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LD7577 Datasheet(PDF) 3 Page - Leadtrend Technology |
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LD7577 Datasheet(HTML) 3 Page - Leadtrend Technology |
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3 / 18 page  LD7577 3 Leadtrend Technology Corporation www.leadtrend.com.tw LD7577-DS-01 January 2009 Block Diagram COMP CS OUT internal bias & Vref GND PWM Comparator Green Mode Control Leading Edge Blanking 2R R R SQ Vref OK PG + + Slope Compensation 28.0V VCC 0.85V 30 mS Delay 5.0V OCP Comparator OLP Comparator Protection OVP UVLO Comparator OVP Comparator VCC OK Vbias 32V All Blocks 65 KHz OSC BNO 1. 05V/0. 95V Brownout Comparator PDR 8.0V OLP OVP BNOUT R SQ Protection PG PG 1/ 2 Counter R S Q OLP 1mA HV PDR 4.0V/3.8V Line OVP Line OVP Comparator 16.0V/ 10.0V Driver Stage |
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