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UC3843BDG データシート(PDF) 5 Page - ON Semiconductor |
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UC3843BDG データシート(HTML) 5 Page - ON Semiconductor |
5 / 21 page UC3842B, UC3843B, UC2842B, UC2843B, NCV3843BV http://onsemi.com 5 0.8 2.0 5.0 8.0 20 50 80 1.0 M 500 k 200 k 100 k 50 k 20 k 10 k fOSC, OSCILLATOR FREQUENCY (kHz) VCC = 15 V TA = 25°C Figure 2. Timing Resistor versus Oscillator Frequency Figure 3. Output Deadtime versus Oscillator Frequency 1.0 M 500 k 200 k 100 k 50 k 20 k 10 k fOSC, OSCILLATOR FREQUENCY (kHz) 1.0 2.0 5.0 10 20 50 100 1 2 Figure 4. Oscillator Discharge Current versus Temperature Figure 5. Maximum Output Duty Cycle versus Timing Resistor 7.0 −55 TA, AMBIENT TEMPERATURE (°C) −25 0 25 50 75 100 125 7.5 8.0 8.5 9.0 VCC = 15 V VOSC = 2.0 V 40 0.8 RT, TIMING RESISTOR (kW) 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 50 60 70 80 90 100 Idischg = 7.5 mA VCC = 15 V CT = 3.3 nF TA = 25°C 1. CT = 10 nF 2. CT = 5.0 nF 3. CT = 2.0 nF 4. CT = 1.0 nF 5. CT = 500 pF 6. CT = 200 pF 7. CT = 100 pF 5 Idischg = 8.8 mA 7 3 6 4 VCC = 15 V TA = 25°C Figure 6. Error Amp Small Signal Transient Response Figure 7. Error Amp Large Signal Transient Response 1.0 ms/DIV 0.5 ms/DIV 2.55 V 2.50 V 2.45 V 3.0 V 2.5 V 2.0 V VCC = 15 V AV = −1.0 TA = 25°C VCC = 15 V AV = −1.0 TA = 25°C Where: Vosc = 1.7 V IRt = Vref/Rt Idis = 8.3 mA Freq + 1 Ct Vosc IRt ) Ct Vosc Idis *IRt |
同様の部品番号 - UC3843BDG |
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同様の説明 - UC3843BDG |
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