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MC33065P-H Datenblatt(PDF) 11 Page - ON Semiconductor |
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MC33065P-H Datenblatt(HTML) 11 Page - ON Semiconductor |
11 / 14 page MC34065–H, L MC33065–H, L 11 MOTOROLA ANALOG IC DEVICE DATA Figure 25. Bipolar Transistor Drive Figure 26. Isolated MOSFET Drive Figure 27. Dual Charge Pump Converter The totem–pole outputs can furnish negative base current for enhanced transistor turn–off, with the addition of capacitor C1. IB + – 0 Base Charge Removal Vin C1 RS – + Q1 + _ + – – + + – 5.0Vref S R Q VCC Vin 16 PWM Latch 1 7 6 D1 NP NS C R Isolation Boundary I pk + V (Pin 6) * 1.4 3R S N P N S The capacitor’s equivalent series resistance must limit the Drive Output current to 400 mA. An additional series resistor may be required when using tantalum or other low ESR capacitors. The positive output can provide excellent line and load regulation by connecting the R2/R1 resistor divider as shown. Output Load Regulation IO (mA) +VO (V) –VO (V) 0 1.0 5.0 10 50 28.43 27.72 27.04 26.20 20.52 –13.89 –12.90 –12.25 –11.44 –5.80 – + + _ + _ – + + – – + + – – + + + + + 15 1 3 2 4 5 14 13 12 1.0nF 12k 2.5V R R Bias Osc. 5.0Vref 20k 1.0mA 1.0mA R 2R 1.0V EA2 89 S R R Q PWM Latch 2 S Q R PWM Latch 1 R 16 VCC = 15V + 47 27 10 7 47 6 10 11 47 R2 R1 +VO ≈ 2.0 VCC –VO ≈ –VCC 1N5819 1N5819 2R 250 µA 10 10 10 10 27 10 Connect to Pin 4 for closed–loop regulation. ) V O + 2.5 R 2 R 1 ) 1 EA1 1.0V |
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