HV311LG Supertex, HV311LG Datasheet - Page 11

• Manufacturer Part Number: HV311LG
• Description: Hot Swap & Power Distribution Active Low
• Manufacturer: Supertex

Specifications of HV311LG

• Package Type: SOIC N
• Operating Temperature (min): -40C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Industrial
• Product Depth (mm): 3.9mm
• Product Length (mm): 4.9mm
• Mounting: Surface Mount
• Pin Count: 8
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Lead Free Status / RoHS Status: Not Compliant

Application Circuit 6
Use with Negative Ground
The HV301 may be used with many positive ground systems where DC/DC PWM converters have isolated outputs and their
inputs need not be ground referenced.
Note:
Application Circuit 7
Extending Circuit Breaker Delay
Connecting a resistor in series with the SENSE pin and a capacitor between the SENSE and VEE pins as shown in the fol-
lowing diagram may be used to extend the circuit breaker delay time beyond the 5µs internally set delay time.
The time delay achievable by this method is limited since this Application Circuit 7 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 hot swap controller.
Note:
A capacitor may be needed to slow PWRGD dv/dt if gate oscillations are observed when V
A capacitor may be needed to slow PWRGD dv/dt if gate oscillations are observed when V
GND
-48V
+48V
6.81kΩ
9.76kΩ
6.81kΩ
9.76kΩ
●
GND
487kΩ
487kΩ
1235 Bordeaux Drive, Sunnyvale, CA 94089
R1
R2
R3
R1
R2
R3
10nF
2
3
3
2
C1
UV
OV
UV
OV
RAMP
RAMP
VDD
VDD
8
7
8
7
VEE
VEE
4
4
HV301
HV301
12.5mΩ
12.5mΩ
C2
R4
R4
11
SENSE GATE
SENSE GATE
5
5
R5
PWRGD
PWRGD
6
6
IRF530
IRF530
Q1
Q1
●
1
IN
IN
1
Tel: [phone]
is close to OV
is close to OV
C
C
DC/DC PWM CONVERTER
LOAD
LOAD
ENABLE
ENABLE
CONVERTER
DC/DC
LO
PWM
LO
.
.
●
www.supertex.com
+5V
COM
+5.0V
COM
HV301