UC3843AN ON Semiconductor, UC3843AN Datasheet - Page 2

• Manufacturer Part Number: UC3843AN
• Description: IC CTRLR CURRENT MODE HP 8DIP
• Manufacturer: ON Semiconductor
• Type: High Performance Current Mode Controllersr

Specifications of UC3843AN

• Pwm Type: Current Mode
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 96%
• Voltage - Supply: 8.2 V ~ 25 V
• Buck: No
• Boost: No
• Flyback: Yes
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: Yes
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Frequency-max: 500kHz
• Output Voltage Range: 4.9 V to 5.1 V
• Input Voltage Range: 30 V
• Operating Temperature Range: 0 C to + 70 C
• Mounting Style: Through Hole
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: UC3843ANOS

Maximum ratings are those values beyond which device damage can occur. Maximum ratings applied to the device are individual stress limit
values (not normal operating conditions) and are not valid simultaneously. If these limits are exceeded, device functional operation is not implied,
damage may occur and reliability may be affected.
1. Maximum Package power dissipation limits must be observed.
MAXIMUM RATINGS
Bias and Driver Voltages (Zero Series Impedance, see also Total Device spec)
Total Power Supply and Zener Current
Output Current, Source or Sink (Note 1)
Output Energy (Capacitive Load per Cycle)
Current Sense and Voltage Feedback Inputs
Error Amp Output Sink Current
Power Dissipation and Thermal Characteristics
Operating Junction Temperature
Operating Ambient Temperature
Storage Temperature Range
D Suffix, Plastic Package
N Suffix, Plastic Package
UC3842A, UC3843A
UC2842A, UC2843A
Maximum Power Dissipation @ T
Thermal Resistance, Junction−to−Air
Maximum Power Dissipation @ T
Thermal Resistance, Junction−to−Air
Compensation
Feedback
Voltage
Input
Output
R
V
8(14)
T
C
4(7)
2(3)
1(1)
ref
UC3842A, UC3843A, UC2842A, UC2843A
T
A
A
= 25°C
= 25°C
Rating
Amplifier
Pin numbers in parenthesis are for the D suffix SOIC−14 package.
+
−
Error
Figure 1. Simplified Block Diagram
R
R
Oscillator
http://onsemi.com
GND
Undervoltage
Lockout
V
ref
5(9)
2
Reference
5.0V
Latching
PWM
V
Undervoltage
CC
Lockout
V
CC
7(12)
(I
V
Symbol
CC
7(11)
6(10)
5(8)
3(5)
CC
Output
R
R
V
T
V
P
P
T
T
C
I
W
I
qJA
qJA
stg
Power
Ground
O
O
, V
in
A
+ I
D
D
J
Current
Sense
Input
Z
C
)
− 0.3 to + 5.5
− 65 to + 150
− 25 to + 85
0 to + 70
Value
+ 150
1.25
862
145
100
1.0
5.0
30
30
10
°C/W
°C/W
Unit
mW
mA
mA
°C
°C
°C
mJ
W
V
A
V