HV301 SUTEX [Supertex, Inc], HV301 Datasheet - Page 12

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

Application Information, cont’d.
When the details of the load ENABLE circuitry is not known,
using an optocoupler always provides a safe solution
(Application Circuit 4).
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
IN
IN
GND
-48V
is close to OV.
6.81kΩ
9.76kΩ
is close to OV.
GND
-48V
487kΩ
6.81kΩ
9.76kΩ
487kΩ
R1
R2
R3
R1
R2
R3
10nF
3
2
C1
UV
OV
RAMP
8
V DD
7
C2
3
2
UV
OV
RAMP
V DD
8
7
V EE
4
HV311
60mΩ
C1
10nF
PWRGD / PWRGD
R4
SENSE GATE
V EE
4
12
5
12.5mΩ
HV301/
HV311
R4
PWRGD / PWRGD
Filtering Voltage Spikes on Input Supply
In some systems over voltage spikes of very short duration may
exist. For these systems a small capacitor may be added from
the OV pin to the V
Circuit 5).
SENSE GATE
5
6
IRF530
Q1
1
6
IRF530
Q1
1
Cload
ENABLE / ENABLE
Optocoupler
EE
Cload
ENABLE / ENABLE
pin to filter the voltage spikes (Application
CONVERTER
DC/DC
CONVERTER
PWM
DC/DC
PWM
Application Circuit 4
Application Circuit 5
+5V
COM
+5V
COM
HV301/HV311