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KA3842AE датащи(PDF) 3 Page - Fairchild Semiconductor

номер детали KA3842AE
подробное описание детали  SMPS Controller
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производитель  FAIRCHILD [Fairchild Semiconductor]
домашняя страница  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA3842AE датащи(HTML) 3 Page - Fairchild Semiconductor

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KA3842AC/KA3842AE Rev. 1.0.1
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.
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
30
V
IO
Output Current
±1
A
VI(ANA)
Analog Inputs (Pins 2, 3)
-0.3 to 6.3
V
ISINK(EA)
Error Amp. Output Sink Current
10
mA
PD
Power Dissipation
1
W
R
θja
Thermal Resistance, Junction-to-Air(4)
95
°C/W
Electrical Characteristics
(VCC = 15V, RT = 10k¾, CT = 3.3nF, TA = 0°C to +70°C, unless otherwise specified)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
REFERENCE SECTION
VREF
Output Voltage
TJ = 25°C, IO = 1mA
4.9
5.0
5.1
V
ΔVREF
Line Regulation
VCC = 12V to 25V
6
20
mV
Load Regulation
IO = 1mA to 20mA
6
25
mV
ISC
Output Short Circuit
TA = 25°C
-100
-180
mA
OSILLATOR SECTION
FOSC
Initial Accuracy
TJ = 25°C
47
52
57
kHz
STV
Voltage Stability
VCC = 12V to 25V
0.2
1
%
VOSC
Amplitude
VPIN4, Peak to Peak
1.7
V
IDISCHG
Discharge Current
TJ = 25°C, Pin 4 = 2V
7.8
8.3
8.8
mA
CURRENT SENSE SECTION
GV
Gain(2)(3)
2.85
3
3.15
V/V
VI(MAX)
Maximum Input Signal(2)
VPIN1 = 5V
0.9
1.0
1.1
V
PSRR
PSRR(1)(2)
VCC = 12V to 25V
70
dB
IBIAS
Input Bias Current
-2
-10
µA
TD
Delay to Output(1)
VPIN3 = 0 V to 2V
100
200
ns
ERROR AMPLIFIER SECTION
VI
Input Voltage
TPIN1 = 2.5V
2.42
2.50
2.58
V
IBIAS
Input Bias Current
-0.3
-2
µA
GVO
Open Loop Gain(1)
VO = 2V to 4V
65
90
dB
GBW
Unity Gain Bandwidth(1)
TJ = 25°C
0.7
1
MHz
PSRR
PSRR(1)
VCC = 12V to 25V
60
70
dB
ISINK
Output Sink Current
VPIN2 = 2.7V
VPIN1 = 1.1V
2
6
mA
ISOURCE
Output Source Current
VPIN2 = 2.3V
VPIN1 = 5.0V
-0.5
-0.8
mA
VOH
Output High Voltage
VPIN2 = 2.3V, R1 = 15k¾ to GND
5
6
V
VOL
Output Low Voltage
VPIN2 = 2.7V
R1 = 15k¾ to Pin 8
0.8
1.1
V


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