UC3843AN ON Semiconductor, UC3843AN Datasheet - Page 4

• 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

4. Adjust V
5. Low duty cycle pulse techniques are used during test to maintain junction temperature as close to ambient as possible.
6. This parameter is measured at the latch trip point with V
7. Comparator gain is defined as: A
ELECTRICAL CHARACTERISTICS
unless otherwise noted.)
CURRENT SENSE SECTION
OUTPUT SECTION
UNDERVOLTAGE LOCKOUT SECTION
PWM SECTION
TOTAL DEVICE
Current Sense Input Voltage Gain (Notes 6 & 7)
Maximum Current Sense Input Threshold (Note 6)
Power Supply Rejection Ratio
Input Bias Current
Propagation Delay (Current Sense Input to Output)
Output Voltage
Output Voltage with UVLO Activated
Output Voltage Rise Time (C
Output Voltage Fall Time (C
Startup Threshold
Minimum Operating Voltage After Turn−On
Duty Cycle
Power Supply Current (Note 4)
Power Supply Zener Voltage (I
T
V
Low State (I
Low State
High State
V
UCX842A
UCX843A
UCX842A
UCX843A
Maximum
Minimum
Startup:
(V
(V
High State (I
low
CC
CC
CC
CC
= 0°C for UC3842A, UC3843A
= 12 to 25 V (Note 6)
= 6.0 V, I
= 6.5 V for UCX843A,
=
−25°C for UC2842A, UC2843A
CC
14 V for UCX842A) Operating
above the Startup threshold before setting to 15 V.
(I
(I
Sink
Sink
Sink
Sink
Sink
Characteristics
= 200 mA)
= 20 mA)
= 200 mA)
= 20 mA)
= 1.0 mA
L
L
= 1.0 nF, T
= 1.0 nF, T
CC
= 25 mA)
V
UC3842A, UC3843A, UC2842A, UC2843A
DV Output Compensation
DV Current Sense Input
J
(V
J
= 25°C)
CC
= 25°C)
= 15 V, [Note 4], R
T
high
= +70°C for UC3842A, UC3843A
V
t
PLH(in/out)
Symbol
V
OL(UVLO)
DC
http://onsemi.com
PSRR
DC
+85°C for UC2842A, UC2843A
CC(min)
V
V
FB
I
V
V
A
V
I
CC
IB
OH
t
t
OL
max
V
th
r
f
th
min
Z
= 0 V.
T
= 10 k, C
4
2.85
Min
0.9
7.8
9.0
7.0
13
12
15
94
30
−
−
−
−
−
−
−
−
−
−
−
T
UC284XA
= 3.3 nF, T
−2.0
13.5
13.4
Typ
150
3.0
1.0
0.1
1.6
0.1
8.4
7.6
0.5
70
50
50
16
10
96
12
36
−
A
Max
3.15
−10
300
150
150
= T
1.1
0.4
2.2
1.1
9.0
8.2
1.0
17
11
17
−
−
−
−
0
−
low
to T
2.85
14.5
Min
0.9
7.8
8.5
7.0
13
12
94
30
high
−
−
−
−
−
−
−
−
−
−
−
[Note 5],
UC384XA
−2.0
13.5
13.4
Typ
150
3.0
1.0
0.1
1.6
0.1
8.4
7.6
0.5
70
50
50
16
10
96
12
36
−
Max
3.15
17.5
11.5
−10
300
150
150
1.1
0.4
2.2
1.1
9.0
8.2
1.0
17
−
−
−
−
0
−
Unit
V/V
mA
dB
mA
ns
ns
ns
%
V
V
V
V
V
V