amc3842b ADDtek Corp, amc3842b Datasheet - Page 6

• Manufacturer Part Number: amc3842b
• Description: Current Mode Controller
• Manufacturer: ADDtek Corp

Idischg
(mA)
Copyright © 2006 ADDtek Corp.
Below characterization curves was referenced by Fig.4
(dB)
8.5
7.5
100
60
50
40
30
20
10
-20
80
60
40
20
0
9
8
7
0
-50
R e fe re nc e Vol t a ge C ha nge vs. S ourc e
0
10
Error Amp Open-Loop Gain and Phase vs.
O s cillator D is charge Current vs .
Vcc=15V
Vo=2V to 4V
RL=100K
-25
TA=125ºC
20
100
0
40
Gain
Tem perature
1K
Frequency
C urre nt .
25
TA=25ºC
TA(ºC)
Iref(mA)
f(Hz)
60
10K
50
100K
80
75
Phase
Vcc=15V
Vcc=15V
Vosc=2V
100
1M
CHARACTERIZATION CURVES
TA=-40ºC
100
120
125
90
120
150
180
30
60
Ø
Dmax
(%)
(mA)
Vth
(V)
Isc
6
110
100
90
80
70
60
50
100
90
80
70
60
50
40
1.2
0.8
0.6
0.4
0.2
-50
1
0
0
0
Maximum Output Duty Cycle vs. Timing
Reference Short Circuit Current vs.
C urre nt S e nse Input Thre shol d vs.
T
-25
A
=125ºC
T
1
1
AMC3842B/43B/44B/45B
Error Amp Out put Vol t a ge .
A
Idischg=7.5mA
=25ºC
0
2
2
Temperature.
Idischg=8.8mA
T
25
A
=-40ºC
Resistor
3
3
TA(ºC)
R
50
T
Vo(V)
4
(
4
K
Ω
75
)
5
5
100 125 150
DD019_F -- OCTOBER 2006
Vcc=15V
RL≤0.1Ω
Vcc=15V
Ct=3.3mF
T
6
Vcc=15V
6
A
=25ºC
7
7
8
8