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IPS2050H Fiches technique(PDF) 17 Page - STMicroelectronics

No de pièce IPS2050H
Description  High efficiency, high-side switch with extended diagnostics and smart driving for capacitive loads
PDF  32 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

IPS2050H Fiches technique(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 12. Active clamp equivalent principle schematic
OUTX
VCC
GND
RPD
SUPPLY RAIL
GROUND PLANE
APPLICATION BOARD
IC
.
.
.
.
.
.
LLOAD
Figure 13. Typical demagnetization energy (single pulse, two channels driven simultaneously) at VCC = 24
V and TAMB = 125 °C
IPS2050H, IPS2050H-32, IPS2050HQ, IPS2050HQ-32
Active clamp
DS13779 - Rev 3
page 17/32



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