UC3973 Description
The UC3973 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 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...
UC3973 Key Features
- UTC proprietary frequency hopping technology for Improved EMI performance
- Power-saving mode for high light-load and standby efficiency
- Soft Start
- Dynamic peak current limiting for constant output power
- Built-in synchronized slope pensation
- OLP,OVP and VDD clamp for higher security
- Programming OTP for higher security
- Fixed switch frequency 65kHz
- Gate output voltage clamped at 15V
- Low start-up current