Linear Technology's pulse width modulation generator is suitable for LED control
Linear Technology
LT8500 pulse width modulation generator
The LT8500 48-channel pulse width modulation (PWM) generator from Linear Technology is suitable for LED control — including large-screen LED back-lighting — and industrial and robotic applications.
The unit features 48 independent PWM outputs that have adjustable PWM registers and a TTL/CMOS 50MHz serial data interface for programming controls, such as correction and grey-scale dimming for LED applications. The serial data interface also includes buffering and skew balancing.
Additionally, two diagnostic information flags are provided by the generator — synchronisation error and open LED — which offer additional state information when read on the serial data interface.
Click here for more information on the LT8500.
Key specifications
- Accepts input voltage of 3-5.5V
- 12-bit (4,096 steps) PWM register per channel
- Each channel also has a 6-bit (63 step) ±50 per cent correction register
- Up to 6.1kHz PWM frequency
- Offered in a 5 x 9 x 0.75mm QFN package
- 6-bit dot-correction current adjustment
- 12-bit grey-scale PMW dimming
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