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APPLICATION NOTES
Rev. B
MPQ48S24-100
100 W DC-DC Converter
36-75 Vdc Input
24 Vdc Output at 4.17 A
Quarter-Brick Package
Features:
x Over 87% Efficient at Full Load
x Fast Transient Response
x Operation to No Load
x Output Trim +/-10%
x Remote ON/OFF
x Remote Sense Compensation
x Low Output Ripple
x
x
x
x
x
x
x
Fixed Switching Frequency
Output Over Current Protection
Output Short Circuit Protection
Over Temperature Protection
1500 VDC Isolation
100% Burn In
Heatsink Available
Description:
The MPQ series is a high density, low voltage input quarter brick converter that incorporates the
desired features required in today’s demanding applications while maintaining low cost. When
performance, reliability, and low cost are needed, the MPQ series delivers.
(888) 597-WALL
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1
WALL INDUSTRIES, INC.
APPLICATION NOTES
Rev. B
MPQ48S24-100
Model No. MPQ48S24-100
Technical Specifications
All specifications are based on 25C, Nominal Line and Full Load unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
Related condition
MIN
INPUT
Turn on at
Turn off at
Input Over voltage Shutdown
Turn off at
Turn on at
Operating Voltage Range
Maximum Input Current
No Load Input Current
Input Current under “LOGIC OFF”
Inrush Current Transient Rating
Reflected Ripple Current
OUTPUT
Output Voltage Set point
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Output Voltage Ripple and Noise
Basic Ripple
Spikes P-P
Output Current Ranges
Output Current Limit
Short Term Output Current Surge
DYNAMIC CHARACTERISTICS
Input Voltage Ripple Rejection
Output Transient and Load Changes
Load step / ' V
Load step / ' V
Recovery Time
Turn on Delay
Overshoot of Output Voltage
EFFICIENCY
@ 100% load
@ 75% load
@ 50% load
@ 25% load
TEMPERATURE CONSIDERATIONS
Thermal Resistance
Normal Convection
100 lfm
200 lfm
300 lfm
400 lfm
Heatsink Considerations
General Technical Data
Switching Frequency
Remote ON OFF Control
Trimmablility
Over Temperature Shutdown
MTBF
Rated Input Voltage
Low Line 100% load
36
12uH / 33 uF input filter
23.76
NOM
MAX
35
34
Volt DC
Volt DC
n/a
n/a
48
3
94
1
1
6
Volt DC
Volt DC
Volt DC
A
mA
mA
A2 Sec
mA
24
75
24.24
± 0.2
± 0.2
0.02
Rated Output Current
Self Resetting
0
4.59
Unit Measured
70
100
5.4
Volt DC
%
%
% / oC
200
200
4.17
6.2
mV
mV
A
A
A/sec
120 Hz
60
dB
50 to 75%
50 to 100%
75 to 50%
100 to 50 %
To within 1% Rated Vo
From Vin(nom) to 90% Vout (nom)
Full Load Resistive
130
90
50
25
0
mV
mV
Psec
msec
%
91
92
92
87
%
%
%
%
X
X
o
C/Watt
C/Watt
o
C/Watt
o
C/Watt
o
C/Watt
RTc-a
o
Available, Contact Factory
330
Fixed
Acitve HIGH or LOW
21.6
26.4
125
PCB Temperature
Bellcore TR-332
1.81 E6
KHz
High/Low TTL
Volt DC
o
C
Hours
Note: Positive Remote ON/OFF control is standard. To order negative logic Remote ON/OFF control add the suffix "R" to the part number.
(888) 597-WALL
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2
WALL INDUSTRIES, INC.
APPLICATION NOTES
Rev. B
MPQ48S24-100
Table 1: Pin Assignments
Pin #
1
2
3
4
5
6
7
8
Pin Name
+Vin
Enable
-Vin
+Vout
+SENSE
TRIM
-SENSE
-Vout
Function
Positive Input
Remote On/Off
Negative Input
Negative Output
Negative Remote Sense
Output Voltage Trim
Positive Remote Sense
Positive Output
Comments
If not used, leave open for standard unit, short to –Vin on ‘R’ units.
If not used, short to –Vo.
If not used, leave open.
If not used, short to +Vo.
Figure 1: Mechanical Dimensions
(Open Frame - no suffix)
3
-Vin
Ø.062 [1.57]
4
+ Vout
Ø.062 [1.57]
5
+ SENSE
Ø.040 [1.02]
6
TRIM
Ø.040 [1.02]
7
-SENSE
Ø.040 [1.02]
8
-Vout
Ø.062 [1.57]
2
3
3
.11 [2.8] REF
NOTES:
WALL INDUSTRIES
MODEL NAME
XXXX EXETER, NH 03833 XXXX
.30 [7.6]
.45 [11.4]
.15 [3.8]
.60 [15.2]
.00 [0.0]
4
5
6
7
8
.42 [10.7]
4
5
6
7
8
LABEL
INTERFACE-PLANE
Ø.040 [1.02]
1
2
.43 [10.8]
Ø.062 [1.57]
ON/OFF
1
INTERFACE-PLANE
+ Vin
2
.00 [0.0]
1.45 [36.8]
.42 [10.7]
PIN DESIGNATION PIN Ø
1
2.28 [57.9]
.30 [7.6]
.60 [15.2]
.00 [0.0]
.00 [0.0]
Unit: inches [mm]
.14 [3.6]
.19 [4.7]
1. PIN TO PIN TOLERANCE: ± .010 [± 0.25] MEASURED AT STANDOFF FEATURE ONLY, DATUM-B.
2. PIN DIAMETER TOLERANCE OF : ± .005 [± 0.13] MEASUREMENT READING APPLIES
TO AREA FROM INTERFACE-PLANE SURFACE DATUM-B TO END OF PIN ONLY.
3. UNLESS OTHERWISE SPECIFIED.
.00 [0.0]
INTERFACE-PLANE
A
.071± .005 [1.80± 0.13]
STANDOFF DIMENSION
Ø.040 [1.02] PINS ONLY 4X
RECOMMENDED FINISHED RECEIVING PCB
STAND-OFF HOLE Ø.052± .003 [1.32± 0.08]
PIN-2 SHOWN FOR DIMENSIONS
PIN END
B
.20 MIN [5.1 MIN]
SEE NOTE-3
PIN LENGTH FROM
INTERFACE-PLANE ONLY
2.00 [50.8]
UNLESS OTHERWISE SPECIFIED
ALL DIMENSONS ARE IN INCHES
[ XX ] ARE IN MILLIMETERS
APPLIED TOLERANCES:
(Cased Option - "C" suffix)
ANGLES= ± 1°
.XX= ± .02[0.5] .XXX= ± .010[0.25]
.60 [15.2]
.00 [0.0]
.45 [11.4]
.51 [13.0]
2.37 [60.2]
.30 [7.6]
DOT DENOTES
PIN-1
.15 [3.8]
.00 [0.0]
.30 [7.6]
.60 [15.2]
THIRD ANGLE PROJECTION
.00 [0.0]
DO NOT SCALE DRAWING
INTERPRET DIMENSION AND TOLERANCE
PER ASME Y14.5M - 1994
.00 [0.0]
.112(NO:4)-40UNC-2B 4X
MAX SCREW DEPTH .100 FROM SURFACE-A 4X
MAX APPLIED RECIEVING
TORQUE: 6.0 lbf in [ 0.68 N m]
Ø.062 [1.57]
+ SENSE
Ø.040 [1.02]
6
TRIM
Ø.040 [1.02]
7
-SENSE
Ø.040 [1.02]
8
-Vout
Ø.062 [1.57]
LABEL
NOTES:
1. PIN TO PIN TOLERANCE: ± .010 [± 0.25] MEASURED AT STANDOFF FEATURE ONLY, DATUM-B.
2. PIN DIAMETER TOLERANCE OF : ± .005 [± 0.13] MEASUREMENT READING APPLIES
TO AREA FROM INTERFACE-PLANE SURFACE DATUM-C TO END OF PIN ONLY.
3. UNLESS OTHERWISE SPECIFIED.
4. THERMAL TRANSFER PLATE MATERIAL: .040 [1.02] THICK, ALUMINUM ALLOY 3003-0,
PER: QQA 250/2 WITH BLACK SOFT SULFURIC ANODIZE FINISH.
1.860 [47.24]
SEE NOTE-4
-A-
.19 [4.7]
.005
.19 [4.7]
.00 [0.0]
INTERFACE-PLANE
C
.071± .005 [1.80± 0.13]
STANDOFF DIMENSION
Ø.040 [1.02] PINS ONLY 4X
RECOMMENDED FINISHED RECEIVING PCB
STAND-OFF HOLE Ø.052± .003 [1.32± 0.08]
PIN-2 SHOWN FOR DIMENSIONS
(888) 597-WALL
.47 [11.9]
INTERFACE-PLANE
+ Vout
5
3
3
4
5
6
7
8
.26 [6.5]
4
2
.60 [15.1]
Ø.062 [1.57]
4
5
6
7
8
1.030 [26.16]
.41 [10.4]
-Vin
XXXX
Ø.040 [1.02]
3
Ø.062 [1.57]
XXXX
ON/OFF
MODEL NAME
+ Vin
2
2
WALL INDUSTRIES
1
1
1
INTERFACE-PLANE
.47 [11.9]
PIN DESIGNATION PIN Ø
1.54 [39.1]
.26 [6.5]
PIN END
2.00 [50.8]
www.wallindustries.com
B
.20 MIN [5.1 MIN]
SEE NOTE-3
PIN LENGTH FROM
INTERFACE-PLANE ONLY
3
WALL INDUSTRIES, INC.
APPLICATION NOTES
Rev. B
MPQ48S24-100
Mechanical Dimensions (Heatsink Option - "HS" suffix)
Unit: inches [mm]
.60 [15.2]
.00 [0.0]
.30 [7.6]
.15 [3.8]
.51 [13.0]
2.37 [60.2]
.45 [11.4]
DOT DENOTES
PIN-1
.00 [0.0]
.00 [0.0]
.00 [0.0]
.30 [7.6]
.60 [15.2]
.112(NO:4)-40UNC-2B 4X
MAX SCREW DEPTH .100 FROM SURFACE-A 4X
MAX APPLIED RECIEVING
TORQUE: 6.0 lbf in [ 0.68 N m]
XXXX
3
1
3
.85 + .04 21.5 + 1.0
-0.5
-.02
.60 [15.1]
.41 [10.4]
.47 [11.9]
4
5
6
7
8
1.860 [47.24]
LABEL
INTERFACE-PLANE
4
5
6
7
8
2
-A-
.26 [6.5]
XXXX
XXXXXXXXXXXHS
WALL INDUSTRIES
2
INTERFACE-PLANE
1
1.54 [39.1]
1.030 [26.16]
.26 [6.5]
.47 [11.9]
1
4
5
6
7
8
2
3
NOTES:
1. PIN TO PIN TOLERANCE: ± .010 [± 0.25] MEASURED AT STANDOFF FEATURE ONLY, DATUM-B.
2. PIN DIAMETER TOLERANCE OF : ± .005 [± 0.13] MEASUREMENT READING APPLIES
TO AREA FROM INTERFACE-PLANE SURFACE DATUM-C TO END OF PIN ONLY.
3. STANDARD PIN LENGTH UNLESS OTHERWISE SPECIFIED.
4. THERMAL TRANSFER PLATE MATERIAL: .040 [1.02] THICK, ALUMINUM ALLOY 3003-0,
PER: QQA 250/2 WITH BLACK SOFT SULFURIC ANODIZE FINISH.
SEE NOTE-4
.005
PIN DESIGNATION PIN Ø
.19 [4.7]
A
.00 [0.0]
INTERFACE-PLANE
C
.071± .005 [1.80± 0.13]
STANDOFF DIMENSION
Ø.040 [1.02] PINS ONLY 6X
RECOMMENDED FINISHED RECEIVING PCB
STAND-OFF HOLE Ø.052± .003 [1.32± 0.08]
PIN END
B
.20 MIN [5.1 MIN]
SEE NOTE-3
PIN LENGTH FROM
INTERFACE-PLANE ONLY
2.00 [50.8]
.19 [4.7]
(888) 597-WALL
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1
+ Vin
Ø.040 [1.02]
2
ON/OFF
Ø.040 [1.02]
3
-Vin
Ø.040 [1.02]
4
+ Vout
Ø.062 [1.57]
5
+ SENSE
Ø.040 [1.02]
6
TRIM
Ø.040 [1.02]
7
-SENSE
Ø.040 [1.02]
8
-Vout
Ø.062 [1.57]
4
WALL INDUSTRIES, INC.
APPLICATION NOTES
Rev. B
MPQ48S24-100
OUTPUT POWER (WATTS)
DERATING CURVE
120
100
80
60
40
20
0
0
20
40
60
80
AMBIENT TEMPERATURE (DEG. C.)
POWER DISSIPATION (WATTS
POWER DISSIPATION VS OUTPUT CURRENT
15
Low
Line
13
11
Nominal
Line
9
7
5
High
Line
3
1
0.00
0.43
0.85
1.28
1.70
2.13
2.55
2.98
3.40
3.83
4.25
OUTPUT CURRENT (AMPS)
EFFICIENCY (%)
EFFICIENCY VS OUTPUT CURRENT
95
90
85
80
75
70
65
60
55
50
45
40
0.00
Low Line
Nominal
Line
High
Line
0.43
0.85
1.28
1.70
2.13
2.55
2.98
3.40
3.83
4.25
OUTPUT CURRENT (AMPS)
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WALL INDUSTRIES, INC.
Rev. B
APPLICATION NOTES
MPQ48S24-100
TYPICAL OUTPUT RIPPLE
50mV/div, 1uS/div, full load, 36Vin
10uF // 0.1uF decoupling caps room temp
TYPICAL OUTPUT RIPPLE
50mV/div, 1uS/div, full load 75Vin
10uF // 0.1uF decoupling cap room temp
TYPICAL INPUT RIPPLE CURRENT
2mA/div, 1uS/div, full load 48Vin at
room temp with a 12 uH / 33 uF input filter
TYPICAL TRANSIENT RESPONSE
50mV/div, 200uS/div, 50% full load
to 100% full load 48Vin room temp
TYPICAL RISE TIME & TURN-ON DELAY
USING LOGIC ENABLE
2V/div, 4mS/div (Vout), 1V/div 4mS/div (logic
enable) 36Vin, full load at room temp
TYPICAL RISE TIME & TURN-ON DELAY
WITH Vin 0-48V
1V/div, 4mS/div (Vout), 10V/div, 4mS/div (Vin)
at room temp
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WALL INDUSTRIES, INC.
APPLICATION NOTES
Rev. B
MPQ48S24-100
Ordering Information:
Part Number Example:
MPQ 48 S 24 – 100 R
Series
Designation
Nominal
Input
Voltage Single
Output
Nominal
Output
Voltage
Maximum
Output
Power
Options
R
C
HS
Leave Blank for no Options
Active Low
Case
Heatsink
Company Information:
Wall Industries, Inc. has created custom and modified units for over 40 years. Our in-house research and development engineers will
provide a solution that exceeds your performance requirements on-time and on budget. Our ISO9001-2000 certification is just one
example of our commitment to producing a high quality, well documented product for our customers.
Our past projects demonstrate our commitment to you, our customer. Wall Industries, Inc. has a reputation for working closely with its
customers to ensure each solution meets or exceeds form, fit and function requirements. We will continue to provide ongoing support for
your project above and beyond the design and production phases. Give us a call today to discuss your future projects.
Contact Wall Industries for further information:
Phone:
Toll Free:
Fax:
E-mail:
Web:
Address:
(888) 597-WALL
(603)778-2300
(888)587-9255
(603)778-9797
[email protected]
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
www.wallindustries.com
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