UC3843DX Fairchild Semiconductor, UC3843DX Datasheet - Page 2

• Manufacturer Part Number: UC3843DX
• Description: IC CTLR PWM CURR MODE 14-SOIC
• Manufacturer: Fairchild Semiconductor

Specifications of UC3843DX

• 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
• Operating Supply Voltage: 30 V
• Supply Current: 17 mA
• 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

UC3842/UC3843/UC3844/UC3845
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
Power Dissipation at T
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
Characteristic
Thermal Resistance Junction-ambient
D
and SOA (Safe Operation Area)
A
A
A
25 C (8DIP)
25 C (8SOP)
25 C (14SOP)
CURRENT SENSE
CURRENT SENSE
CURRENT SENSE
1200
1200
1100
1100
1000
1000
600
600
500
500
400
400
900
900
800
800
700
700
300
300
COMP 1
COMP 1
COMP 1
R
R
R
T/
T/
T/
V
V
V
C
C
C
0
0
FB
FB
FB
T
T
T
2
2
2
3
3
3
4
4
4
8SOP
8SOP
10
10
8DIP,8SOP
8DIP,8SOP
20
20
R
thj-amb(MAX)
30
30
30
Symbol
AMBIENT TEMPERATURE (℃)
AMBIENT TEMPERATURE (℃)
40
40
40
P
P
P
8
8
8
7
7
7
6
6
6
5
5
5
I
SINK (E.A)
D
D
D
50
50
50
OUTPUT
OUTPUT
OUTPUT
GND
GND
GND
Symbol
V
V
V
V
V
V
V
REF
REF
REF
CC
CC
CC
T
14SOP
14SOP
(Note1,2)
(Note1,2)
(Note1,2)
T
V
(ANA)
LEAD
STG
I
60
60
60
CC
CURRENT SENSE
CURRENT SENSE
CURRENT SENSE
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
8-DIP
T
T
T
90
90
90
100
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
120 130 140 150
-65 ~ +150
-0.3 to 6.3
13
13
13
12
12
12
10
10
10
Value
14
14
14
11
11
11
8-SOP
9
9
9
8
8
8
+300
1200
460
680
30
10
265
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
REF
REF
REF
CC
CC
CC
1
C
C
C
14-SOP
180
Unit
mW
mW
mW
mA
V
A
V
C
C
Unit
C/W