TPS61042 Description
The TPS61042 is a high frequency boost converter with constant current output that drives white LEDs or similar. The LED current is set with the external sense resistor (RS) and is directly regulated by the feedback pin (FB) that regulates the voltage across the sense resistor RS to 252 mV (typ). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a...
TPS61042 Key Features
- 1 Current Source With Overvoltage Protection
- Input Voltage Range: 1.8 V to 6 V
- Internal 30 V Switch
- Up to 85% Efficiency
- Precise Brightness Control Using PWM Signal or
- Switching Frequency: Up to 1 MHz
- Internal Power MOSFET Switch: 500 mA
- Disconnects LEDs During Shutdown
- No Load Quiescent Current: 38 µA Typ
- Shutdown Current: 0.1 µA Typ
TPS61042 Applications
- White LED Supply for Backlight/Sidelight Displays