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USRB01G-S08-R датащи(PDF) 6 Page - Unisonic Technologies |
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USRB01G-S08-R датащи(HTML) 6 Page - Unisonic Technologies |
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6 / 7 page ![]() USRB01 Preliminary ` LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 6 of 7 www.unisonic.com.tw QW-R103-080.b OPERATION DESCRIPTION (Cont.) Drive BJT The driver is a push pull stage with the supply voltage VDD. It provides the driving current for the external power bipolar transistor. The output signal is current-limited to IOUT(SOURCE). Protection Control Good power supply system reliability is achieved with its comprehensive protection features including VDD over voltage protection, OTP, feedback loop open protection, Cycle-by-cycle current limiting, short circuit protection, leading edge blanking and UVLO, etc. VDD is supplied by transformer auxiliary winding output. The output of UTC USRB01 is shutdown when VDD drops below VTH(OFF) and the power converter enters power on start-up sequence thereafter. |
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