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HV311 Datasheet(PDF) 10 Page - Supertex, Inc

Part # HV311
Description  Hotswap, Controllers with Circuit Breaker
Download  21 Pages
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Manufacturer  SUTEX [Supertex, Inc]
Direct Link  http://www.supertex.com
Logo SUTEX - Supertex, Inc

HV311 Datasheet(HTML) 10 Page - Supertex, Inc

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10
HV301/HV311
Application Circuit 1
PWRGD Output
It is critical to have a detailed understanding of the ENABLE input
circuitry of the load (DC/DC PWM Converter) in order to make
the correct choice between the HV301 or HV311.
Many DC/DC PWM Converters reference their ENABLE inputs
to the negative input terminal. If the ENABLE input is active LOW
then the HV311 can be directly connected as shown below
(Application Circuit 1) since the open drain PWRGD output is
in a High-Z state until the external MOSFET is fully turned on and
the potential on the negative input of the converter is essentially
the same as the V
EE pin of the HV311.
VDD
UV
OV
VEE
SENSE
GATE
RAMP
-48V
R4
12.5m
R1
487k
R2
6.81k
R3
9.76k
Q1
IRF530
Cload
+5V
HV311
8
3
2
COM
1
GND
C1
10nF
+
-
DC/DC
PWM
CONVERTER
PWRGD
ENABLE
5
74
6
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
IN is close to OV.


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