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IPS1025HFQ Datasheet(PDF) 17 Page - STMicroelectronics

Part # IPS1025HFQ
Description  High efficiency, high-side switch with extended diagnostics, smart driving for capacitive loads and short propagation delay at power-on
PDF  32 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

IPS1025HFQ Datasheet(HTML) 17 Page - STMicroelectronics

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8
Active 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 under-voltage on output is detected.
The OUT pin is pulled-down to VCC-VDEMAG. The conduction state is modulated by an internal circuitry in order to
keep the OUT pin voltage at ~VDEMAG until the load energy has been dissipated. The energy is dissipated in both
IC internal switch and load resistance.
Figure 11. Active clamp equivalent principle schematic
OUT
VCC
PGND
RPD
SUPPLY RAIL
GROUND PLANE
APPLICATION BOARD
IC
.
.
.
.
.
.
LLOAD
Figure 12. Typical demagnetization energy (single pulse) at VCC = 24 V and TAMB = 125 °C
IPS1025HF, IPS1025HFQ
Active clamp
DS13869 - Rev 3
page 17/32



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