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UC1103 Scheda tecnica(PDF) 8 Page - Unisonic Technologies |
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UC1103 Scheda tecnica(HTML) 8 Page - Unisonic Technologies |
8 / 9 page UC1103 Preliminary CMOS IC UNISONICTECHNOLOGIESCO.,LTD 8 of 9 www.unisonic.com.tw QW-R502-961.d OPERATION DESCRIPTION(Cont.) Gate Output The UTC UC1103 output stage is a fast totem-pole gate driver. Cross conduction has been avoided to minimize heat dissipation, increase efficiency, and enhance reliability. The output driver is clamped at 15V to protect power MOSFET transistors against undesired over-voltage gate signals. Protection Control Good power supply system reliability is achieved with its comprehensive protection features including VDD over-voltage protection, VDD Clamp, GATE Clamp, Power on soft start, Cycle-by-cycle current limiting, short circuit protection, leading edge blanking, OTP and UVLO, etc. VDD is supplied by transformer auxiliary winding output. The output of UTC UC1103 is shutdown when VDD drops below VTH(OFF) and the power converter enters power on start-up sequence thereafter. |
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