UC3873B
DESCRIPTION
The UC3873B is a high performance current mode PWM controller ideally suited for low standby power. Low VDD startup current make the power reliable on startup design and a large
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SOT-26 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.
The UC3873B contains protection with automatic recovery including OLP (over load protection), programming OTP (over temperature protection), OVP (over voltage protection), UVLO (VDD over voltage clamp and under voltage lockout).To protect the power MOSFET, Gate-drive output is fixed up to 16V max. The UC3873B contains protection
OCP (cycle-by-cycle current limiting).
The internal slope pensation improves system stability at high PWM duty cycle output. Leading-edge blanking on current sense input removes the signal glitch, which...
