UC3843AD Fairchild Semiconductor, UC3843AD Datasheet - Page 3

• Manufacturer Part Number: UC3843AD
• Description: IC PWM CNTLLR 8SOIC
• Manufacturer: Fairchild Semiconductor

Specifications of UC3843AD

• 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
• Other names: UC3843ADFS

Electrical Characteristics (Continued)
(V
* Adjust V
Notes :
1. These parameters, although guaranteed, are not 100% tested in production.
2. Parameter measured at trip point of latch with V2 = 0V.
3. Gain defined as: G
ERROR AMPLIFIER SECTION
Input Voltage
Input Bias Current
Open Loop Gain
Unity Gain Bandwidth
PSRR
Output Sink Current
Output Source Current
Output High Voltage
Output Low Voltage
OUTPUT SECTION
Output Low Level
Output High Level
Rise Time
Fall Time
Output Voltage Swing Limit
UNDER VOLTAGE LOCKOUT SECTION
Start Threshold
PWM SECTION
Maximum Duty Cycle
Minimum Duty Cycle
TOTAL STANDBY CURRENT
Start-Up Current
Operating Supply Current
V
Min. Operating Voltage
( After turn on )
CC
CC
= 15V, R
Zener Voltage
CC
Parameter
above the start threshold before setting at 15V
T
= 10K , C
V
= V
T
PIN1
= 3.3nF, T
V
I
PIN3
Symbol
SOURCE
V
PSRR
D
GBW
I
D
I
G
V
V
SINK
V
V
V
BIAS
V
I
OLIM
I
MAX
V
A
CC
V
t
MIN
t
ST
OH
OH
VO
OL
OL
TH
R
TL
(V
F
Z
I
= 0 C to + 70 C, Unless otherwise specified)
PIN3
= 0 to 0.8V)
UC3842A
UC3842A
T
V
T
V
V
V
V
V
V
R1 = 15K
V
R1 = 15K
I
I
I
I
T
T
V
UC3843A
UC3843A
UC3842A/UC3843A
V
I
SINK
SINK
SOURCE
SOURCE
CC
PIN1
J
J
J
O
CC
PIN2
PIN1
PIN2
PIN1
PIN2
PIN2
CC
PIN2
= 25 C (NOTE 1)
= 25 C, C1 = 1nF (NOTE 1)
= 25 C, C1 = 1nF (NOTE 1)
= 2V to 4V (NOTE 1)
= 25mA
= 12V to 25V (NOTE 1)
= 27V, C1 = 1nF
= 20mA
= 200mA
= 2.5V
= 2.7V
= 1.1V
= 2.3V
= 5.0V
= 2.3V
= 2.7V
= V
= 20mA
= 200mA
PIN3
to GND
to Pin8
Conditions
= 0V
-
-
-
Min.
2.42
-0.5
0.7
7.8
7.0
65
60
13
12
15
94
2
5
9
-
-
-
-
-
-
-
-
-
-
-
Typ.
2.50
13.5
13.5
-0.3
-0.8
0.8
0.1
1.5
8.4
7.6
0.2
90
70
40
40
22
16
10
96
29
11
1
6
6
-
UC3842A/UC3843A
Max.
2.58
100
100
100
1.1
0.4
2.2
9.0
8.2
0.4
- 2
17
17
11
0
-
-
-
-
-
-
-
-
-
-
MHz
Unit
mA
mA
mA
mA
uA
dB
dB
ns
ns
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
3