HV301 SUTEX [Supertex, Inc], HV301 Datasheet - Page 10

• Manufacturer Part Number: HV301
• Description: Hotswap, Controllers with Circuit Breaker
• Manufacturer: SUTEX [Supertex, Inc]

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
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
6.81kΩ
9.76kΩ
487kΩ
GND
-48V
R1
R2
R3
IN
is close to OV.
10nF
3
2
C1
UV
OV
RAMP
8
V DD
7
V EE
HV311
4
12.5mΩ
R4
SENSE
5
10
PWRGD
GATE
6
IRF530
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
Q1
1
Cload
+
-
EE
pin of the HV311.
ENABLE
CONVERTER
DC/DC
Application Circuit 1
PWM
+5V
COM
HV301/HV311