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UC3842BN 데이터시트(PDF) 9 Page - Motorola, Inc |
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UC3842BN 데이터시트(HTML) 9 Page - Motorola, Inc |
9 / 16 page UC3842B, 43B UC2842B, 43B 9 MOTOROLA ANALOG IC DEVICE DATA + – 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 SO–14 package. Figure 17. Representative Block Diagram Figure 18. 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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