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DATASHEET
Rev C
DCQEB125 SERIES
2:1 Input Voltage Ranges
Industry Standard Quarter-Brick Package
Up to 100 Watts, Single Outputs
DC/DC Power Converters
FEATURES
 Up to 125 Watts Output Power
 Single Outputs
 Output Current up to 35A
 Industry Standard Quarter-Brick Package: 2.28” x 1.45” x 0.50”
 Under Voltage Lockout
 Fixed Switching Frequency
 Input to Output Isolation: 1600VDC
APPLICATIONS





Telecom/Datacom
Wireless Networks
Industry Control Systems
Semiconductor Equipment
Distributed Power Architectures
OPTIONS
 Heatsinks
 Pin Lengths
 Thru-Hole Inserts
 Negative Logic Remote ON/OFF
 2:1 Wide Input Voltage Range
 High Efficiency up to 90%
 No Minimum Load Required
 Adjustable Output Voltage
 Threaded Inserts and Thru-Hole Inserts Available
 Short Circuit, Over Voltage, Over Current, and Over Temp. Protection
 Compliant to RoHS EU Directive 2002/95/EC
 CE Mark Meets 2006/95/CE, 93/68/EEC, and 2004/108/EC
 UL60950-1, EN60950-1, and IEC60950-1 Safety Approvals (See Note 12)
DESCRIPTION
The DCQEB125 series of DC/DC power converters provides up to 125 Watts of output power in an industry standard 2.28”
x 1.45” x 0.50” quarter-brick package and footprint. This series consists of single output models with 2:1 input voltage
ranges of 18-36VDC or 36-75VDC. Some features include high efficiency up to 90%, adjustable output voltage, remote
sense, and positive or negative remote ON/OFF control. This series is RoHS compliant and has UL60950-1, EN60950-1,
and IEC60950-1 safety approvals (see note 12). Several different options are available for this series including negative
remote ON/OFF control, heatsinks, pin lengths, and thru-hole inserts. Please call factory for more details.
03/13/2012
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 5
DCQEB125 Series
125W, Single Outputs
Quarter-Brick Package
DC/DC Power Converters
Rev C
SPECIFICATIONS: DCQEB125 SERIES
All specifications are based on 25°C, Nominal Input Voltage, and Maximum Output Current unless otherwise noted.
We reserve the right to change specifications based on technological advances.
SPECIFICATION
TEST CONDITIONS
Min
Nom
Max
18
36
24
48
36
75
18
36
Unit
INPUT SPECIFICATIONS
Input Voltage Range
Start-up Voltage
Shutdown Voltage
Input Surge Voltage
Input Current
Input Filter
OUTPUT SPECIFICATIONS
Output Voltage
Line Regulation
Load Regulation
Voltage Accuracy
Voltage Adjustability (See Note 5)
Output Power
Output Current
Minimum Load
Ripple & Noise
Transient Response Recovery Time
Power Up
Start-Up Time
Remote ON/OFF
Remote Sense (See Note 5)
Temperature Coefficient
PROTECTION
Over Voltage Protection Threshold
Over Current Protection Threshold
Short Circuit Protection
Over Temperature Protection
GENERAL SPECIFICATIONS
Efficiency
Switching Frequency
Input to Output
Isolation Voltage
Input to Base-plate
Output to Base-plate
Isolation Resistance
Isolation Capacitance
REMOTE ON/OFF (See Note 6)
DC/DC ON
Positive Logic (standard)
DC/DC OFF
DC/DC ON
Negative Logic (optional)
DC/DC OFF
Input Current of Remote Control Pin
Remote Off Input Current
ENVIRONMENTAL SPECIFICATIONS
Operating Base-Plate Temperature (See Note 7)
Storage Temperature
Relative Humidity
Thermal Shock
Vibration
MTBF (See Note 1)
24VDC nominal input models
48VDC nominal input models
24VDC nominal input models
48VDC nominal input models
24VDC nominal input models
48VDC nominal input models
24VDC nominal input models
48VDC nominal input models
15
32
50
100
VDC
+0.2
+0.3
+1.5
+10
%
%
%
%
See Table
L-C Type
See Table
Low line to high line at full load
No load to full load
-0.2
-0.3
-1.5
-20
See Table
See Table
0
Measured at nominal input and full load with 20MHz BW and
1µF M/C and 10µF T/C capacitors in parallel.
25% load step change
%
100
mVp-p
200
25
25
Nominal input and constant resistive load
10
-0.02
Non-latching Hiccup
110
+0.02
120
140
Hiccup, automatic recovery
+110
Nominal input and full load
270
297
2500
Nominal input
Nominal input
µs
ms
ms
% Vo
%/°C
% Vo
% Io
°C
See Table
243
1600
1000
1000
10
For 1 minute
For 1 minute
For 1 minute
-0.5
Open or 3V < Vr < 15V
Short or 0V < Vr < 1.2V
Short or 0V < Vr < 1.2V
Open or 3V < Vr < 15V
1
2.5
KHz
VDC
VDC
VDC
MΩ
pF
mA
mA
-40
-55
5
Non-condensing
BELLCORE TR-NWT-000332
MIL-HDBK-217F
+100
°C
+125
°C
95
% RH
MIL-STD-810F
10~55Hz, 2G, 30 minutes along X, Y, and Z
2,500,000
Hours
125,700
Hours
1.46oz (42g)
2.28 x 1.45 x 0.50 inches (57.9 x 36.8 x 12.7 mm)
Aluminum base-plate
Safety Approvals
03/13/2012
VDC
VDC
100ms
PHYSICAL SPECIFICATIONS
Weight
Dimensions (L x W x H)
Case Material
SAFETY & EMC CHARACTERISTICS
EMI (See Note 8)
Radiated Immunity
Fast Transient (See Note 9)
Surge (See Note 9)
Conducted Immunity
VDC
EN55022
EN61000-4-3
EN61000-4-4
EN61000-4-5
EN61000-4-6
UL60950-1, IEC60950-1, EN60950-1
(DCQEB125-48S1.8, 48S2.5, 48S3.3, and 48S05 have approvals; approvals pending for all other models)
Class A
10 V/m
Perf. Criteria A
±2KV
Perf. Criteria B
±1KV
Perf. Criteria B
10 Vrms
Perf. Criteria A
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 2 of 5
DCQEB125 Series
125W, Single Outputs
Quarter-Brick Package
DC/DC Power Converters
Rev C
MODEL SELECTION TABLE
Input Voltage
Range
Model Number (12)
DCQEB125-24S3.3
DCQEB125-24S05
24VDC
DCQEB125-24S12
(18 - 36 VDC)
Output Current
Output
Voltage
Min. load
Full load
3.3 VDC
0mA
30A
5 VDC
0mA
25A
Ripple & Noise (4)
Input Current
Output Power
Efficiency (4)
4970mA
99W
87%
6127mA
125W
89%
No Load (3)
Full Load (2)
100mVp-p
90mA
100mVp-p
165mA
12 VDC
0mA
10.42A
100mVp-p
50mA
6129mA
125W
89%
DCQEB125-24S15
15 VDC
0mA
8.33A
100mVp-p
60mA
6125mA
125W
89%
DCQEB125-48S1.8
1.8 VDC
0mA
35A
100mVp-p
65mA
1641mA
63W
84%
DCQEB125-48S2.5
2.5 VDC
0mA
35A
100mVp-p
50mA
2223mA
87.5W
86%
DCQEB125-48S3.3
48 VDC
3.3 VDC
0mA
30A
100mVp-p
75mA
2455mA
99W
88%
DCQEB125-48S05
(36 - 75 VDC)
5 VDC
0mA
25A
100mVp-p
110mA
3028mA
125W
90%
DCQEB125-48S12
12 VDC
0mA
10.42A
100mVp-p
40mA
3029mA
125W
90%
DCQEB125-48S15
15 VDC
0mA
8.33A
100mVp-p
40mA
3027mA
125W
90%
NOTES
1. BELLCORE TR-NWT-000332. Case 1: 80% Stress, Temperature at 40°C.
MIL-HDBK-217F Notice2 @Ta=25°C, Full load (Ground, Benign, controlled environment).
2. Maximum value at nominal input voltage and full load.
3. Typical value at nominal input voltage and no load.
4. Typical value at nominal input voltage and full load.
5. Maximum output deviation is +10% inclusive of trim. If remote sense is not being used the +SENSE should be connected to its corresponding
+OUTPUT and likewise the -SENSE should be connected to its corresponding –OUTPUT.
6. The remote ON/OFF control pin voltage is referenced to –INPUT. To order negative logic Remote ON/OFF control add the suffix “R” to the model
number (Ex: DCQEB125-48S05R).
7. Heatsink is optional and P/N: 7G-0029A-F, 7G-0030A-F, 7G-0031A-F, and 7G-0032A-F.
8. The DCQEB125 series meets EN55022 Class A and Class B only with external components added before the input pins to the converter.
9. An external input filter capacitor is required if the module has to meet EN61000-4-4 and EN61000-4-5. We recommend Nippon chemi-con KY series,
220µF/100V, ESR 48mΩ.
10. BASE-PLATE GROUNDING: EMI can be reduced when you connect the four screw bolts to the shield plane.
11. The converter is provided with basic insulation.
12. Safety Approvals: DCQEB125-48S1.8, 48S2.5, 48S3.3, and 48S05 have safety approvals; approvals pending for all other models.
13. This series comes with several different options: Negative remote ON/OFF control, pin lengths, thru-hole inserts, and heatsinks.
CAUTION: The power module is not internally fused. An input line fuse must always be used.
DERATING
DCQEB125-48S05 Derating Curve
With Heatsink 7G-0029A-F
DCQEB125-48S05 Derating Curve
120
120
0 LFM
0 LFM
100 LFM
200 LFM
80
300 LFM
400 LFM
60
500 LFM
40
20
0
-40
100 LFM
100
Output Power (%)
Output Power (%)
100
200 LFM
80
300 LFM
400 LFM
60
500 LFM
40
20
-27
-20
0
20
40
60
80
100
120
0
-40
-20
-10
Ambient Temperature (°C)
03/13/2012
0
20
40
60
80
100
120
Ambient Temperature (°C)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 3 of 5
DCQEB125 Series
125W, Single Outputs
Quarter-Brick Package
DC/DC Power Converters
Rev C
CHARACTERISTICS
DCQEB125-48S05 Efficiency vs Output Load
95
91
90
90
85
EFFICIENCY(%)
EFFICIENCY(%)
DCQEB125-48S05 Efficiency vs Input Voltage
92
89
88
87
75
70
65
86
85
80
60
36
40
44
48
52
56
60
64
68
72
10
75
20
30
40
50
60
70
80
90
100
Output Load (% of Full Load)
Input Voltage (VDC)
Recommended Filter for EN55022 Class B Compliance
C10
C12
+Vin
C1 C2
C3
L2
C7 C8
C9
DCQEB125-24Sxx
C2
6.8µF/50V
C7
6.8µF/50V
C12
1.0nF/3KV
L2
224µH
C3
6.8µF/50V
C8
6.8µF/50V
C13
1.0nF/3KV
C4
6.8µF/50V
C9
6.8µF/50V
C14
1.0nF/3KV
C5
1.5nF/3KV
C10
0.1µF/50V
C15
1.0nF/3KV
DCQEB125-48Sxx
C1
100µF/100V
C6
1.5nF/3KV
C11
0.1µF/50V
L1
620µH
C2
1.5µF/100V
C7
47µF/100V
C12
1.0nF/3KV
L2
620µH
C3
1.5µF/100V
C8
1.5µF/100V
C13
1.0nF/3KV
C4
1.5µF/100V
C9
1.5µF/100V
C14
1.0nF/3KV
C5
1.5nF/3KV
C10
0.1µF/50V
C15
1.0nF/3KV
C14
C6
L1
C1
6.8µF/50V
C6
1.5nF/3KV
C11
0.1µF/50V
L1
622µH
+Vin
CASE
+Vo
-Vin
CASE
-Vo
C4
-Vin
C5
C13
C15
C11
CHASSIS GROUND
SHIELD PLANE
Recommended EN55022 Class B Filter Circuit Layout
DCQEB
SERIES
03/13/2012
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 4 of 5
DCQEB125 Series
125W, Single Outputs
Quarter-Brick Package
DC/DC Power Converters
Rev C
MECHANICAL DRAWING
Unit: inches (mm)
2.28 (57.9)
0.21
(5.3)
1.860 (47.24)
0.150 (3.81)
1.030 (26.16)
0.450 (11.43)
0.600 (15.24)
7
PIN CONNECTIONS
FUNCTION
PIN Ø
-INPUT
Ø.040 (1.02)
CTRL
Ø.040 (1.02)
+INPUT
Ø.040 (1.02)
-OUTPUT
Ø.060 (1.52)
-SENSE
Ø.040 (1.02)
TRIM
Ø.060 (1.52)
+SENSE
Ø.040 (1.02)
+OUTPUT
Ø.060 (1.52)
PIN
1
2
3
4
5
6
7
8
3
8
0.300
(7.62)
6
2
5
0.300
(7.62)
BOTTOM VIEW
0.300
(7.62)
1.45 (36.8)
1
4
0.43 (10.9)
0.024 (0.6)
1. Tolerance: X.XX±0.02 (X.X±0.5)
X.XXX±0.01 (X.XX±0.25)
2. Pin Pitch Tolerance: ±0.01 (±0.25)
0.14
(3.6)
0.20
(5.1)
2.000 (50.80)
3. Pin Dimension Tolerance: ±0.004 (±0.1)
0.50 (12.7)
Threaded (Standard) 4-M3X0.5
Thru-Hole (Option) 4-Ø0.126 (Ø3.2)
PRODUCT OPTIONS
SUFFIX
0.200” pin length
none
0.145” pin length
S
0.200” pin length
R
Negative remote ON/OFF logic
0.145” pin length
RL
Ø0.126 (Ø3.2) thru-hole
(1)
Thru-Hole Inserts
TH
(no thread) inserts
NOTES
1. Models with thru-hole inserts cannot be equipped with a heatsink.
Positive remote ON/OFF logic
PRODUCT OPTIONS
7G-0029A-F
7G-0030A-F
Heatsinks
7G-0031A-F
7G-0032A-F
SUFFIX
EXTERNAL OUTPUT TRIMMING
H
H1
H2
H3
Output can be externally trimmed by
using the method shown below.
TRIM UP
TRIM DOWN
7
6
RU
6
RD
5
COMPANY INFORMATION
Wall Industries, Inc. has created custom and modified units for over 50 years. Our in-house research and development
engineers will provide a solution that exceeds your performance requirements on-time and on budget. Our ISO9001-2008
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:
03/13/2012
(603)778-2300
(888)587-9255
(603)778-9797
sales@wallindustries.com
www.wallindustries.com
5 Watson Brook Rd.
Exeter, NH 03833
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 5 of 5