KA3843BDTF Fairchild Semiconductor, KA3843BDTF Datasheet - Page 2
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KA3843BDTF
Manufacturer Part Number
KA3843BDTF
Description
IC CONTROLLER PWM SMPS 14-SOP
Manufacturer
Fairchild Semiconductor
Datasheet
1.KA3843B.pdf
(10 pages)
Specifications of KA3843BDTF
Pwm Type
Current Mode
Number Of Outputs
1
Frequency - Max
500kHz
Duty Cycle
100%
Voltage - Supply
8.2 V ~ 30 V
Buck
No
Boost
No
Flyback
No
Inverting
No
Doubler
No
Divider
No
Cuk
No
Isolated
No
Operating Temperature
0°C ~ 70°C
Package / Case
14-SOIC (3.9mm Width), 14-SOL
Frequency-max
500kHz
Duty Cycle (max)
100 %
Output Current
1000 mA
Mounting Style
SMD/SMT
Switching Frequency
500 KHz
Maximum Operating Temperature
+ 70 C
Fall Time
35 ns
Minimum Operating Temperature
0 C
Rise Time
45 ns
Synchronous Pin
No
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
KA3842B/KA3843B/KA3844B/KA3845B
Absolute Maximum Ratings
Note:
1. Board Thickness 1.6mm, Board Dimension 76.2mm 114.3mm, (Reference EIA / JSED51-3, 51-7)
2. Do not exceeed P
Power Dissipation Curve
Thermal Data
Pin Array
2
Parameter
Supply Voltage
Output Current
Analog Inputs (Pin 2.3)
Error Amp Output Sink Current
Power Dissipation at T
Power Dissipation at T
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
Characteristic
Thermal Resistance Junction-ambient
D
and SOA (Safe Operation Area)
A
A
25 C (8DIP)
25 C (14SOP)
CURRENT SENSE
CURRENT SENSE
CURRENT SENSE
1200
1200
1100
1100
1000
1000
COMP 1
COMP 1
COMP 1
600
600
500
500
400
400
900
900
800
800
700
700
300
300
R
R
R
T/
T/
T/
V
V
V
C
C
C
FB
FB
FB
T
T
T
0
0
4
4
4
2
2
2
3
3
3
8DIP,8SOP
8DIP,8SOP
10
10
8-DIP
20
20
30
30
30
AMBIENT TEMPERATURE (℃)
AMBIENT TEMPERATURE (℃)
40
40
40
R
8
8
8
7
7
7
6
6
6
5
5
5
P
P
thj-amb(MAX)
I
GND
GND
GND
V
V
V
V
V
V
OUTPUT
OUTPUT
OUTPUT
SINK (E.A)
D
D
50
50
50
14SOP
14SOP
REF
REF
REF
CC
CC
CC
Symbol
Symbol
V
T
(Note1,2)
(Note1,2)
T
V
(ANA)
LEAD
STG
60
60
60
CURRENT SENSE
CURRENT SENSE
CURRENT SENSE
I
CC
O
70
70
70
80
80
80
COMP 1
COMP 1
COMP 1
R
R
R
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
T/
T/
T/
V
V
V
C
C
C
FB
FB
FB
T
T
T
90
90
90
8DIP
8DIP
4
4
4
6
6
6
7
7
7
2
2
2
3
3
3
5
5
5
100 110 120 130 140 150
100 110
100 110 120 130 140
14SOP
14SOP
8-DIP
100
120 130 140 150
-65 ~ +150
-0.3 to 6.3
Value
13
13
13
12
12
12
14
14
14
11
11
11
10
10
10
+300
1200
9
9
9
8
8
8
680
30
10
V
V
V
N/C
N/C
N/C
V
V
V
PWR V
PWR V
PWR V
OUTPUT
OUTPUT
OUTPUT
GND
GND
GND
PWR GND
PWR GND
PWR GND
1
REF
REF
REF
CC
CC
CC
C
C
C
14-SOP
180
Unit
mW
mW
mA
V
A
V
C
C
Unit
C/W