HA16138PS Datasheet, PDF (17/20 Pages) Hitachi Semiconductor – AC/DC Switching Converter Controller IC With High-Voltage Power MOS FET

HA16138PS
Application Circuit Examples 3
As this IC is provided with a remote on/off function, it is possible to implement power management
without turning off the power supply. Using a remote on/off control circuit as shown in the figure below,
the CT pin voltage is pulled up to the off mode start voltage or above, and the IC is stopped. In the off
mode, control of PWM output stoppage, soft start resistance resetting, and starter circuit stoppage is
performed without stopping the internal reference voltage generation circuit. With this function, also, latch
operation is not performed, and an auto-restart is executed as soon as the CT pin voltage falls below the off
mode start voltage. It is recommended that the remote on/off control signal be controlled by a
microcomputer or other logic signal.
Remote ON/OFF control circuit
HA16138PS
1 DRAIN SOURCE 8
2 DRAIN SGND 7
3 VDD
CT 6
4 FB
COMP 5
R2
43k
2SA1029
R1
R3
10k
130k
CT
220p
R4
10k
2SC458
ON/OFF
H: OFF
L: ON
Units R: Ω
C: F
17