TPS61043 Overview
The TPS61043 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 (typical). To control LED brightness, the LED current can be pulsed by applying a PWM (pulse width modulated) signal with a...
TPS61043 Key Features
- 1 Current Source With 18-V Overvoltage Protection
- Powers up to 4 LEDs in Series
- 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 400 mA
- Disconnects LEDs During Shutdown
- No Load Quiescent Current 38 µA Typical
TPS61043 Applications
- White LED Supply for Display Backlight and Sidelight in