UC3842/UC3843/UC3844/UC3845
Absolute Maximum Ratings
Parameter
Supply Voltage
Output Current
Analog Inputs (Pin 2.3)
Error Amp Output Sink Current
Power Dissipation at T
A
≤25°C
(8DIP)
Power Dissipation at T
A
≤25°C
(8SOP)
Power Dissipation at T
A
≤25°C
(14SOP)
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
Symbol
V
CC
I
O
V
(ANA)
I
SINK (E.A)
P
D
(Note1,2)
P
D
(Note1,2)
P
D
(Note1,2)
T
STG
T
LEAD
Value
30
±1
-0.3 to 6.3
10
1200
460
680
-65 ~ +150
+300
Unit
V
A
V
mA
mW
mW
mW
°C
°C
Note:
1. Board Thickness 1.6mm, Board Dimension 76.2mm
×114.3mm,
(Reference EIA / JSED51-3, 51-7)
2. Do not exceeed P
D
and SOA (Safe Operation Area)
Power Dissipation Curve
1200
8DIP
1100
POWER DISSIPATION (mW)
1000
900
800
700
600
500
400
300
0
10
20
30
40
50
60
70
80
90
100 110 120 130 140 150
14SOP
8SOP
AMBIENT TEMPERATURE (℃)
Thermal Data
Characteristic
Thermal Resistance Junction-ambient
Symbol
R
thj-amb(MAX)
8-DIP
100
8-SOP
265
14-SOP
180
Unit
°C/W
Pin Array
8DIP,8SOP
14SOP
COMP 1
8
V
REF
COMP 1
14 V
REF
V
FB
2
7
V
CC
N/C
2
13
N/C
CURRENT SENSE
3
6
OUTPUT
V
FB
3
12
V
CC
R
T/
C
T
4
5 GND
N/C 4
11 PWR V
C
CURRENT SENSE
5
10 OUTPUT
N/C
6
9
GND
R
T/
C
T
7
8
PWR GND
2
FAIRCHILD [ FAIRCHILD SEMICONDUCTOR ]
