TPS61196 Description
The TPS61196 provides a highly integrated solution for LCD TV backlight with an independent PWM dimming function for each string. This device is a current mode boost controller driving up to six WLED strings with multiple LEDs in series. Each string has an independent current regulator providing a LED current adjustable from 50 mA to 400 mA within ±1.5% matching accuracy.
TPS61196 Key Features
- 1 8-V to 30-V Input Voltage
- Up to 120-V Output Voltage
- 100-KHz to 800-kHz Programmable Switching Frequency
- Adaptive Boost Output for LED Voltages
- Six Current Sinks, 200-mA Continuous Output, 400-mA Pulse Output for Each String
- ±1.5% Current Matching Between Strings
- High Precision PWM Dimming Resolution up to 5000:1
- Programmable Overvoltage Threshold at Output and Each Current Sink
- Programmable Undervoltage Threshold at Input with Adjustable Hysteresis
- Adjustable Soft Start Time Independent of Dimming Duty Cycle