HWD DC/DC Series Data Sheet
Features
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Applications
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Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
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75 Watts total output power
Wide input range 18V – 60V
Independent dual outputs
Flexible load sharing
Open-frame design with IMS board
Low profile – 12.7mm height
Start-up into high capacitive load
Output overcurrent protection (self restart)
Output overvoltage protection (self restart)
Overtemperature protection (self restart)
Setpoint accuracy ± 2.0%
Output voltage trim adjust, independent for
each output
Input/output isolation: 1500V
UL 1950 Recognition, CSA 22.2 No. 950-95
certification
Description
The HWD series provides onboard conversion of standard telecom and datacom input voltages into two isolated
low-voltage outputs. These products offer a unique combination of wide input range, low profile, and high current
capability. High efficiency and advanced thermal management enable these half-brick products to deliver full rated
power at 55°C ambient temperature, with 200 LFM airflow, without the addition of heatsinks.
Model Selection
Model
HWD075DGE-A
Input
Voltage
Range, VDC
18-60
Input
Current,
Max, ADC
5.5
Output
Voltage,
VDC
5.0/3.3
Output Rated
Current, ADC
15/15
Output Ripple
and Noise,
mV p-p
100
Efficiency %
81% @ 24Vin
79% @ 48Vin
NUCLEAR AND MEDICAL APPLICATIONS - Power-One products are not authorized for use as critical components in life support systems,
equipment used in hazardous environments, or nuclear control systems without the express written consent of the respective divisional
president of Power-One, Inc.
TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on
the date manufactured. Specifications are subject to change without notice.
REV. JUN 27, 2003
Page 1 of 12
HWD DC/DC Series Data Sheet
Table 1. Absolute Maximum Ratings
Parameter
Symbol
Min
Max
Units
Vi
Vi
Tb
-40
60
100
+100
VDC
VDC
°C
Input Voltage
Continuous
Transient (100 msec)
Operating Baseplate Temperature
Note 1
Storage Temperature
Tstg
-55
+125
°C
Input to Output Isolation
-
-
1500
VDC
Output Short Circuit Duration
-
-
Continuous
-
-
75
W
-
6
W
Total Output Power
Pomax
No Load Power Dissipation
Electrical Specifications
Unless otherwise indicated, specifications apply over all input voltages, resistive load, and Tbp=+40°C.
Table 2. Input Specifications
Parameter
Voltage Range
Maximum Input Current
Input Ripple Rejection (120 Hz)
Inrush Transient
Input Reflected Ripple (see figure 1)
Symbol
Vi
Ii
Min
18*
-
Typ
24/48
60
-
Max
60
5.5
1
250
Units
VDC
A
dB
2
As
mA p-p
• Module will operate within specification with an input voltage of 18 VDC, but must be turned on with an input voltage > 19.5 VDC.
See Undervoltage Lockout Specification.
Fusing Considerations
CAUTION
This DC-DC converter is not internally fused. An external input fuse must always be used.
REV. JUN 27, 2003
Page 2 of 12
HWD DC/DC Series Data Sheet
Table 3. Output Specifications
Parameter
Output Power
Output Voltage Set Point
(Vi=24VDC or Vi=48VDC,
Io1,Io2=7.5A)
Output Line Regulation:
(Vi=Vi,min to Vi,max)
(Io1, Io2=7.5A)
Output Load Regulation:
(Io,min to Io,max)
Output Temperature Regulation:
(Tbase =-40°C to +100°C)
Output Current
(Maximum output power limited to
75W)
Output Ripple (See Figure 2)
(DC to 20MHz)
(Io1,Io2 = 7.5A)
Output Current Limit inception
(Other outputs at no load)
Transient Response
(50% to 100% Load Step,
∆Io/∆t=0.1A/uSec)
Peak Deviation
Settling Time (Vo, 1% of Vo1)
Overvoltage Limit
Symbol
Po1
Po2
Po1+Po2
Vo1
Vo2
Min
4.9
3.23
Typ
5.0
3.3
Max
75
50
75
5.1
3.37
Units
W
W
W
VDC
VDC
Vo1,Vo2
-
0.05
0.2
%
Vo1,Vo2
-
0.5
1
%
All Outputs
-
0.02
0.05
%/°C
Io1
Io2
0.5
0.5
7.5
7.5
15
15
A
A
Vo1
Vo2
-
75
75
100
100
mVp-p
mVp-p
Io1
Io2
-
17
21
19
23
A
A
Vo1
Vo2
5.9
3.6
100
200
150
-
200
300
250
6.5
4.7
mV
mV
µsec
VDC
VDC
Vo1,clamp
Vo2,clamp
Table 4. Feature Specifications
Parameter
Remote On/Off, Primary side
Vlow
Vhigh
Sink Current-Logic Low
Turn-on time (Within 1% Vonom)
Switching Frequency
Output Voltage Adjust
Adjust Up
Adjust Down
Thermal Shutdown
Undervoltage Lockout
Turn-on
Turn-off
Symbol
Vo1
Vo2
Vo1
Vo2
Min
Typ
Max
Units
-
3.5
350
1
7
2
5
-
V
V
mA
msec
kHz
5.39
3.55
4.41
2.91
+105
5.5
3.63
4.5
2.97
5.61
3.71
4.59
3.03
+115
VDC
VDC
VDC
VDC
°C
16.5
19.2
16.8
19.5
-
V
V
REV. JUN 27, 2003
Page 3 of 12
HWD DC/DC Series Data Sheet
Table 5. Environmental
Parameter
Min
Typ
Max
Units
Operating Baseplate Temperature
-40
-
+100
°C
-
-
95
95
%
%
Operating Humidity (non-condensing)
Storage Humidity (non-condensing)
Table 6. Isolation Specifications
Parameter
Input to Each Output
Input to Baseplate
Output to Output
Resistance, Input - Output
Capacitance, Input - Output
Min
1500
1500
10
Typ
-
Max
-
Units
VDC
VDC
VDC
-
2200
-
pF
MΩ
Table 7. EMI and Regulatory Agency Compliance
Conducted Emissions
(With input filter configuration in Figure 3.)
Safety
CISPR 22 class A
UL60950 Recognized, CAN/CSA C22.2 No. 60950-00
Recognized
Table 8. General Specifications
Parameter
Efficiency η
(Vi=24VDC, Io1,Io2 = 7.5A)
(Vi=48VDC, Io1,Io2 = 7.5A)
Calculated MTBF (Po=60W, Tbp=40°C)
Min
Typ
Max
Units
79
77
81
79
-
%
-
900
-
kHrs
Table 9. Physical
Parameter
Dimensions
Weight
Markings & labeling
Units
0.50 (12.70)
in (mm)
2.4(68)
oz(g)
Includes Part Number, Power-One Logo, Date Code and
Country of Manufacture
2.30 (58.4)
REV. JUN 27, 2003
Page 4 of 12
2.40 (60.9)
HWD DC/DC Series Data Sheet
Mechanical Diagram
Pin
1
2
3
4
5
6
7
8
9
10
Function
-Vin
Case
On/Off
+Vin
+Vo2
+Vo2 Rtn
Trim 2
+Vo1
+Vo1 Rtn
Trim 1
Table 10. Ordering Information
Options
Remote On/Off
Trim
Pin Length
Suffixes to add to part number
Positive- Standard, no suffix required
Negative- Add “N” suffix
Negative- Standard, no suffix required
0.18”- Standard, no suffix required
0.11”- Add “8” suffix
0.15”- Add “9” suffix
Notes
1.
Consult factory for the complete list of available options.
REV. JUN 27, 2003
Page 5 of 12
HWD DC/DC Series Data Sheet
Test Setup
TO CURRENT PROBE
Vi(+)
Ltest
12 uH
BATTERY
Cs 220 uF
ESR < 0.1 OHM
@ 20 ºC, 100
kHz
22uF
ESR < 0.7 OHM
@ 20 ºC, 100 kHz
Vi(-)
Figure 1. Input Reflected Ripple Current Test Set-up
Note: Measure input reflected-ripple current with a simulated inductance (Ltest) of 12 µH. Capacitor Cs offsets possible battery
impedance. Measure current as shown above.
COPPER STRIPS (2 to 3 inches)
DUT
+Vo1
0.1uf
ceramic
22uF
Tantalum
0.1uf
ceramic
22uf
Tantalum
SCOPE
LOAD1
-Vo1
+Vo2
SCOPE
LOAD2
-Vo2
Figure 2. Output Ripple Measurement Test Set-up
Note: Use a 0.1µF ceramic and 22µF tantalum capacitor. Scope measurement should be made using a BNC socket. Position loads
between 51 mm and 76 mm (2 in. and 3 in.) from module.
REV. JUN 27, 2003
Page 6 of 12
HWD DC/DC Series Data Sheet
FC100V10
+
HWD15DGE
Vin+
Vo1
LOAD1
-Vo1
VIN
C1
C2
C3
C4
-
Vin-
GND
Vo2
LOAD2
-Vo2
C5
C6
CASE
Figure 3. Input Filter Configuration Required to Meet CISPR 22 Class A for Conducted Emissions
Table 11.Part List for Input Filter
Ref. Des
C1, 2
C3
C4
C5, 6
F1
Description
0.47uF @100V MLC Capacitor (1812)
100uF @ 100V Alum. Electrolytic Capacitor
22uF@ 100V Alum. Electrolytic Capacitor
0.01uF MLC Capacitor
FC100V10 Input Filter Module
Manufacture
AVX or Equivalent (Equiv.)
Nichicon NRSZ Series or Equiv.
United Chemicon KMG Series or Equiv.
AVX or Equiv.
Power-One
FEATURE DESCRIPTIONS
Output Overvoltage Clamp
The output overvoltage clamp consists of a separate control loop, independent of the primary control loop. This
control loop has a higher voltage setpoint than the primary loop. In a fault condition the converter goes into
“Hiccup Mode”, and the output overvoltage clamp ensures that the output voltage does not exceed Vo,clamp,max.
This secondary control loop provides a redundant voltage control that reduces the risk of output overvoltage.
Output Current Protection
To provide protection in an output overload or short circuit condition, the converter is equipped with current limiting
circuitry and can endure the fault condition for an unlimited duration. At the point of current-limit inception, the
converter goes into “Hiccup Mode”, causing the output current to be limited both in peak and duration. The
converter operates normally once the output current is brought back into its specified range.
Enable
Two enable options are available. Positive Logic Enable and Negative Logic Enable. Positive Logic Enable turns
the converter ON during a logic-high voltage on the enable pin, and OFF during a logic-low. Negative Logic Enable
turns the converter OFF during a logic-high and ON during a logic-low.
REV. JUN 27, 2003
Page 7 of 12
HWD DC/DC Series Data Sheet
Output Voltage Adjustment
Output voltage adjustment is accomplished by connecting an external resistor between the Trim Pin and either the
+Vo1 or –Vo1 Pins.
With an external resistor between the Trim Pin and +Vo1 Pin (Radj-down) the output voltage set point (Vo,adj)
decreases. The following equation determines the required external resistor value to obtain an adjusted output
voltage:
Radj, dn=
, adj - D) A
[ Vo(Vo, nom
-B ]
- Vo, adj
ohm
Where Radj-down is the resistance value and A, B, and D are defined in Table 7.
With an external resistor between the Trim Pin and –Vo1 Pin (Radj-up) the output voltage set point (Vo,adj)
increases. The following equation determines the required external resistor value to obtain an adjusted output
voltage:
Radj, up=
[ (Vo, adjA •-DD) - C - B ]
ohm
Where Radj-up is the resistance value and A, B, C, and D are defined in Table 12.
Table 12.Output Adjustment Variables
Output
Vo1
Vo2
A
4990
4990
B
2000
2000
C
2.5
0.8
D
2.5
2.5
THERMAL CONSIDERATIONS
The power converter operates in a variety of thermal environments: however, sufficient cooling should be provided
to help ensure reliable operation of the converter. Heat-dissipating components are thermally coupled to the case.
Heat is removed by conduction, convection, and radiation to the surrounding environment. Proper cooling can be
verified by measuring the case temperature.
Heat Transfer Characteristics
Increasing airflow over the converter enhances the heat transfer via convection. Figure 4 shows the maximum
power that can be dissipated by the converter without exceeding the maximum case temperature versus local
ambient temperature (TA) for natural convection through 400 ft/min.
Systems in which these converters are used generate airflow rates of 50 ft/min due to other heat dissipating
components in the system. Therefore, the natural convection condition represents airflow rates of approximately
50 ft/min. Use of Figure 4 is shown in the following example.
Example
What is the minimum airflow required for the device operating at 24 V, an output power of 60 W, and maximum
ambient temperature of 60 ºC.
Solution:
Given: Vi = 24 V, Po = 60 W, TA = 60 ºC.
Determine PD (Figure 4): PD = 13 W.
Determine airflow (Figure 4): v = 200 ft/min
REV. JUN 27, 2003
Page 8 of 12
HWD DC/DC Series Data Sheet
Natural
100 LFM
200 LFM
300 LFM
400 LFM
HWD15DGE - Power Derating
22
20
18
Power Dissipation (W)
16
14
12
10
8
6
4
2
0
0
10
20
30
40
50
60
70
80
90
100
Ambient Temperature (C)
Figure 4. Power Derating Curve
Vinmin
Vinnom1
Vinnom2
Vinmax
HWD15DGE Power Dissipation vs Output Power
20
18
16
14
Po
we
r 12
Di
ss
ip 10
ati
on
(W 8
)
6
4
2
0
0
10
20
30
40
50
Output Power (W)
Figure 5. Power Dissipation Vs. Output Power
REV. JUN 27, 2003
Page 9 of 12
60
70
HWD DC/DC Series Data Sheet
Vinmin
Vinnom1
Vinnom2
Vinmax
HWD15DGE Power Dissipation vs Full Load Power Distribution
20
18
16
14
Po
we
r 12
Di
ss
ip 10
ati
on
(W 8
)
6
4
2
0
15/0.5
7.5/7.5
0.5/15
Output Load, Io1/Io2 (A)
Figure 6. Power Dissipation Vs. Full-Load Distribution
Characteristic Curves
Tb = 40 ºC, nominal input voltage, and rated load unless otherwise specified.
Vinmin
Vinnom1
Vinnom2
Vinmax
HWD15DGE Efficiency vs Output Power
90
85
80
Eff
ici 75
en
cy
(%
) 70
65
60
55
0
10
20
30
40
50
Output Power (W)
Figure 7. Efficiency Vs. Output Power
REV. JUN 27, 2003
Page 10 of 12
60
70
HWD DC/DC Series Data Sheet
Vinmin
Vinnom1
Vinnom2
Vinmax
HWD15DGE Efficiency vs Full Load Power Distribution
90
88
86
84
Eff 82
ici
en
cy 80
(%
)
78
76
74
72
70
15/0.5
7.5/7.5
Output Load, Io1/Io2 (A)
Figure 8.Efficiency Vs. Full-Load Power Distribution
Figure 9. Typical Turn-ON Characteristics
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HWD DC/DC Series Data Sheet
Figure 10. Typical Turn-OFF Characteristics
REV. JUN 27, 2003
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