UTC3521 データシートの表示（PDF） - Unisonic Technologies
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UTC3521 Datasheet PDF : 6 Pages
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3521
FUNCTION DESCRIPTION
(1) REMOTE ON/OFF
REM
REMONF
trem
trem
CMOS IC
REMON
toff
toff
(2) Under Voltage Protection Delay Time
REM
REMONF
trem
UVP
td,uvp
(3) Pulse Width Modulation
The output pulse width modulation is generated by comparison of the saw-tooth waveform from the capacitor CT
to the feedback of the voltage.
Therefore, an increase in feedback control signal amplitude causes a linear decrease of the output pulse width.
(4) 0Protection Control of the Soft-Start
The soft-start function is to reduce the large current surge during power-up or preventing the output voltages
(V33/V5/V12) reaches the Over Voltage Protection level.
(5) The function of PT
This signal is prepared for extra Over Voltage Protection Input (VPT>1.25V) or another Disable Under Voltage
Protection function (VPT<0.62V).
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 6
QW-R502-034. D
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