UC3873C Datasheet PDF | Unisonic Technologies

Unisonic Technologies UC3873C

UC3873C is a high performance current mode PWM controller ideally suited for low standby power. The UTC UC3873C contains protection with automatic recovery including OLP (over load protection), OCP (cycle-by-cycle current limiting), and UVLO (VDD over voltage clamp and under voltage lockout). It also provides the protections including OTP (over temperature protection), OVP (over voltage protection) in UTC UC3873C with automatic recovery.

Part No.	UC3873C
Datasheet	UC3873C Download
Manufacturer	Unisonic Technologies
Description	LOW COST POWER-SAVING MODE PWM CONTROLLER
Buy	Stock & Price

DESCRIPTION

The UTC Low VDD startup current make the power reliable on startup design and a large value resistor could be used in the startup circuit to minimize the standby power. At no load condition, the IC operates in power-saving mode for lower standby power, decreasing frequency for Higher conversion efficiency at light load condition. To protect the power MOSFET, Gate-drive output is fixed up to 16V max. The internal slope compensation improves system stability at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch, which offering minimal external component count in the design. Excellent EMI performance is achieved with UTC proprietary frequency hopping technique (ZL201020615247.1) together with soft driver control. Audio noise is eliminated due to switch frequency more than 20kHz during operation. The UTC UC3873C has such applications as: battery charger, power adaptor, set-top box power supplies, ink jet printers, open-frame SMPS.