TPS61500PWP (TEXAS INSTRUMENTS)

The TPS61500PWP is a monolithic Switching Regulator with integrated 3A/40V power switch. It is an ideal driver for high brightness 1 or 3W LED. The device has a wide input voltage range to support application with input voltage from multi-cell batteries or regulated 5/12V power rails. The LED current is set with an external sensor resistor R3 and the feedback voltage that is regulated to 200mV by current mode PWM (pulse width modulation) control loop, as shown in the typical application. The device supports analogue and pure PWM dimming methods for LED brightness control. Connecting a capacitor to the DIMC pin configures the device to be used for analogue dimming and the LED current varies proportional to the duty cycle of an external PWM signal. Floating the DIMC pin configures the IC for pure PWM dimming with the average LED current being the PWM signals duty cycle times a set LED current.