AMC3842B Datasheet, PDF (4/10 Pages) List of Unclassifed Manufacturers – CURRENT MODE PWM CONTROLLER

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
V_CC / V_C
30
Input Voltage
V_I,R_T/C_T
0
5.5
V_I,I_SENSE/V_FB
Output Voltage
V_O, Output
0
30
Supply Current
I_CC
25
Average Output Current
I_O
200
Reference Output Current
I_O(REF)
-20
Timing Capacitor
C_T
1
Oscillator Frequency
f_OSC
100
500
Operating Free-air Temperature
T_A
0
70
Units
V
V
V
mA
mA
mA
nF
KHz
O_C
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperature for AMC384XB with
0^OC ≤ TA ≤70 ^OC; V_CC = 15V(note 6); R_T = 10K;C_T = 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
V_REF
I_SC
T_J = 25 ^OC, I_REF = 1mA
12V ≤ V_CC ≤ 25V,T_J = 25 ^OC
1mA ≤ I_REF ≤ 20mA
T_J = 25 ^OC
Oscillator Section
Oscillation Frequency
f T_J = 25 ^OC
Frequency Change with Voltage
Frequency Change with Temperature
(note 7)
12V ≤ V_CC ≤ 25V
T_MIN ≤ T_A ≤ T_MAX
Peak-to-peak Amplitude At R_T/C_T
V_OSC
Current Sense Section
Gain (note 8 & 9)
A_VOL
Maximum Input Signal (note 8)
V_I(MAX)
Power Supply Rejection Ratio (note 8) PSRR
Input Bias Current
I_BIAS
COMP = 5V
12V ≤ V_CC ≤ 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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