AXC-051
ACTIVE FILTER FOR RIPPLE ATTENUATION 5A
PRELIMINARY
September 98
Page 1 of 4
98004-05-004-06.doc
IXYS Corporation 3540 Bassett Street, Santa Clara, CA 95054 TEL:408-982-0700 FAX:408-496-0670
IXYS Semiconductor, GmbH. Edisonstr. 15 D-68623 Lampertheim, Germany TEL:+49-6206-503-0 FAX:+49-6206-503-627
Features :
High Efficiency.
Superior Performance at Low Frequencies.
Compact Size.
Low Cost.
AXC-051-R
AXC-051
Product Description
Ordering Information
The AXC-051 is a 3-terminal power filter which provide high attenuation starting at extremely low
frequencies (30dB@20Hz). The device is designed for negative supply of 18 to 75 Volts and up to
5Amp load. The output voltage tracks the DC input voltage with 0.75V drop. Full performance is
kept for input ripple of up to 1.4 Volts p-p. Exceptional effort has been made to maintain low output
impedance (less than 0.1 ohm at audio frequencies). The AXC filters are designed to meet the most
stringent noise requirements in electronic equipment, telecommunication systems, audio equipment,
etc.
Applications
Pin Description
Ultra Low Noise Switch Mode Power Supply
PIN
NAME
Description
Communication Systems.
1
COM
Common
Mixed signal
2
V
OUT
Output Voltage
3
V
IN
Input Voltage
(Analog Digital).
(3)
(1)
(2)
Top
View
Fig.1
Fig.2 - Typical Application
AXC051
OUT
COM
IN
3
2
1
C
2
Analog
Load
C
1
Digital
Load
18 - 72V -
+
+
-
-
Mixed Signal Negative Power Filter
AXC-051
PRELIMINARY
September 98
Page 2 of 4
98004-05-004-06.doc
IXYS Corporation 3540 Bassett Street, Santa Clara, CA 95054 TEL:408-982-0700 FAX:408-496-0670
IXYS Semiconductor, GmbH. Edisonstr. 15 D-68623 Lampertheim, Germany TEL:+49-6206-503-0 FAX:+49-6206-503-627
Absolute Maximum Ratings
Parameter
Conditions
Min
Max
Units
Supply Voltage
+0.5
-75
Vdc
Maximum Output Current
0
6
A
Storage Temperature
-30
110
C
Operating Temperature
-30
85
C
DC Electrical Specification (-30C
T
A
+85C)
Parameter
Conditions
Min
Typ
Max
Units
Operating Voltage
-18
-72
Vdc
Rated Current
0
5
A
T
A
=
+25C
0.73
Vdc
I
LOAD
=0A
-30C
T
A
+85C
0.70
Vdc
T
A
=
+25C
0.74
Vdc
I
LOAD
=1A
-30C
T
A
+85C
0.73
Vdc
T
A
=
+25C
0.76
Vdc
I
LOAD
=2A
-30C
T
A
+85C
0.75
Vdc
T
A
=
+25C
0.80
Vdc
Voltage Drop @ V
IN
= -48V
I
LOAD
=5A
-30C
T
A
+85C
0.79
Vdc
Quiescent Current
-18V
V
IN
-72V
0.38
0.42
0.52
mA
AC Electrical Specification (-30C
T
A
+85C)
Operating Voltage -(18
72)
V ; Output Current I
LOAD
=(0
5)A
Parameter
Conditions
Min
Typ
Max
Units
Insertion Loss*
20Hz
10KHz @ 50
55
60
dB
10Hz
10
KHz
9
15
30
m
Output Impedance*
10KHz
250
KHz
30
50
100
m
Line Transient Attenuation*
Transient voltage less than 0.75V
35
40
dB
Transient Output Impedance*
Idc=2A;
I=1A
70
110
m
* Tested with C1 & C2 [Fig.4] = 10uF Electrolytic Capacitor ; Maximum Input Noise Level = (1.3-0.1I
LOAD
[A])V
Attenuation (Vout[ac]/Vripple)
Test Setup
Fig.3
Load
I
Vin
LOAD
AXC051
OUT
COM
IN
3
2
1
R
1
C
2
V
OUT
C
1
A
V
V
A
V
IN
V
OUT
I
Quiescent
+
-
V
V
DROP
Vripple
Fig.4
AXC-051
PRELIMINARY
September 98
Page 3 of 4
98004-05-004-06.doc
IXYS Corporation 3540 Bassett Street, Santa Clara, CA 95054 TEL:408-982-0700 FAX:408-496-0670
IXYS Semiconductor, GmbH. Edisonstr. 15 D-68623 Lampertheim, Germany TEL:+49-6206-503-0 FAX:+49-6206-503-627
Thermal Resistance
Fig5. - Load Transient Response
Parameter
Typ
Max
Units
Junction-to-Case [
JC
R
]
1.0
C/W
Case-to-Sink [
CS
R
]
0.50
C/W
Junction-to-Ambient [
JA
R
]
62
C/W
General Specifications
Parameter
Units
Weight
9.0
0.5
gr.
Fig6. - Mechanical Drawing
a
b
c
d
R=e
g
f
h
n
w
s
m
k
mm
inch
min
max
min
max
a
4.90
5.90
0.193 0.232
b
2.62
2.87
0.103 0.113
c 10.29 10.54 0.405 0.415
d
1.22
1.32
0.048 0.052
e
1.40
1.50
0.055 0.059
f
0.97
1.01
0.038 0.040
g
4.40
5.40
0.173 0.213
h 13.80 14.20 0.543 0.559
k
3.54
3.78
0.139 0.149
m 5.20
6.20
0.205 0.244
n 21.00 22.60 0.827 0.890
s
2.39
2.69
0.094 0.106
w 18.10 18.60 0.713 0.732
a
b
c
d
R=e
g
f
h
n
w
s
m
k
mm
inch
min
max
min
max
a
4.90
5.90
0.193 0.232
b
2.62
2.87
0.103 0.113
c 10.29 10.54 0.405 0.415
d
1.22
1.32
0.048 0.052
e
1.40
1.50
0.055 0.059
f
0.97
1.01
0.038 0.040
g
5.50
6.40
0.217 0.252
h 13.80 14.20 0.543 0.559
k
3.54
3.78
0.139 0.149
m 19.25 20.16 0.758 0.794
n 21.00 22.60 0.827 0.890
s
2.39
2.69
0.094 0.106
w 18.10 18.60 0.713 0.732
AXC-051
PRELIMINARY
September 98
Page 4 of 4
98004-05-004-06.doc
IXYS Corporation 3540 Bassett Street, Santa Clara, CA 95054 TEL:408-982-0700 FAX:408-496-0670
IXYS Semiconductor, GmbH. Edisonstr. 15 D-68623 Lampertheim, Germany TEL:+49-6206-503-0 FAX:+49-6206-503-627
Typical Applications
AXC051
OUT
COM
IN
3
2
1
Switch-Mode
Power Supply
C1=10uF
C2=10uF
Fig7A. - Ultra Low Noise, High Efficiency
Switch-Mode Power Supply
AXC051
OUT
COM
IN
3
2
1
C
2
=10uF
Analog
Load
C
1
=10uF
18 - 72V
-
+
+
-
-
Fig7B. - Mixed Signal Negative Power Filter
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