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.
PowerPAD is a trademark of Texas Instruments.
| Features |
| Analog Dimming Steps |
| Data Transfer Rate (Typ) (MHz) |
| Ch to Ch Accuracy (Typ) (+/- %) |
| Rating |
| Operating Temperature Range (C) |
| Pin/Package |
| TLC5945 | TLC5940 | TLC59401 | TLC5941 | TLC5943 | TLC5944 | TLC5946 | TLC59461 | TLC59482 | TLC5948A | TLC5949 |
|---|---|---|---|---|---|---|---|---|---|---|
|
Dot Correction Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good |
Dot Correction Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good |
Dot Correction Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good |
Dot Correction Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good |
Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good Thermal Shutdown |
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 |
Dot Correction Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good |
Dot Correction Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good |
PWM LED Driver |
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 |
Error Flag Fault Detection LED Open Detection LED Short to Ground Detection LED Short to VLED Detection PWM LED Driver Power Good Thermal Shutdown |
| 64 | 64 | 64 | 64 | 128 | 64 | 64 | 64 | 64 | 128 | 128 |
| 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 33 | 33 | 33 |
| 1 | 1 | 1 | 1 | 1.5 | 1 | 1 | 1 | 1 | 1.5 | 0.6 |
| Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog | Catalog |
| -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 | -40 to 85 |
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28HTSSOP 32VQFN |
28HTSSOP 32VQFN |
28HTSSOP 32VQFN |
28HTSSOP 32VQFN |
28HTSSOP 32VQFN |
28HTSSOP 32VQFN |
28HTSSOP 28TSSOP 32VQFN |
28HTSSOP | 24SSOP |
24HTSSOP 24SSOP |
24HTSSOP 24SSOP |
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