AMC3842B Datasheet, PDF (6/11 Pages) List of Unclassifed Manufacturers – CURRENT MODE PWM CONTROLLER

AMC3842B/43B/44B/45B
CHARACTERIZATION CURVES
Below characterization curves was referenced by Fig.4
Oscillator Discharge Current vs.
Tem perature
Maximum Output Duty Cycle vs. Timing
Resistor
9
Vcc=15V
8.5
Vosc=2V
Idischg 8
(mA)
7.5
7
-50 -25 0 25 50 75 100 125
TA(ºC)
100
90
80
Dmax 70
(%) ₆₀
50
40
0
Idischg=7.5mA
Idischg=8.8mA
Vcc=15V
Ct=3.3mF
T_A=25ºC
12345678
R_T (KΩ)
Error Amp Open-Loop Gain and Phase vs.
Frequency
Current Sense Input Threshold vs.
Error Amp Output Voltage.
100
80
60
(dB) ⁴⁰
Gain
Phase
20
Vcc=15V
0 Vo=2V to 4V
-20 ^RL=100K
10 100 1K
10K 100K ^1M
f(Hz)
Ø
1.2
30
1
T_A=25ºC
60
0.8
90
Vth _0.6
(V)
T_A=125ºC
120
0.4
150
0.2
T_A=-40ºC
Vcc=15V
180
0
01 23 456 78
Vo(V)
Reference Voltage Change vs. Source
C urre nt .
60
Vcc=15V
50
40
30
20
TA=125ºC TA=25ºC
10
TA=-40ºC
0
0 20 40 60 80 100 120
Iref(mA)
Copyright © 2006 ADDtek Corp.
Reference Short Circuit Current vs.
Temperature.
110
100
90
Isc₈₀
(mA)
70
Vcc=15V
RL≤0.1Ω
60
50
-50 -25 0 25 50 75 100 125 150
TA(ºC)
6
DD019_F -- OCTOBER 2006