HA16178P Datasheet, PDF (13/25 Pages) Renesas Technology Corp – Power Factor Correction Controller IC

HA16178P/FP
Description of Functions
1. UVL Circuit
The UVL circuit monitors the Vcc voltage. When the voltage is lower than 9.0 V, the IC is stopped. When the voltage
is higher than 10.5 V, IC is started.
When operation of the IC is stopped by the UVL circuit, the driver circuit output is fixed low, output of VREF is
stopped, and the oscillator is stopped.
VCC
10.5 V (VH)
9 V (VL)
VREF
5V
4.0 V
CAO
CT
OUT
Figure 1 UVL Operation
REJ03D0903-0100 Rev.1.00 Jun 12, 2007
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