Current Mode PWM Controller
KA3843A(AM)
Electrical characteristics (*V
CC
=15V, R
T
=10kΩ, C
T
=3.3nF, T
A
=0
0
C to +70
0
C, unless otherwise
specified)
Characteristics
Symbol
Test Condition
Min
Typ
Max
Reference Section
Reference Output Voltage
Line Regulation
Load Regulation
Short Circuit Output Current
Oscillator Section
Oscillation Frequency
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
Supply Voltage Rejection
Input Bias Current
Output Section
Low Output Voltage
High Output Voltage
Rise Time
Fall Time
f
∆f/∆V
CC
V
(OSC)
I
BIAS
V
I(E.A)
A
VOL
PSRR
I
SINK
I
SOURCE
V
OH
V
OL
G
V
V
I(MAX)
SVR
I
BIAS
V
OL
V
OH
t
R
t
F
T
J
= 25°C
384XA
384XAM
47
47
50
52
0.05
1.6
-0.1
2.42
65
60
2
-0.5
5.0
2.5
90
70
7
-1.0
6.0
0.8
2.85
0.9
3.0
1.0
70
-3.0
0.08
1.4
13.5
13.0
45
35
1.1
3.15
1.1
-10
0.4
2.2
-2
2.58
57
57
1.0
KHz
%
V
µA
V
dB
mA
mA
V
V
REF
∆V
REF
∆V
REF
I
SC
T
J
= 25°C, I
REF
= 1 mA
12V
≤
V
CC
≤
25 V
1 mA
≤
I
REF
≤
20mA
T
A
= 25°C
4.9
5.0
6.0
6.0
-100
5.1
20
25
-180
mA
Unit
V
mV
12V
≤
V
CC
≤
25 V
(peak to peak)
V
FB
=3V
V
pin1
= 2.5V
2V
≤
V
0
≤
4V
12V
≤
V
CC
≤
25 V
V
pin2
= 2.7V, V
pin1
= 1.1V
V
pin2
= 2.3V, V
pin1
= 5V
V
pin2
= 2.3V, R
L
= 15KΩ to GND
V
pin2
= 2.7V, R
L
= 15KΩ to PIN 8
(Note 1 & 2)
V
pin1
= 5V (Note1)
12V
≤
V
CC
≤
25 V (Note 1)
V
pin3
= 3V
I
SINK
I
SINK
I
SINK
I
SINK
=
=
=
=
20 mA
200 mA
20 mA
200 mA
V/V
V
dB
µA
13
12
V
T
J
= 25°C, C
L
= 1nF (Note 3)
T
J
= 25°C, C
L
= 1nF (Note 3)
150
150
nS
Undervoltage Lockout Section
Start Theshold
V
TH(ST)
3843A(AM)
Min. Operating Voltage
(After Turn On)
PWM Section
Max. Duty Cycle
Min. Duty Cycle
Total Standby Current
V
OPR(min)
3843A(AM)/45A(AM)
D
(MAX)
D
(MAX)
0.17
13
38
3842A(AM)/43A(AM)
7.0
95
7.6
97
8.2
100
7.8
8.4
9.0
V
V
%
0
0.3
17
384XA(AM)
I
ST
Start−Up Current
Operating Supply Current
I
CC (OPR)
V
pin3
= V
pin2
= 0V
Zener Voltage
V
Z
I
CC
=25 mA
30
* Adjust V
CC
above the start threshold before setting it to 15V.
Note 1: Parameter measured at trip point of latch with V
pin2
=0.
Note 2: Gain defined as A=∆V
pin1
/∆V
pin3
; 0
≤
V
pin3
≤
0.8V.
Note 3: These parameters, although guaranteed, are not 100% tested in production.
mA
V
2
WINGS [ WING SHING COMPUTER COMPONENTS ]
