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A6986F Arkusz danych(PDF) 33 Page - STMicroelectronics

Numer części A6986F
Szczegółowy opis  38 V 1.5 A synchronous step-down switching regulator
PDF  72 Pages
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Producent  STMICROELECTRONICS [STMicroelectronics]
Strona internetowa  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

A6986F Arkusz danych(HTML) 33 Page - STMicroelectronics

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A6986F
Functional description
72
Figure 24. Peak current sense operation in overcurrent condition
The DC current flowing in the load in overcurrent condition is:
Equation 17
OCP and switchover feature
Output capacitor discharging the current flowing to ground during heavy short-circuit events
is only limited by parasitic elements like the output capacitor ESR and short-circuit
impedance.
Due to parasitic inductance of the short-circuit impedance, negative output voltage
oscillations can be generated with huge discharging current levels (see Figure 25).
IDCOC VOUT

IMAX
IRIPPLE VOUT

2
----------------------------------------
–
IMAX
VIN VOUT
–
2L
------------------------------ TON


–
==



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