Data Sheet G14309EJ2V0DS00

16

µµµµPC1909

3.4 On/Off Operation

The output of OUT1 and OUT2 can be made low level (off) by making the voltage of the ON/OFF pin low level. This

also causes discharge of the soft start capacitor externally connected to the DTC1 pin and the timing capacitor externally

connected to the CT pin.

To prevent chattering when turning on and off slowly, the threshold voltage of the ON/OFF pin has a 0.2-V hysteresis.

The waveforms during the on/off operation are shown in Figure 3-5 below.

Figure 3-5. Waveforms During On/Off Operation

OUT1

ON/OFF

DTC1

DTC1

FB

DTC2

OUT2

CT

dCT

Discharge of CT, DTC1

T8

T7

VIN(OFF) VIN(ON)