Application Information cont’d.
Latched Operation
For those applications that need to disable the automatic retry
capability, the following circuit disables the auto retry feature.
HV301/HV311
GND
R1
487kΩ
R2
6.81kΩ
R3
9.76kΩ
8
VDD
PWRGD / PWRGD
1
3 UV
2 OV
HV301 / HV311
VEE SENSE GATE RAMP
4
5
6
7
ENABLE / ENABLE
Cload
DC/DC
PWM
CONVERTER
+5V
COM
2.5MΩ
-48V
R4
12.5mΩ
Q1
IRF530
Note: capacitor may be needed to slow PWRGD dv/dt if
oscillations are observed when VIN is close to OV.
Application Circuit 17
20