KA3843AC Fairchild Semiconductor, KA3843AC Datasheet - Page 3

• Manufacturer Part Number: KA3843AC
• Description: SMPS Controller
• Manufacturer: Fairchild Semiconductor

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Electrical Characteristics
(V
* Adjust V
Notes :
1. These parameters, although guaranteed, are not 100% tested in production.
2. Parameter measured at trip point of latch with V
3. Gain defined as:
Parameter
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
Min. operating voltage
( after turn on )
PWM SECTION
Maximum duty cycle
Minimum duty cycle
TOTAL STANDBY CURRENT
Start-up current
Operating supply current
V
CC
CC
= 15V, R
zener voltage
CC
above the start threshold before setting at 15V
T
= 10KW, C
G
V
=
------------------------ - O
V
V
T
SENSE
COMP
= 3.3nF, T
;
I
Symbol
SOURCE
V
PSRR
V
D
I
GBW
I
D
G
(Continued)
V
V
SINK
V
V
V
A
BIAS
V
I
OLIM
SENSE
I
MAX
V
t
CC
V
t
MIN
ST
OH
OH
VO
OL
OL
TH
R
TL
F
= 0 C to +70 C, Unless otherwise specified)
Z
I
FB
0.8V
V
V
V
T
V
V
V
V
R1 = 15K to GND
V
R1 = 15k to Vref
I
I
I
I
T
T
V
KA3882E
KA3883E
KA3882E
KA3883E
KA3882E/KA3883E
V
I
SINK
SINK
SOURCE
SOURCE
CC
= 0V.
J
J
J
PIN1
FB
O
CC
PIN2
PIN2
PIN2
PIN2
CC
PIN2
= 25 C (Note1)
= 25 C, C1 = 1nF (Note1)
= 25 C, C1 = 1nF (Note1)
= 2V to 4V (Note1)
=0V
= 25mA
= 12V to 25V (Note1)
= 27V, C1 = 1nF
= 20mA
= 200mA
= 2.5V
= 2.7V, V
= 2.3V, V
= 2.3V
= 2.7V
= V
= 20mA
= 200mA
PIN3
Conditions
= 0V
PIN1
PIN1
-
-
= 1.1V
= 5.0V
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
0.7
0.1
1.5
8.4
7.6
0.2
90
70
40
40
22
16
10
96
29
11
1
6
6
-
Max.
2.58
100
100
100
1.1
0.4
2.2
9.0
8.2
0.4
- 2
17
17
11
0
-
-
-
-
-
-
-
-
-
-
KA3843AC
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