PD166105GS

R07DS0604EJ0100 Rev.1.00

Page 6 of 15

Jan 19, 2012

Outline of Functions

Input Circuit (On/Off Control)

Output MOS turns on when the high-level input voltage (3.0 V or more) is applied to IN terminal.

Output MOS turns off when the low-level input voltage (1.5 V or less) is applied to IN terminal.

GND

5 V

(Resistance load)

GND

"L"

"H"

"H"

"H"

ON

ON

"L"

"L"

"L"

OFF

OFF

OFF

OFF

ON

Dynamic Clamp Circuit

This circuit is for protection of output and other circuits from the overvoltage by back electromotive force when

inductive load turns off. The clamp diode is connected between drain and gate of output. Output voltage is clamped by

this circuit when the voltage of the OUT terminal exceeded the output clamping voltage.

(Inductive load)

5 V

GND

GND

"H"

ON

"L"

"L"

OFF

OFF

Current Limitation Circuit

This circuit prevents destruction from the overcurrent when the short-circuit occurs. When the overcurrent flows to the

OUT terminal such as short-circuit condition, the output current is limited.

Power supply voltage to OUT terminal should be 18 V or less when the short-circuit occurs.

Overtemperature Protection Circuit

This circuit prevents destruction from overtemperature. The channel temperature of the output is monitored and the

output is shut down when overtemperature is detected. Output restarts automatically after the channel cooled down.

5 V

GND

"H"

"L"

"L"

OFF

OFF

OFF

ON

ON

Tch

GND