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KA3843AC Datasheet(PDF) 2 Page - Fairchild Semiconductor

Part # KA3843AC
Description  SMPS Controller
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

KA3843AC Datasheet(HTML) 2 Page - Fairchild Semiconductor

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KA3843AC
2
Absolute Maximum Ratings
Electrical Characteristics
(VCC = 15V, RT = 10KW, CT = 3.3nF, TA = 0
°C to +70°C ,Unless otherwise specified)
Notes:
1. These parameters, although guaranteed, are not 100% tested in production.
2. Parameter measured at trip point of latch with VFB = 0V.
3. Gain defined as:
Parameter
Symbol
Value
Unit
Supply voltage
VCC
30
V
Output current
IO
+1
A
Analog inputs (pin2, 3)
VI(ANA)
-0.3 to 6.3
V
Error amp. output sink current
ISINK(EA)
10
mA
Power dissipation
PD
1W
Parameter
Symbol
Conditions
Min.
Typ.
Max.
Unit
REFERENCE SECTION
Output voltage
VREF
TJ = 25
°C, IO = 1mA
4.9
5.0
5.1
V
Line regulation
RLine
VCC = 12V to 25V
-
6
20
mV
Load regulation
RLOAD
IO = 1mA to 20mA
-
6
25
mV
Output short circuit
ISC
Ta = 25
°C
-
-100
-180
mA
OSILLATOR SECTION
Initial accuracy
FOSC
TJ = 25
°C47
52
57
kHz
Voltage stability
STV
VCC = 12V to 25V
-
0.2
1
%
Amplitude
VOSC
VPIN4, peak to peak
-
1.7
-
V
Discharge current
IDISCHG
TJ = 25
°C
7.8
8.3
8.8
mA
CURRENT SENSE SECTION
Gain
GV
(Note2, 3)
2.85
3
3.15
V/V
Maximum input signal
VI(MAX)
VPIN1 = 5V(Note2)
0.9
1.0
1.1
V
PSRR
PSRR
VCC = 12V to 25V (Note1, 2)
-
70
-
dB
Input bias current
IBIAS
VSENSE=0V
-
-2
-10
uA
Delay to output
TD
VPIN3 = 0 V to 2V (Note1)
-
100
200
ns
G
V
∆V
CO MP
∆V
SE NSE
------------------------- OV
SENSE
0.8V
≤≤
;
=


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