The TPS61500 is a monolithic switching regulator with integrated 3-A, 40-V power switch.
It is an ideal driver for high brightness 1-W or 3-W LED. The device has a wide input voltage range
to support application with input voltage from multi-cell batteries or regulated 5-V or 12-V power
The LED current is set with an external sensor resistor R3, and the feedback voltage that
is regulated to 200 mV by current mode PWM (pulse width modulation) control loop, as shown in
Typical Application Circuit. The device supports analog and pure PWM
dimming methods for LED brightness control. Connecting a capacitor to the DIMC pin configures the
device to be used for analog dimming, and the LED current varies proportional to the duty cycle of
an external PWM signal. Floating the DIMC pin configures the device for pure PWM dimming with the
average LED current being the PWM signals duty cycle times a set LED current.
The device features a programmable soft-start function to limit inrush current during
start-up, and it has other built-in protection features, such as pulse-by-pulse overcurrent limit,
overvoltage protection, and thermal shutdown. The TPS61500 is available in 14-pin HTSSOP package
View datasheet View product folder