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HSMC3842 Datasheet(PDF) 6 Page - Hi-Sincerity Mocroelectronics |
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HSMC3842 Datasheet(HTML) 6 Page - Hi-Sincerity Mocroelectronics |
6 / 10 page HI-SINCERITY MICROELECTRONICS CORP. Spec. No. : HP200202 Issued Date : 1998.08.01 Revised Date : 2002.12.03 Page No. : 6/10 H3842P HSMC Product Specification Application Information Open Loop Test Circuit Oscillator and Output Waveforms Error Amp Configuration Under Voltage Lockout RT CT 4 5 6 7 8 5V REG PWM Clock Oscillator Id Output GND CT Output Large RT / Small CT CT Output Small RT / Large CT Vcc 1 2 3 4.7KΩ 1KΩ 4.7KΩ 5KΩ 100KΩ RT 0.1uF 0.1uF CT 1W 1KΩ Error Amp. Adjust I Adjust HPN2222A COMP RT/CT V Vcc Output Ground Ground Output Vcc Vref 1 2 3 4 5 6 7 8 REF SENSE I SENSE VFB A H3842 High peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should be connected close to pin5 in a single point ground. The transistor and 5KΩ potentiometerare used to samplethe oscillator waveform and apply an adjustable ramp to pin3. Zi Zf V COMP 2.5V 1mA 1 2 FB + - ON/OFF Command Von Voff H3842 To Rest Of IC 16V 10V Icc <17mA <0.5mA Vcc Voff Von Vi 7 |
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