Data Sheet
GREEN MODE PWM CONTROLLER
Electrical Characteristics
(V
CC
=15V, R
T
=10kΩ C
T
=3.3nF, T
A
= -40 to 85
o
C, unless otherwise specified.)
Parameter
REFERENCE SECTION
Reference Output Voltage
Total Output Variation
Line Regulation
Load Regulation
Short Circuit Output Current
Temperature Stability
UNDER VOLTAGE LOCK OUT SECTION
Start-up Threshold
AP3842G/AP3844G
AP3843G/AP3845G
Minimum Operating Voltage
AP3842G/AP3844G
AP3843G/AP3845G
TOTAL STANDBY CURRENT SECTION
Start-up Current
Operating Current
Standby Operating Current
Zener Voltage
PWM SECTION
Maximum Duty Cycle
AP3842G/AP3843G
AP3844G/AP3845G
Minimum Duty Cycle
OSCILLATOR SECTION
Oscillation Frequency
Oscillator Amplitude
Temperature Stability
Voltage Stability
Discharge Current
12V
≤
V
CC
≤
25V
V
RT/CT
= 2V (Note 4)
8.5
f
V
OSC
T
J
=25
o
C
Pin RT/CT, peak to peak
47
52
1.7
2
0.2
9.5
1
10.5
57
KHz
V
%
%
mA
94
46
96
48
50
0
%
%
V
CC
=14V
V
FB
=0, V
CS
=0, C
L
=1nF
V
FB
=2.7V, V
CS
=0.5V
I
CC
=25mA
30
50
8
6
34
80
µA
mA
mA
V
15
7.8
8.5
7.0
16
8.4
10
7.6
17
9.0
11.5
8.2
V
V
∆V
REF
∆V
REF
I
SC
V
REF
T
J
=25
o
C, I
REF
=1mA
Line, Load, Temp.
12V
≤
V
CC
≤25V
1mA
≤
I
REF
≤20mA
T
A
=25
o
C
4.95
4.9
4
4
-100
0.2
5.00
5.05
5.10
15
15
-180
0.4
V
V
mV
mV
mA
mV/
o
C
Symbol
Conditions
Min
Typ
Max
Unit
AP384XG
Note 4: This parameter is measured with RT=10k
Ω
to V
REF,
it contributes 0.3mA of current to the measured value.
So the total current flowing into the CT pin will be 0.3mA higher than the measured value approximately.
Aug. 2005 Rev. 1. 2
BCD Semiconductor Manufacturing Limited
5
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
