具有點校正與灰度 PWM 控制功能且無延遲的 16 通道 LED 驅(qū)動器
| 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 |
| Analog dimming steps | 64 |
| Data transfer rate (Typ) (MHz) | 30 |
| Ch to ch accuracy (Typ) (+/- %) | 1 |
| Rating | Catalog |
| Operating temperature range (C) | -40 to 85 |
- 16 Channels
- 12-bit (4096 Steps) Grayscale PWM Control
- Dot Correction
- 6 bit (64 Steps)
- Drive Capability (Constant-Current Sink)
- 0 mA to 80 mA
- LED Power Supply Voltage up to 17 V
- VCC = 3.0 V to 5.5 V
- Serial Data Interface
- 30-MHz Data Transfer Rate
- CMOS Level I/O
- Error Information
- LOD: LED Open Detection
- TEF: Thermal Error Flag
- APPLICATIONS
- Monocolor, Multicolor, Full-Color LED Displays
- LED Signboards
- Display Back-lighting
PowerPAD is a trademark of Texas Instruments.
The TLC5945 is a 16-channel, constant-current sink, LED driver. Each channel has an individually adjustable 4096-step grayscale PWM brightness control and a 64-step constant-current sink (dot correction). The dot correction adjusts the brightness variations between LED channels and other LED drivers. Both grayscale control and dot correction are accessible via a serial interface. A single external resistor sets the maximum current value of all 16 channels.
The TLC5945 features two error information circuits. The LED open detection (LOD) indicates a broken or disconnected LED at an output terminal. The thermal error flag (TEF) indicates an overtemperature condition.
