NJM2369
■ TYPICAL APPLICATIONS
V+
Rsf
330kΩ
Rsr Cs
180kΩ 4.7uF
RT
36kΩ
CT
1,000pF
CIN
GND
8
VREF
U.V.LO
7
30uA
OSC
6
L.O
0.52V
ER⋅AMP
PW M
S.C.P
1
2
3
CLP
2,200pF
RNF
1MΩ
5
D1
N1
N2
4
*100kΩ
COUT
Q1
VOUT
+5V
R2
22kΩ
2kΩ
R1
2.2kΩ
GND
When Short Circuit Protection (SCP) is activated, Output terminal (Pin 4) becomes high impedance and the external
switching transistor (Q1) is turned off.
However, small leak current from Output terminal at high ambient temperature may turn on the external switching transistor
causing malfunction of the SCP particularly when FET is used as a switching device.
To avoid this issue, insert a 100kΩ resistor between the Gate and the Source of the external transistor.
-4-
Ver.2004-06-03