UC3843ADX Fairchild Semiconductor, UC3843ADX Datasheet - Page 2

• Manufacturer Part Number: UC3843ADX
• Description: IC PWM CNTLLR 8SOIC
• Manufacturer: Fairchild Semiconductor

Specifications of UC3843ADX

• Pwm Type: Controller
• Number Of Outputs: 1
• Frequency - Max: 500kHz
• Duty Cycle: 100%
• Voltage - Supply: 8.2 V ~ 30 V
• Buck: No
• Boost: No
• Flyback: No
• Inverting: No
• Doubler: No
• Divider: No
• Cuk: No
• Isolated: No
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 8-SOIC (3.9mm Width)
• Frequency-max: 500kHz
• Duty Cycle (max): 100 %
• Output Current: 1000 mA
• Mounting Style: SMD/SMT
• Switching Frequency: 500 KHz
• Operating Supply Voltage: 30 V
• Supply Current: 17 mA
• Maximum Operating Temperature: + 70 C
• Fall Time: 40 ns
• Minimum Operating Temperature: 0 C
• Rise Time: 40 ns
• Synchronous Pin: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

UC3842A/UC3843A
Absolute Maximum Ratings
Electrical Characteristics
(V
2
Parameter
REFERENCE SECTION
Output Voltage
Line Regulation
Load Regulation
Output Short Circuit
OSILLATOR SECTION
Initial Accuracy
Voltage Stability
Amplitude
Discharge Current
CURRENT SENSE SECTION
Gain
Maximum Input Signal
PSRR
Input Bias Current
Delay to Output
Supply Voltage
Output Current
Analog Inputs (pin 2, 3)
Error Amp. Output Sink Current
Power Dissipation
CC
= 15V, R
Parameter
T
= 10K , C
T
= 3.3nF, T
A
I
Symbol
V
DISCHG
PSRR
= 0 C to + 70 C ,Unless otherwise specified)
V
F
V
I
I(MAX)
ST
V
V
BIAS
I
OSC
G
OSC
T
REF
SC
REF
REF
D
V
V
I
Symbol
SINK(EA)
T
V
I
T
T
V
V
T
(NOTE 2, 3)
V
V
V
V
O
J
CC
a
J
CC
PIN4
J
PIN1
CC
PIN3
V
I(ANA)
P
I
= 1mA to 20mA
= 25 C, I
= 25 C
= 25 C
= 25 C, Pin4 = 2V
CC
O
D
= 12V to 25V
= 12V to 25V
= 12V to 25V (NOTE 1, 2)
, Peak to Peak
= 5V(NOTE 2)
= 0 V to 2V (NOTE1)
Conditions
O
= 1mA
-
- 0.3 to 6.3
Value
± 1
30
10
1
Min.
2.85
4.9
7.8
0.9
47
-
-
-
-
-
-
-
-
- 100 - 180
Typ.
100
5.0
0.2
1.7
8.3
1.0
52
70
- 2
6
6
3
Unit
mA
W
V
A
V
Max.
3.15
200
-10
5.1
8.8
1.1
20
25
57
1
-
-
Unit
KHz
V/V
mV
mV
mA
mA
dB
uA
ns
%
V
V
V