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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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UM1557 데이터시트(PDF) 49 Page - STMicroelectronics |
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UM1557 데이터시트(HTML) 49 Page - STMicroelectronics |
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49 / 111 page  UM1557 Switching inductive loads Doc ID 023521 Rev 2 49/111 External clamping circuitry examples Table 7. External clamping circuitry examples(1/2) External clamping circuitry + – 1) Freewheeling diode and reverse battery diode) Low cost Load is reverse battery protected Only for small loads (voltage drop and power dissipation on reverse battery protection diode Dr) Slow demagnetization 2) Transil and diode (in parallel with the load) Fast demagnetization Load is reverse battery protected Only for small loads (voltage drop and power dissipation on reverse battery protection diode Dr ) 3) Freewheeling diode and reverse battery FET Load is reverse battery protected Low peak power dissipation on D during demag. phase Suitable for high current inductive loads such as DC motors High number of ext. components (cost) Slow demagnetization L R Vbat GND OUT Rgnd Dgnd GND GND Clamp Vout Iout GND D Dr L R GND OUT Rgnd Dgnd GND GND Clamp Vout Iout T D GND Dr L R Vbat GND OUT Rgnd Dgnd GND GND Clamp Iout GND D PMOS 4k7 15V GND |
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