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UC3842A Datasheet(PDF) 5 Page - ON Semiconductor |
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UC3842A Datasheet(HTML) 5 Page - ON Semiconductor |
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5 / 18 page  UC3842A, UC3843A, UC2842A, UC2843A http://onsemi.com 5 Figure 2. Timing Resistor versus Oscillator Frequency Figure 3. Output Deadtime versus Oscillator Frequency Figure 4. Oscillator Discharge Current versus Temperature Figure 5. Maximum Output Duty Cycle versus Timing Resistor Figure 6. Error Amp Small Signal Transient Response Figure 7. Error Amp Large Signal Transient Response 0.5 ms/DIV VCC = 15 V AV = −1.0 TA = 25°C 10 k 20 k 50 k 100 k 200 k 500 k 1.0 M fOSC, OSCILLATOR FREQUENCY (Hz) VCC = 15 V TA = 25°C 10 k 20 k 50 k 100 k 200 k 500 k 1.0 M fOSC, OSCILLATOR FREQUENCY (Hz) VCC = 15 V TA = 25°C −55 −25 0 25 50 75 100 125 TA, AMBIENT TEMPERATURE (°C) VCC = 15 V VOSC = 2.0 V RT, TIMING RESISTOR (W) 800 1.0 k 2.0 k 3.0 k 4.0 k 6.0 k 8.0 k VCC = 15 V CT = 3.3 nF TA = 25°C Idischg = 9.5 mA Idischg = 7.2 mA 2.55 V 2.5 V 2.45 V VCC = 15 V AV = −1.0 TA = 25°C 0.1 ms/DIV 2.5 V 3.0 V 2.0 V 80 50 20 8.0 5.0 2.0 0.8 100 50 20 10 5.0 2.0 1.0 9.0 8.5 8.0 7.5 7.0 100 90 80 70 60 50 40 |
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