HV301 SUTEX [Supertex, Inc], HV301 Datasheet - Page 19

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

Application Information cont’d.
Extending Circuit Breaker Delay
Connecting a resistor in series with the SENSE pin and a
capacitor between the SENSE and V
following diagram may be used to extend the Circuit Breaker
delay time beyond the 5µs internally set delay time (Application
Circuit 15).
The time delay achievable by this method is limited since this
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
IN
GND
-48V
is close to OV.
EE
6.81kΩ
9.76kΩ
487kΩ
pins as shown in the
R1
R2
R3
3
2
UV
OV
RAMP
8
V DD
7
V EE
4
12.5mΩ
19
HV301/
HV311
PWRGD / PWRGD
C2
R4
SENSE GATE
5
delay circuit will also effect the current control feedback loop and
will result in a current overshoot during the external pass device
turn on transition to current limit. If the time delay required for the
Circuit Breaker causes excessive current overshoot during the
turn on transition then the following circuit may be used, where
the RC filter is switched on after the completion of the current
limit control function of the hotswap controller.
R5
6
IRF530
Q1
1
Cload
ENABLE/ ENABLE
CONVERTER
DC/DC
PWM
Application Circuit 15
+5V
COM
HV301/HV311