전자부품 데이터시트 검색엔진 |
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UC2843AQD8RQ1 데이터시트(PDF) 7 Page - Texas Instruments |
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UC2843AQD8RQ1 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 11 page APPLICATION INFORMATION Oscillator Frequency vs Timing Resistance Maximum Duty Cycle vs Timing Resistor V REF V CC OUTPUT GND C T 1 kW 1 W 0.1 µF 0.1 µF R T 2N2222 5 k I Adjust W SENSE 4.7 kW 4.7 kW 1 k Error Amp Adjust W COMP UC2843A V FB I SENSE R /C T T GND OUTPUT V CC V REF 100 kW 1 2 3 4 5 6 7 8 UC2843A-Q1 www.ti.com........................................................................................................................................................................................................ SGLS384 – MAY 2008 Figure 6. Oscillator A. High peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should be connected close to pin 5 in a single point ground. The transistor and 5k potentiometer are used to sample the oscillator waveform and apply an adjustable ramp to pin 3. Figure 7. Open-Loop Laboratory Text Fixture Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): UC2843A-Q1 |
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