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參數(shù)資料
| 型號(hào)： | KA3842AE |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SMPS Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封裝： | LEAD FREE, DIP-8 |
| 文件頁(yè)數(shù)： | 3/6頁(yè) |
| 文件大?。?/td> | 131K |
| 代理商： | KA3842AE |
3
www.fairchildsemi.com
KA3842AC/KA3842AE Rev. 1.0.1
K
Absolute Maximum Ratings
The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed.
The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics
tables are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will
define the conditions for actual device operation.
Electrical Characteristics
(V
CC
= 15V, R
T
= 10k, C
T
= 3.3nF, T
A
= 0°C to +70°C, unless otherwise specified)
Symbol
Parameter
Value
Unit
V
CC
I
O
V
I(ANA)
I
SINK(EA)
P
D
R
θ
ja
Supply Voltage
30
V
Output Current
±1
A
Analog Inputs (Pins 2, 3)
-0.3 to 6.3
V
Error Amp. Output Sink Current
10
mA
Power Dissipation
Thermal Resistance, Junction-to-Air
(4)
1
W
95
°C/W
Symbol
REFERENCE SECTION
V
REF
Output Voltage
Δ
V
REF
Line Regulation
Load Regulation
I
SC
Output Short Circuit
OSILLATOR SECTION
F
OSC
Initial Accuracy
ST
V
Voltage Stability
V
OSC
Amplitude
I
DISCHG
Discharge Current
CURRENT SENSE SECTION
G
V
V
I(MAX)
PSRR
PSRR
(1)(2)
I
BIAS
Input Bias Current
T
D
Parameter
Conditions
Min.
Typ.
Max.
Unit
T
J
= 25°C, I
O
= 1mA
V
CC
= 12V to 25V
I
O
= 1mA to 20mA
T
A
= 25°C
4.9
–
–
–
5.0
6
6
-100
5.1
20
25
-180
V
mV
mV
mA
T
J
= 25°C
V
CC
= 12V to 25V
V
PIN4
, Peak to Peak
T
J
= 25°C, Pin 4 = 2V
47
–
–
7.8
52
0.2
1.7
8.3
57
1
–
8.8
kHz
%
V
mA
Gain
(2)(3)
Maximum Input Signal
(2)
2.85
0.9
–
–
–
3
1.0
70
-2
100
3.15
1.1
–
-10
200
V/V
V
dB
μA
ns
V
PIN1
= 5V
V
CC
= 12V to 25V
Delay to Output
(1)
V
PIN3
= 0 V to 2V
ERROR AMPLIFIER SECTION
V
I
Input Voltage
I
BIAS
Input Bias Current
G
VO
GBW
Unity Gain Bandwidth
(1)
PSRR
PSRR
(1)
I
SINK
Output Sink Current
T
PIN1
= 2.5V
2.42
–
65
0.7
60
2
2.50
-0.3
90
1
70
6
2.58
-2
–
–
–
–
V
μA
dB
MHz
dB
mA
Open Loop Gain
(1)
V
O
= 2V to 4V
T
J
= 25°C
V
CC
= 12V to 25V
V
PIN2
= 2.7V
V
PIN1
= 1.1V
V
PIN2
= 2.3V
V
PIN1
= 5.0V
V
PIN2
= 2.3V, R1 = 15k to GND
V
PIN2
= 2.7V
R1 = 15k to Pin 8
I
SOURCE
Output Source Current
-0.5
-0.8
–
mA
V
OH
V
OL
Output High Voltage
Output Low Voltage
5
–
6
0.8
–
V
V
1.1
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