SE84140 is an integrated power switch supporting boost/buck/buck-boost DC-DC LED driver chip, with a wide input voltage range of 3V to 60V, integrated soft start, thereby minimizing external surge suppression components The demand makes it an ideal choice for LED drivers with a wide input power range. The output current can be adjusted by an external sampling resistor.
SE84140 has an integrated 350mΩ power switch, which can provide at least 1.5A input peak current capability, and has excellent load and line transient response. Equipped with SKIP control mode, which combines low quiescent current with high switching frequency to achieve high efficiency in a wide range of load current. Additional features include: soft start, thermal shutdown, UVLO under-voltage lockout, cycle-by-cycle current limit protection.
SE84140 can realize high-precision digital and analog adjustment of output current by selecting sampling resistor RSence of different resistance. SE84140 supports DC dimming of analog input (0.6V~1.2V) and PWM dimming of digital input (100HZ~1KHZ) .