AMC3843B 데이터 시트보기 (PDF) - Unspecified
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AMC3843B Datasheet PDF : 10 Pages
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AMC DOC. #: AMC3842B_C (LF)
March 2004
AMC3842B/43B
CURRENT MODE PWM CONTROLLER
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Recommended Operating Conditions
Min.
Typ.
Max.
Supply Voltage
VCC / VC
30
Input Voltage
VI,RT/CT
0
5.5
VI,ISENSE/VFB
Output Voltage
VO, Output
0
30
Supply Current
ICC
25
Average Output Current
IO
200
Reference Output Current
IO(REF)
-20
Timing Capacitor
CT
1
Oscillator Frequency
fOSC
100
500
Operating Free-air Temperature
TA
0
70
Units
V
V
V
mA
mA
mA
nF
KHz
OC
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperature for AMC384XB with
0OC ≤ TA ≤70 OC; VCC = 15V(note 6); RT = 10K;CT = 3.3nF. Low duty cycle pulse testing techniques are used which
maintains junction and case temperatures equal to the ambient temperature.
Parameter
Symbol
Test Conditions
AMC384XB
Units
Min. Typ. Max.
Reference Section
Reference output Voltage
Line Regulation
Load Regulation
Short Ciruit Output Current
VREF
ISC
TJ = 25 OC, IREF = 1mA
12V ≤ VCC ≤ 25V,TJ = 25 OC
1mA ≤ IREF ≤ 20mA
TJ = 25 OC
Oscillator Section
Oscillation Frequency
f TJ = 25 OC
Frequency Change with Voltage
Frequency Change with Temperature
(note 7)
12V ≤ VCC ≤ 25V
TMIN ≤ TA ≤ TMAX
Peak-to-peak Amplitude At RT/CT
VOSC
Current Sense Section
Gain (note 8 & 9)
AVOL
Maximum Input Signal (note 8)
VI(MAX)
Power Supply Rejection Ratio (note 8) PSRR
Input Bias Current
IBIAS
COMP = 5V
12V ≤ VCC ≤ 25V (note 8)
4.9 5.0 5.1 V
6 20 mV
6 25 mV
-30 -100 -180 mA
52
KHz
0.2 1.0 %
5
%
1.7
V
2.85 3.00 3.15 V/V
0.9 1.0 1.1 V
70
dB
-3.0 -10 µA
Copyright © 2002, ADD Microtech Corp.
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