Adjustable LED switchmode driver - 20-900mA

Nice little buck drivers which are adjustable from 20mA to 900mA using the onboard potentiometer. You can also control the output current using a PWM input signal, or use the PWM input as an enable input.

By default, the driver has a maximum output current of 900mA, but you can change this by adjusting the resistance Rcs. Just parallel a low value resistor across it to set the maximum output current, up to 1200mA max. Iout is calculated using the formula 0.1/Rcs. For example, with the default 0.11 ohm resistor for Rcs, the output current is 0.1/0.11=0.91A.

Specifications
Working voltage: DC 6-25V DC
Output current: 20-900mA (1200mA max)
Maximum output power: 20W
Open-circuit LED protection
High efficiency (up to 97%)
Dimensions: 28 x 20 x 16mm (not including pot knob)

Uses the PT4115 LED driver IC.