UC3843AN ON Semiconductor, UC3843AN Datasheet - Page 3

• 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

2. Adjust V
3. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
ELECTRICAL CHARACTERISTICS
unless otherwise noted.)
REFERENCE SECTION
OSCILLATOR SECTION
ERROR AMPLIFIER SECTION
Reference Output Voltage (I
Line Regulation (V
Load Regulation (I
Temperature Stability
Total Output Variation over Line, Load, Temperature
Output Noise Voltage (f = 10 Hz to 10 kHz,
Long Term Stability (T
Output Short Circuit Current
Frequency
Frequency Change with Voltage (V
Frequency Change with Temperature
Oscillator Voltage Swing (Peak−to−Peak)
Discharge Current (V
Voltage Feedback Input (V
Input Bias Current (V
Open Loop Voltage Gain (V
Unity Gain Bandwidth (T
Power Supply Rejection Ratio (V
Output Current
Output Voltage Swing
T
T
T
T
T
T
Sink (V
Source (V
High State (R
Low State (R
T
J
low
A
A
J
J
A
= 25°C)
= 25°C
= 25°C
= T
= T
= T
= 0°C for UC3842A, UC3843A
−25°C for UC2842A, UC2843A
low
low
low
O
CC
= 1.1 V, V
to T
to T
to T
O
above the Startup threshold before setting to 15 V.
= 5.0 V, V
L
L
high
high
high
= 15 k to V
Characteristics
= 15 k to ground, V
O
CC
= 1.0 mA to 20 mA)
osc
FB
FB
= 12 V to 25 V)
A
= 125°C for 1000 Hours)
= 2.7 V)
FB
= 2.0 V)
J
= 2.7 V)
= 25°C)
O
= 2.3 V)
O
ref
O
= 2.5 V)
= 2.0 V to 4.0 V)
, V
= 1.0 mA, T
FB
CC
CC
UC3842A, UC3843A, UC2842A, UC2843A
= 2.7 V)
= 12 V to 25 V)
FB
= 12 V to 25 V)
= 2.3 V)
(V
J
CC
= 25°C)
= 15 V, [Note 2], R
T
high
= +70°C for UC3842A, UC3843A
Symbol
Df
Df
Reg
http://onsemi.com
Reg
+85°C for UC2842A, UC2843A
PSRR
I
I
Source
A
dischg
V
I
V
osc/
osc/
V
V
V
V
f
BW
I
Sink
T
V
I
osc
VOL
SC
S
osc
IB
OH
ref
ref
FB
OL
S
load
n
line
D
D
V
T
T
= 10 k, C
3
4.95
− 30
2.45
−0.5
Min
4.9
7.5
7.2
0.7
2.0
5.0
47
46
65
60
−
−
−
−
−
−
−
−
−
−
T
UC284XA
= 3.3 nF, T
− 85
−0.1
−1.0
Typ
5.0
2.0
3.0
0.2
5.0
0.2
5.0
1.6
8.4
2.5
1.0
6.2
0.8
50
52
90
70
12
−
−
−
A
− 180
Max
5.05
2.55
−1.0
= T
5.1
1.0
9.3
9.5
1.1
20
25
57
60
−
−
−
−
−
−
−
−
−
−
−
low
to T
4.82
− 30
2.42
−0.5
Min
4.9
7.5
7.2
0.7
2.0
5.0
47
46
65
60
high
−
−
−
−
−
−
−
−
−
−
[Note 3],
UC384XA
− 85
−0.1
−1.0
Typ
5.0
2.0
3.0
0.2
5.0
0.2
5.0
1.6
8.4
2.5
1.0
6.2
0.8
50
52
90
70
12
−
−
−
− 180
Max
5.18
2.58
−2.0
5.1
1.0
9.3
9.5
1.1
20
25
57
60
−
−
−
−
−
−
−
−
−
−
−
mV/°C
Unit
MHz
kHz
mV
mV
mV
mA
mA
mA
mV
mA
dB
dB
%
%
V
V
V
V
V