This is a mini flasher board that can drive high-power LED or a lamp, mainly designed for automotive applications. The project consists BD9555FVM-C timer chip and MOSFET. The circuit is configured as a flasher, and can also be used as a PWM driver with an adjustable duty cycle and frequency. Capacitors C2, R4, and PR1 can be used to set the duty cycle. Please refer to the datasheet of BD9555FVM for more information. N-channel IRF7862 MOSFET used to drive the load, and it’s advisable to use maximum load current 3A due to small thermal dissipation on PCB for the MOSFET. The operating power supply is 5V to 15V<strong>DC</strong>.
Features
- Power Supply 5V to 15V DC
- Load Up to 3A
- Flash Frequency 2Hz to 10 Hz
- PWM Frequency range 1Hz to 10Khz (PR1, R4 and C2)
- Adjustable Duty Cycle 1% to 99% (PR1, R4 and C2)
- PCB Dimensions 22.07 x 10.95 mm
Connections
- CN1: Pin 1 = +DC 5V to 15V, Pin 2 = GND
- CN2: Pin 1 = +DC, Pin 2 = Load
- PR1: Frequency Adjust
- D1: Power LED
Schematic