KA3842 Wing Shing Computer Components, KA3842 Datasheet - Page 2

• Manufacturer Part Number: KA3842
• Description: Linear Integrated Circuit(CURRENT-MODE PWM CONTROLLER)
• Manufacturer: Wing Shing Computer Components

Reference Section
Reference Output Voltege
Line Regulation
Load Regulation
Short Circit Output Current
Oscillator Section
Oscillation Freguency
Frequency Change with
Voltage
Oscillator Amplitude
Error Amplifier Section
Input Bias Current
Input Voltage
Open Loop Voltage Gain
Power Supply Rejection Ratio
Output Sink Current
Output Source Current
High Output Voltage
Low Output Voltage
Current Sense Section
Gain
Maximum Input Signal
Power Supply Rejection Ratio
Input Bias Current
Output Section
Low Output Voltage
High Output Voltage
Rise Time
Fall Time
Under Voltage Lockout Section
Start Theshold
Min. Operating Voltage
(After Turn On)
PWM Section
Max. Duty Cycle
Min. Duty Cycle
Total Standby Current
Start Up Current
Operating Supply Current
Zener Voltage
Electrical characteristics (*V
otherwise specified)
* Adjust V
Note 1: Parameter measured at trip point of lath with V
Note 2: Gain defined as A= V
Note 3: These parameters, although guaranteed, are not 100% tested in production.
Characteristics
CC
above the start threshold before setting at 15V
Symbol
V
I
I
CC (OPR)
V
f/ V
V
D
D
V
SOURCE
OPR(min)
PSRR
PSRR
V
1
V
I
I
I
G
I(MAX)
TH(ST)
V
V
(OSC)
SINK
V
V
(MAX)
(MAX)
V
V
BIAS
BIAS
/ V
I
I(E.A)
G
I
V
REF
t
SC
t
ST
OH
OH
f
VO
OL
OL
REF
REF
R
F
V
Z
CCF
3
CC
; 0
=15V, R
T
12V
1 mA
T
T
12V
V
2V
12V
V
V
V
V
(Note 1 & 2)
V
12V
I
I
I
I
T
T
V
SINK
SINK
SINK
SINK
J
A
J
J
J
1
2
2
2
2
1
3
V
= 25 C, I
= 25 C
= 25 C, C
= 25 C, C
= 25 C
= 2.5V
= 2.7V, V
= 2.3V, V
= 2.3V, R
= 2.7V, R
= 5V (Note1)
= V
3
V0
= 20 mA
= 200 mA
= 20 mA
= 200 mA
Test Condition
V
V
V
V
2
CC
I
CC
CC
CC
= 0V
0.8V
REF
T
4V
=10k , C
REF
1
1
L
L
25 V
25 V
25 V
25 V (Note 1)
L
L
20mA
= 1.1V
= 5V
= 15K
= 15K
= 1nF (Note 3)
= 1nF (Note 3)
= 1 mA
2
2
=0
to GND
to PIN 8
T
=3.3nF, T
Min
2.42
2.85
14.5
-0.5
4.9
5.0
0.9
47
65
60
13
12
8.5
30
2
A
KA3842A/KA3842AM
95
=0
0
C to +70
Typ
-100
0.05
0.08
13.5
13.0
-0.1
-1.0
-3.0
16.0
5.0
6.0
6.0
1.6
2.5
6.0
0.8
3.0
1.0
1.4
0.17
52
90
70
70
45
35
14
38
10
7
97
0
C, unless
Max
-180
2.58
3.15
17.5
150
150
11.5
-10
5.1
1.0
1.1
1.1
0.4
2.2
20
25
57
17
-2
100
0.3
0
Unit
KHz
V
V/V
mV
mA
mA
mA
dB
dB
nS
%
mA
V
%
V
V
p-p
V
V
V
V
V
A
A