概述
数据手册DH48D12-40 概述
2:1 Wide Input Voltage Ranges
DH48D12-40 数据手册
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Rev. A
DH40 SERIES
2:1 Wide Input Voltage Ranges
Single & Dual Outputs, Efficiency up to 92%
2.0” x 1.0” x 0.4” Encapsulated Shielded Metal Package
40 Watt DC/DC Power Converters
FEATURES
RoHS Compliant
2.0” x 1.0” x 0.4” Package Size
Trimmable Output Voltage
40 Watts Output Power
2:1 Wide Input Voltage Ranges
Single & Dual Outputs
Shielded Metal Case with Isolated Base-plate
-40°C to +80°C Operating Temperature Range
Over Load, Short Circuit, Over Voltage, and Over
Temperature Protection
Remote ON/OFF Control
1500VDC I/O Isolation
High Efficiency up to 92%
Under Voltage Lockout (UVLO)
UL/IEC/EN 60950-1 Safety Approvals (Pending)
Heatsink (Optional)
DESCRIPTION
The DH40 series is the latest generation of high performance DC/DC converters setting a new standard
concerning power density. These converters offer 40 Watts of continuous output power in a 2.0” x 1.0” x 0.4”
encapsulated, shielded metal package. The DH40 series has single and dual output models with 2:1 wide input
voltage ranges of 9-18VDC, 18-36VDC, and 36-75VDC. Advanced circuit topology provides a very high
efficiency up to 92% and an operating temperature range of -40°C to +80°C. Further features include remote
on/off, trimmable output voltage, under-voltage lockout as well as over load, over voltage, short circuit, and over-
temperature protection. These converters are RoHS compliant and are ideal for use in battery operated equipment,
instrumentation, distributed power architectures in communication and industrial electronics and many other space
critical applications.
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
10/31/2012
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
SPECIFICATIONS: DH40 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
INPUT SPECIFICATIONS
TEST CONDITIONS
Min
Typ
Max
Unit
VDC
VDC
VDC
12VDC nominal input models
9
18
36
-0.7
-0.7
-0.7
12
24
48
18
36
75
25
50
100
9
Input Voltage Range
24VDC nominal input models
48VDC nominal input models
12VDC nominal input models
24VDC nominal input models
48VDC nominal input models
12VDC nominal input models
24VDC nominal input models
48VDC nominal input models
12VDC nominal input models
24VDC nominal input models
48VDC nominal input models
Input Surge Voltage (1s max.)
Start-up Threshold Voltage
Under Voltage Lockout (UVLO)
18
36
8.3
16.5
33
VDC
ms
Power Up
Remote On/Off
30
30
Start-up Time
Input Current
Nominal Vin and constant resistive load
See Table
Reflected Ripple Current (Page 11)
See Table
Internal Filter
for EN55022 Class A compliance see page 3
12VDC nominal input models
24VDC nominal input models
LC Filter
8000mA slow-blow type
4000mA slow-blow type
2000mA slow-blow type
Hiccup mode 1.5Hz typ.
Input Fuse (Note 3)
48VDC nominal input models
Short Circuit Current
OUTPUT SPECIFICATIONS
Output Voltage
Output Voltage Balance
Line Regulation
See Table
±2.0
Dual Output Models, Balanced loads
Low line to high line at full load
Single Output Models
%
%
±0.5
±0.5
±1.0
Load Regulation
Minimum load to full load
%
Dual Output Models
Load Cross Regulation (Dual Output Models)
Output Voltage Setting Accuracy
Output Voltage Trim (Page 10)
Output Power
Asymmetrical load 25% / 100% full load
At 50% load and nominal Vin
% of nominal output voltage
±5.0
±1.0
%
%Vnom
%
±10
See Table
Output Current
See Table
Single Output Models
Dual Output Models
No minimum load required
Minimum Load
See Table
100
150
3.3 & 5VDC Output Models
12, 15, & 24VDC Output Models
Dual Output Models
Measured with a 1µF M/C
and a 10µF T/C in parallel
Ripple & Noise (0-20MHz) (Page 12)
mVp-p
150
Transient Recovery Time (Note 2)
Temperature Coefficient
PROTECTION
25% load step change
250
µs
%/°C
±0.02
Input Polarity Protection
Over Voltage Protection (page 11)
Over Load Protection
none
See Table
Current limitation at 150% typ. of Io max., hiccup
Thermal Protection
Shutdown temperature
110
°C
Short Circuit Protection
REMOTE ON/OFF (Page 11)
Hiccup, automatic recovery
Converter On
Positive Logic
3.5~12V or open circuit
0V ~ 1.2 or short circuit
Converter Off
On
Control Input Current
Off
Control Common
Vctrl = 5.0V
Vctrl = 0V
0.5
-0.5
mA
mA
Referenced to negative input
2.5
Stand-by Input Current
Nominal Vin
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 2 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
SPECIFICATIONS: DH40 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
GENERAL
TEST CONDITIONS
Min
Typ
Max
Unit
Efficiency
(see efficiency curves on pages 6~8)
See Table
Switching Frequency
Isolation Voltage (Input to Output)
Isolation Resistance
320
KHz
VDC
MΩ
pF
60 seconds
500VDC
100kHz, 1V
1500
1000
Isolation Capacitance
1500
Maximum Capacitive Load
ENVIRONMENTAL SPECIFICATIONS
See Table
3.3VDC Output Models
5, 12, & 15VDC Output Models
Dual Output Models
3.3VDC Output Models
5, 12, & 15VDC Output Models
Dual Output Models
-40
-40
-40
-40
-40
-40
12.0
9.0
8.0
6.0
10.0
5.4
4.5
3.0
+66
+46
+40
+73
+57
+52
Operating Temperature (W/O Heatsink)
(see derating curves on page 5)
Natural air convection (20LFM)
Nominal Vin and full load
°C
°C
Operating Temperature (W/ Heatsink)
(see derating curves on page 5)
Natural air convection (20LFM)
Nominal Vin and full load
Natural convection (20LFM)
100LFM convection
200LFM convection
400LFM convection
Natural convection (20LFM)
100LFM convection
Thermal Impedance (W/O Heatsink)
Thermal Impedance (W/ Heatsink)
°C/W
°C/W
200LFM convection
400LFM convection
Case Temperature
Storage Temperature
Humidity (non-condensing)
RFI
+105
+125
95
°C
°C
% RH
-50
Six-sided shielded metal case
natural convection
260
Cooling
Natural convection is about 20LFM and is not still air (0LFM)
1.5mm from case for 10 seconds
MIL-HDBK-217F at 25°C, Ground Benign
Lead Temperature
MTBF (calculated)
PHYSICAL SPECIFICATIONS
Weight
°C
hours
328,000
1.06oz (30g)
Dimensions (L x W x H)
Case Material
Base Material
Potting Material
Pin Material
Heatsink (optional)
SAFETY
2.0 x 1.0 x 0.43 inches (50.8 x 25.4 x 11 mm)
Aluminum alloy, black anodized coating
FR4 PCB (flammability to UL 94V-0 rated)
Epoxy (UL94-V0)
Copper alloy with gold plate over nickel underplate
See page 9
Safety Approvals (pending)
UL/cUL 60950-1 recognition (CSA certificate), IEC/EN 60950-1 (CB-scheme)
EMI-FILTER TO MEET EN55022, CLASS A; FCC PART 15, LEVEL A
Conducted and Radiated Emissions EN55022 Class A
C3
C3
-INPUT
+INPUT
-INPUT
+INPUT
-OUTPUT
COMMON
+OUTPUT
DH40 Module
Single Output
DH40 Module
Dual Output
-OUTPUT
+OUTPUT
C1
C1
C2
C2
Part No
DH12SXX-40
DH24SXX-40
DH48SXX-40
Part No
DH12DXX-40
DH24DXX-40
DH48DXX-40
C1
10µF/25V 1812 MLCC 4.7µF/50V 1812 MLCC 2.2µF/100V 1812 MLCC
C1
10µF/25V 1812 MLCC
4.7µF/50V 1812 MLCC 2.2µF/100V 1812 MLCC
C2, C3 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC
C2, C4 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC 1000pF/2KV 1808 MLCC
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 3 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
MODEL SELECTION TABLE
SINGLE OUTPUT MODELS
Output Current
Input Current
Output
Voltage
Reflected Ripple Over Voltage Output
Current (Typ)
Maximum
Capacitive Load
Model Number Input Voltage
Efficiency
Protection
3.9 VDC
6.2 VDC
15 VDC
18 VDC
30 VDC
3.9 VDC
6.2 VDC
15 VDC
18 VDC
30 VDC
3.9 VDC
6.2 VDC
15 VDC
18 VDC
30 VDC
Power
26.4W
40W
40W
40W
40W
26.4W
40W
40W
40W
40W
26.4W
40W
40W
40W
40W
Min
Max
No Load Max Load
DH12S3.3-26
DH12S5-40
3.3 VDC
5 VDC
0mA
8A
120mA
160mA
160mA
150mA
160mA
75mA
80mA
85mA
75mA
85mA
40mA
50mA
50mA
50mA
50mA
2.47A
3.75A
3.75A
3.7A
89%
89%
89%
90%
88%
90%
91%
91%
91%
90%
90%
91%
92%
92%
90%
21000µF
13600µF
2400µF
1500µF
600µF
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
0mA
8A
12 VDC
DH12S12-40
50mA
12 VDC
15 VDC
24 VDC
3.3 VDC
5 VDC
3.33A
2.67A
1.67A
8A
(9 – 18 VDC)
DH12S15-40
DH12S24-40
DH24S3.3-26
DH24S5-40
3.79A
1.22A
1.83A
1.83A
1.83A
1.85A
610mA
920mA
910mA
910mA
920mA
21000µF
13600µF
2400µF
1500µF
600µF
8A
24 VDC
DH24S12-40
30mA
12 VDC
15 VDC
24 VDC
3.3 VDC
5 VDC
3.33A
2.67A
1.67A
8A
(18 – 36 VDC)
DH24S15-40
DH24S24-40
DH48S3.3-26
DH48S5-40
21000µF
13600µF
2400µF
1500µF
600µF
8A
48 VDC
DH48S12-40
20mA
12 VDC
15 VDC
24 VDC
3.33A
2.67A
1.67A
(36 – 75 VDC)
DH48S15-40
DH48S24-40
DUAL OUTPUT MODELS
Output Current
Input Current
Output
Voltage
Reflected Ripple Over Voltage Output
Maximum (1)
Capacitive Load
Model Number Input Voltage
Efficiency
Current (Typ)
Protection
±15 VDC
±18 VDC
±15 VDC
±18 VDC
±15 VDC
±18 VDC
Power
40W
40W
40W
40W
40W
40W
Min Max
No Load Max Load
DH12D12-40
12 VDC
±12 VDC ±145mA ±1.67A
±15 VDC ±110mA ±1.33A
±12 VDC ±145mA ±1.67A
±15 VDC ±110mA ±1.33A
±12 VDC ±145mA ±1.67A
±15 VDC ±110mA ±1.33A
70mA
60mA
50mA
45mA
65mA
65mA
3.79A
3.79A
1.87A
1.87A
940mA
940mA
88%
88%
89%
89%
89%
89%
1200µF*
750µF*
1200µF*
750µF*
1200µF*
750µF*
50mA
(9 – 18 VDC)
DH12D15-40
DH24D12-40
24 VDC
30mA
20mA
(18 – 36 VDC)
DH24D15-40
DH48D12-40
48 VDC
(36 – 75 VDC)
DH48D15-40
NOTES
1. “*” for each output
2. Transient recovery time is measured to within 1% error band for a step change in output load from 75% to 100%.
3. All DC/DC converters should be externally fused at the front end for protection.
4. To order the converter with a heatsink, please add the suffix “HS” to the model number. (Ex: DH12S12-40HS)
5. To order the converter without Remote on/off control, please add the suffix “N” to the model number. (Ex: DH12S12-40N)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
10/31/2012
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 4 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
POWER DERATING CURVES
DHXXS3.3-26 Derating Curve without Heatsink
DHXXS3.3-26 Derating Curve with Heatsink
100
80
60
40
20
0
100
80
60
40
20
0
Natural
Convection
20LFM
Natural
Convection
20LFM
100LFM
200LFM
400LFM
100LFM
200LFM
400LFM
~
~
-40
0
20
40
60
80
100 110
-40
0
20
40
60
80
100 110
Ambient Temperature (°C)
Ambient Temperature (°C)
DHXXS5-40, DHXXS12-40, DHXXS15-40
Derating Curve without Heatsink
DHXXS5-40, DHXXS12-40, DHXXS15-40
Derating Curve with Heatsink
100
80
60
40
20
0
100
80
60
40
20
0
Natural
Convection
20LFM
Natural
Convection
20LFM
100LFM
200LFM
400LFM
100LFM
200LFM
400LFM
~
~
-40
0
20
40
60
80
100 110
-40
0
20
40
60
80
100 110
Ambient Temperature (°C)
Ambient Temperature (°C)
DHXXDXX-40
DHXXDXX-40
Derating Curve without Heatsink
Derating Curve with Heatsink
100
80
60
40
20
0
100
80
60
40
20
0
Natural
Convection
20LFM
Natural
Convection
20LFM
100LFM
200LFM
400LFM
100LFM
200LFM
400LFM
~
~
-40
0
20
40
60
80
100 110
-40
0
20
40
60
80
100 110
Ambient Temperature (°C)
Ambient Temperature (°C)
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 5 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
EFFICIENCY CURVES @ 25°C (12VDC INPUT MODELS)
DH12S3.3-26 Efficiency vs Load Current
DH12S5-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
9V
9V
12V
18V
12V
18V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
DH12S12-40 Efficiency vs Load Current
DH12S15-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
9V
9V
12V
18V
12V
18V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
DH12D12-40 Efficiency vs Load Current
DH12D15-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
9V
9V
12V
18V
12V
18V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 6 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
EFFICIENCY CURVES @ 25°C (24VDC INPUT MODELS)
DH24S3.3-26 Efficiency vs Load Current
DH24S5-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
18V
24V
36V
18V
24V
36V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
DH24S12-40 Efficiency vs Load Current
DH24S15-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
18V
24V
36V
18V
24V
36V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
DH24D12-40 Efficiency vs Load Current
DH24D15-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
18V
24V
36V
18V
24V
36V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 7 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
EFFICIENCY CURVES @ 25°C (48VDC INPUT MODELS)
DH48S3.3-26 Efficiency vs Load Current
DH48S5-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
36V
48V
75V
36V
48V
75V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
DH48S12-40 Efficiency vs Load Current
DH48S15-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
36V
48V
75V
36V
48V
75V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
DH48D12-40 Efficiency vs Load Current
DH48D15-40 Efficiency vs Load Current
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
36V
48V
75V
36V
48V
75V
10
20
30
40
50
60
70
80
90 100
10
20
30
40
50
60
70
80
90 100
% of Full Load
% of Full Load
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 8 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
MECHANICAL DRAWING
Unit: inches (mm)
0.40
0.20 0.20
(10.16) (5.08) (5.08)
PIN CONNECTIONS
3
2
1
Pin
1
Single Output
+Vin
Dual Output
+Vin
2
-Vin
-Vin
3
Remote On/Off
+Vout
Remote On/Off
+Vout
4
5
-Vout
Common
-Vout
6
Trim
Bottom View
Tolerance: X.XX 0.01 (X.X 0.25)
X.XXX 0.005 (X.XX 0.13)
Pin Diameter: Ø0.04 0.002 (Ø1.0 0.05)
0.91 (23.2)
5
Physical Characteristics
Case Size: 2.0 x 1.0 x 0.43 inches (50.8 x 25.4 x 11 mm)
Case Material: Aluminum alloy, black anodized coating
Base Material: FR4 PCB (flammability to UL 94V-0 rated)
Pin Material: Copper alloy with gold plate over nickel underplate
Potting Material: Epoxy (UL94-V0)
0.04 (1.1)
4
6
0.40
0.40
0.22
(10.16)
(10.16)
0.10 (2.54)
(5.5) 0.43 (11.0)
Weight: 1.06oz (30g)
1.00 (25.4)
Heatsink Option (“HS” Suffix)
Unit: inches (mm)
Physical Characteristics
Heatsink Material: Aluminum
Finish: Black Anodized Coating
Weight: 0.3oz (9g)
Advantages of Adding a Heatsink
1. To help heat dissipation and increase the stability and
reliability of DC/DC converters at high operating temperature
atmosphere.
2. To upgrade the operating temperature of DC/DC converters,
please refer to Derating Curves.
1.22 (31.0) max
0.71 (18.0) max
Heatsink
Thermal pad
Clamp
Converter
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 9 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
EXTERNAL OUTPUT TRIM
Output can be externally trimmed by using the method shown below
Trim Up
Trip Down
3
2
1
3
2
1
DH40 Module
Bottom View
DH40 Module
Bottom View
5
4
5
4
6
6
Rup
Rdown
DHXXS3.3-26 TRIM TABLE
DHXXS5-40 TRIM TABLE
Trim
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
Trimup
3.333V
3.366V
3.399V
3.432V
3.465V
3.498V
3.531V
3.564V
3.597V
3.630V
Rup
Trimdown
3.267V
3.234V
3.201V
3.168V
3.135V
3.102V
3.069V
3.036V
3.003V
2.970V
Rdown
63.59kΩ
30.28kΩ
18.19kΩ
11.95kΩ
8.13kΩ
5.56kΩ
3.70kΩ
2.31kΩ
1.21kΩ
0.34kΩ
Trim
Trimup
5.050V
5.100V
5.150V
5.200V
5.250V
5.300V
5.350V
5.400V
5.450V
5.500V
Rup
Trimdown
4.950V
4.900V
4.850V
4.800V
4.750V
4.700V
4.650V
4.600V
4.550V
4.500V
Rdown
45.53kΩ
20.61kΩ
12.31kΩ
8.15kΩ
5.66kΩ
4.00kΩ
2.81kΩ
1.92kΩ
1.23kΩ
0.68kΩ
70.50kΩ
29.28kΩ
16.87kΩ
10.90kΩ
7.38kΩ
5.06kΩ
3.42kΩ
2.20kΩ
1.25kΩ
0.49kΩ
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
36.57kΩ
16.58kΩ
9.92kΩ
6.59kΩ
4.59kΩ
3.25kΩ
2.30kΩ
1.59kΩ
1.03kΩ
0.59kΩ
DHXXS12-40 TRIM TABLE
DHXXS15-40 TRIM TABLE
Trim
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
Trimup
12.120V
12.240V
12.360V
12.480V
12.600V
12.720V
12.840V
12.960V
13.080V
13.200V
Rup
Trimdown
11.880V
11.760V
11.640V
11.520V
11.400V
11.280V
11.160V
11.040V
10.920V
10.800V
Rdown
Trim
1%
2%
3%
4%
5%
6%
7%
8%
9%
10%
Trimup
15.150V
15.300V
15.450V
15.600V
15.750V
15.900V
16.050V
16.200V
16.350V
16.500V
Rup
Trimdown
14.850V
14.700V
14.550V
14.400V
14.250V
14.100V
13.950V
13.800V
13.650V
13.500V
Rdown
368.92kΩ
161.92kΩ
94.97kΩ
61.86kΩ
42.12kΩ
29.00kΩ
19.66kΩ
12.66kΩ
7.23kΩ
394.50kΩ
179.74kΩ
106.08kΩ
68.86kΩ
46.39kΩ
31.36kΩ
20.60kΩ
12.51kΩ
6.21kΩ
392.98kΩ
182.12kΩ
108.73kΩ
71.43kΩ
48.85kΩ
33.71kΩ
22.86kΩ
14.69kΩ
8.33kΩ
572.67kΩ
248.63kΩ
145.60kΩ
94.97kΩ
64.87kΩ
44.92kΩ
30.72kΩ
20.10kΩ
11.86kΩ
5.28kΩ
2.89kΩ
1.17kΩ
3.23kΩ
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 10 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
TEST CONFIGURATIONS
Input Reflected-Ripple Current Test Setup
Input reflected-ripple current is measured with an inductor Lin (4.7µH) and Cin (220µF, ESR < 1.0Ω at 100 KHz)
to simulate source impedance. Capacitor Cin offsets possible battery impedance.
Current ripple is measured at the input terminals of the module. Measurement bandwidth is 0-500 KHz.
To Oscilloscope
+Vin
+Out
+
+
Lin
DC/DC
Converter
Current
Probe
Load
Battery
Cin
-Vin
-Out
Peak-to-Peak Output Noise Measurement Test
Use a 1µF ceramic capacitor and a 10µF tantalum capacitor. Scope measurement should be made by using a BNC
socket, measurement bandwidth is 0-20MHz. Position the load between 50mm and 75mm from the DC/DC
converter.
Copper Strip
Cout
+Vin
+Out
Copper Strip
+Vin
+Out
Com.
-Out
Scope
Scope
Single Output
Dual Output
DC/DC
Converter
Resistive
Load
Resistive
Load
Cout
Scope
DC/DC
Copper Strip
Cout
Converter
-Vin
-Out
Copper Strip
-Vin
Copper Strip
DESIGN & FEATURE CONSIDERATIONS
Remote On/Off
Positive logic remote on/off turns the module on during a logic high voltage on the remote on/off pin and off during
a logic low. To turn the module on and off, the user must supply a switch to control the voltage between the on/off
terminal and the –Vin terminal. The switch can be an open collector or equivalent. A logic low is 0V to 1.2V. A
logic high is 3.5V to 12V. The maximum sink current at on/off terminal (Pin 3) during a logic low is -100µA
Over Current Protection
To provide protection in a fault (output overload) condition, the unit is equipped with internal current limiting
circuitry and can endure overload for an unlimited duration.
Over Voltage Protection
The output over voltage clamp consists of control circuitry which is independent of the primary regulation loop that
monitors the voltage on the output terminals. The control loop of the clamp has a higher voltage set point than the
primary loop. This provides a redundant voltage control that reduces the risk of output over voltage. The OVP level
can be found in the model selection table.
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
10/31/2012
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 11 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
Input Source Impedance
The power module should be connected to a low ac-impedance input source. Highly inductive source impedances
can affect the stability of the power module.
In applications where power is supplied over long lines and output loading is high, it may be necessary to use a
capacitor at the input to ensure startup.
Capacitor mounted close to the power module helps ensure stability of the unit, it is recommended to use a good
quality low Equivalent Series Resistance (ESR < 1.0Ω at 100 KHz) capacitor of 33µF for the 12V input devices
and a 10µF for the 24V and 48V devices.
+
+Vin
+Out
+
DC/DC
Converter
DC Power
Source
Load
Cin
-
-Vin
-Out
Output Ripple Reduction
A good quality low ESR capacitor placed as close as possible across the load will give the best ripple and noise
performance. To reduce output ripple, it is recommended to use 4.7µF capacitors at the output.
+
+Vin
-Vin
+Out
+
+Vin
+Out
Com.
-Out
Load
Load
Single Output
Dual Output
DC/DC
Converter
Cout
Cout
DC Power
Source
DC Power
Source
DC/DC
Converter
Cout
Load
-
-Out
-
-Vin
Maximum Capacitive Load
The DH40 series has a limitation of maximum connected capacitance on the output. The power module may be
operated in current limiting mode during start-up, affecting the ramp-up and the start-up time. The maximum
capacitance can be found in the model selection table.
Thermal Considerations
Many conditions affect the thermal performance of the power module, such as orientation, airflow over the module,
and board spacing. To avoid exceeding the maximum temperature rating of the components inside the power
module, the case temperature must be kept below 105°C. The derating curves are determined from measurements
obtained in a test setup.
Position of air velocity
50mm / 2in
Air Flow
DUT
probe and thermocouple
15mm / 0.6in
COMPANY INFORMATION
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
10/31/2012
Page 12 of 13
DH40 Series
Single & Dual Outputs
2:1 Wide Input Ranges
Rev. A
40 Watt DC/DC Power Converters
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:
(603)778-2300
(888)587-9255
(603)778-9797
E-mail:
Web:
Address:
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
10/31/2012
Page 13 of 13
DH48D12-40 相关器件
| 型号 | 制造商 | 描述 | 价格 | 文档 |
| DH48D12-40N | WALL | DC-DC Regulated Power Supply Module, | 获取价格 |
|
| DH48D15-40 | WALL | 2:1 Wide Input Voltage Ranges | 获取价格 |
|
| DH48D15-40N | WALL | DC-DC Regulated Power Supply Module, | 获取价格 |
|
| DH48S12-33HS | WALL | 50 Watt DC/DC Power Converters | 获取价格 |
|
| DH48S12-40 | WALL | 2:1 Wide Input Voltage Ranges | 获取价格 |
|
| DH48S12-50 | WALL | 50 Watt DC/DC Power Converters | 获取价格 |
|
| DH48S12-50HS | WALL | 50 Watt DC/DC Power Converters | 获取价格 |
|
| DH48S15-33HS | WALL | 50 Watt DC/DC Power Converters | 获取价格 |
|
| DH48S15-40 | WALL | 2:1 Wide Input Voltage Ranges | 获取价格 |
|
| DH48S15-40HS | WALL | DC-DC Regulated Power Supply Module, | 获取价格 |
|
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