HV301 SUTEX [Supertex, Inc], HV301 Datasheet - Page 16

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

Application Information, cont’d.
Reverse Polarity Protection
The UV and OV pins are protected against reverse polarity input
supplies by internal clamping diodes and the fault currents are
sufficiently limited by the impedance of the external resistor
divider, however, a low current diode with a 100V breakdown
rating must be inserted in series with the V
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
IN
is close to OV.
GND
-48V
6.81kΩ
9.76kΩ
487kΩ
DD
R1
R2
R3
pin.
10nF
3
2
C1
OV
UV
RAMP
8
V DD
7
D1
V EE
4
16
12.5mΩ
HV311
PWRGD / PWRGD
R4
SENSE GATE
This method (shown in Application Circuit 12) will protect the
hotswap control circuit however, due to the intrinsic diode in the
external MOSFET, the load will not be protected from reverse
polarity voltages.
5
6
IRF530
Q1
1
Cload
ENABLE / ENABLE
CONVERTER
DC/DC
PWM
Application Circuit 12
+5V
COM
HV301/HV311