage Lockout Sets the Default Data
2-ns Delayed Switching Between Each Channel
Minimizes 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, ON/OFF LED Driver, Power good, Thermal shutdown
Analog dimming steps	128
Data transfer rate (typ) (MHz)	33
Ch to ch accuracy (typ) (±%)	1
Rating	Catalog
Operating temperature range (°C)	-40 to 85