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UC3842 Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part No. UC3842
Description  SMPS Controller
Download  12 Pages
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Maker  FAIRCHILD [Fairchild Semiconductor]
Homepage  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

UC3842 Datasheet(HTML) 2 Page - Fairchild Semiconductor

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UC3842/UC3843/UC3844/UC3845
2
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 PD and SOA (Safe Operation Area)
Power Dissipation Curve
Thermal Data
Pin Array
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
30
V
Output Current
IO
±1A
Analog Inputs (Pin 2.3)
V(ANA)
-0.3 to 6.3
V
Error Amp Output Sink Current
ISINK (E.A)
10
mA
Power Dissipation at TA
≤25°C (8DIP)
PD(Note1,2)
1200
mW
Power Dissipation at TA
≤25°C (8SOP)
PD(Note1,2)
460
mW
Power Dissipation at TA
≤25°C (14SOP)
PD(Note1,2)
680
mW
Storage Temperature Range
TSTG
-65 ~ +150
°C
Lead Temperature (Soldering, 10sec)
TLEAD
+300
°C
Characteristic
Symbol
8-DIP
8-SOP
14-SOP
Unit
Thermal Resistance Junction-ambient
Rthj-amb(MAX)
100
265
180
°C/W
800
700
600
500
400
300
900
1000
1100
0
1020
3040
50
60
7080
90100 110 120 130 140 150
AMBIENT TEMPERATURE (℃)
1200
8DIP
14SOP
8SOP
800
700
600
500
400
300
900
1000
1100
0
1020
3040
50
30
40
50
60
70
80
60
70
80
90
100 110
90
100 110 120 130 140
120 130 140 150
AMBIENT TEMPERATURE (℃)
1200
8DIP
14SOP
8SOP
VCC
GND
PWR GND
COMP
1
N/C
2
VFB
N/C
3
4
VREF
N/C
PWR VC
14
13
12
11
CURRENT SENSE
5
N/C
RT/CT
6
7
OUTPUT
10
9
8
COMP 1
VFB
2
CURRENT SENSE
RT/CT
3
4
VREF
VCC
OUTPUT
GND
8
7
6
5
8DIP,8SOP
14SOP
VCC
GND
PWR GND
COMP
1
N/C
2
VFB
N/C
3
4
VREF
N/C
PWR VC
14
13
12
11
CURRENT SENSE
5
N/C
RT/CT
6
7
OUTPUT
10
9
8
VCC
GND
PWR GND
COMP
1
N/C
2
VFB
N/C
3
4
VREF
N/C
PWR VC
14
13
12
11
CURRENT SENSE
5
N/C
RT/CT
6
7
OUTPUT
10
9
8
COMP 1
VFB
2
CURRENT SENSE
RT/CT
3
4
VREF
VCC
OUTPUT
GND
8
7
6
5
COMP 1
VFB
2
CURRENT SENSE
RT/CT
3
4
VREF
VCC
OUTPUT
GND
8
7
6
5
8DIP,8SOP
14SOP


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