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IPS161HF 数据表(PDF) 16 Page - STMicroelectronics

部件名 IPS161HF
功能描述  Single channel high-side switches
PDF  27 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

IPS161HF 数据表(HTML) 16 Page - STMicroelectronics

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7
Active VDS clamp
Active clamp is also known as fast demagnetization of inductive loads or fast current decay. When a high-side
driver turns off an inductance, an undervoltage is detected on 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 the load resistance.
Figure 10. Active clamp equivalent principle schematic
OUT
GND
SUPPLY RAIL
GROUND PLANE
APPLICATION BOARD
IC
L LOAD
Clamp
circuitry
VCC
EXPOSED PAD
IPS160HF, IPS161HF
Active VDS clamp
DS13271 - Rev 2
page 16/27



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