HV301 SUTEX [Supertex, Inc], HV301 Datasheet - Page 15

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

Application Information, cont’d.
If a system requires the use of a short connector pin on the
negative supply lead to guarantee that the power pins are fully
mated before the hotswap control circuit is enabled and uses
separate resistor dividers for UV and OV, then a 6.2V to 10V
zener diode must be connected from the OV pin to the V
only the OV divider should be connected to the short pin
(Application Circuit 10).
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
-48V
GND
-48V
16.2kΩ
GND
475kΩ
-48V
IN
16.2kΩ
IN
Long
Pin
475kΩ
Long
Pin
is close to OV.
Short
Pin
R1
R2
is close to OV.
R1
R2
R3
511kΩ
R4
10kΩ
R3
511kΩ
R4
10kΩ
R6
EE
3
2
6.2V
pin and
3
2
UV
OV
RAMP
V DD
8
7
UV
OV
RAMP
V DD
8
7
C1
10nF
C1
10nF
V EE
4
15
V EE
4
12.5mΩ
HV301/
HV311
PWRGD / PWRGD
12.5mΩ
R5
HV301/
HV311
PWRGD / PWRGD
R5
SENSE GATE
Increasing Under Voltage Hysteresis
If the internally fixed under voltage hysteresis is insufficient for a
particular system application, then it may be increased by using
separate resistor dividers for OV and UV and providing a resistor
feedback path from the GATE pin to the UV pin (Application
Circuit 11).
5
SENSE GATE
5
6
IRF530
6
Q1
IRF530
Q1
1
1
Cload
ENABLE / ENABLE
Cload
ENABLE / ENABLE
CONVERTER
CONVERTER
DC/DC
PWM
DC/DC
PWM
Application Circuit 10
Application Circuit 11
+5V
COM
+5V
COM
HV301/HV311