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UC2845A Fiches technique(PDF) 9 Page - STMicroelectronics |
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UC2845A Fiches technique(HTML) 9 Page - STMicroelectronics |
9 / 16 page 9/16 UC384XA - UC284XA Figure 21. Isolated MOSFET Drive and Current Transformer Sensing. Figure 22. Latched Shutdown. 7 6 COMP/LATCH ISOLATION BOUNDARY D95IN349 5.0Vref VCC + - + - Q S R 3 R RS NS C Vin Q1 NP VGS Waveforms + 0 + 0 - - 50% DC 25% DC Ipk = V(pin 1) -1.4 3RS NS NP () D95IN350 BIAS + - EA R + OSC 2N 3905 2N 3903 1mA R R 2R 1 2 8 4 SCR must be selected for a holding current of less than 0.5mA at TA(min). The simple two transistor circuit can be used in place of the SCR as shown. All resistors are 10K. 5 |
Numéro de pièce similaire - UC2845A |
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Description similaire - UC2845A |
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