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UC3843BVD1G Datasheet(PDF) 10 Page - ON Semiconductor |
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UC3843BVD1G Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 21 page UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV http://onsemi.com 10 + − Reference Regulator VCC UVLO + − Vref UVLO 3.6V 36V S R Q Internal Bias + 1.0mA Oscillator 2.5V R R R 2R Error Amplifier Voltage Feedback Input Output/ Compensation Current Sense Comparator 1.0V VCC 7(12) GND 5(9) VC 7(11) Output 6(10) Power Ground 5(8) Current Sense Input 3(5) RS Q1 VCC Vin 1(1) 2(3) 4(7) 8(14) RT CT Vref = Sink Only Positive True Logic Pin numbers adjacent to terminals are for the 8−pin dual−in−line package. Pin numbers in parenthesis are for the D suffix SOIC−14 package. Figure 18. Representative Block Diagram Figure 19. Timing Diagram Large RT/Small CT Small RT/Large CT PWM Latch (See Text) Capacitor CT Latch Set" Input Output/ Compensation Current Sense Input Latch Reset" Input Output |
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