VN751S データシートの表示（PDF） - STMicroelectronics

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VN751S

High-side driver

STMicroelectronics 

VN751S

9

Active VDS clamp

Active VDS clamp

The active clamp is also known as the fast demagnetization of inductive loads or fast current

decay. When a high-side driver turns off an inductance, an undervoltage is detected on the

output.

The OUT pin is pulled down to Vdemag. The conduction state is modulated by internal

circuitry in order to keep the OUT pin voltage at about Vdemag until the load energy has been

dissipated. The energy is dissipated both in the IC internal switch and in load resistance.

Figure 10. Active clamp equivalent principle schematic

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DocID12320 Rev 9

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