參數(shù)資料
型號(hào): HV301
廠商: Supertex, Inc.
英文描述: Hotswap, Controllers with Circuit Breaker
中文描述: 熱插拔控制器與斷路器
文件頁數(shù): 16/21頁
文件大小: 664K
代理商: HV301
16
HV301/HV311
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
DD
pin.
Application Information, cont’d.
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.
Application Circuit 12
VDD
UV
OV
VEE
4
SENSE GATE
RAMP
-48V
R4
12.5m
R1
487k
R2
6.81k
R3
9.76k
Q1
IRF530
Cload
+5V
HV311
8
3
2
5
7
COM
1
GND
C1
10nF
D1
6
DC/DC
PWM
CONVERTER
PWRGD / PWRGD
ENABLE / ENABLE
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when V
IN
is close to OV.
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