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Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
Features
* * * * * * * * * * * * 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 re-start) Output overvoltage protection (self re-start) Overtemperature protection (self re-start) 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
Applications
* * * * Distributed power architectures Telecommunications equipment LAN/WAN applications Data processing applications
* *
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 55C ambient temperature, with 200 LFM airflow, without the addition of heatsinks.
Selection Chart
Model 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 %
HWD075DGE-A
81% @ 24Vin 79% @ 48Vin
REV. 9/01 www.power-one.com
Page 1 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
Absolute Maximum Ratings Table 1. Parameter Symbol
Input Voltage Continuous Transient (100 msec) Operating Baseplate Temperature Note 1 Storage Temperature Input to Output Isolation Output Short Circuit Duration Total Output Power No Load Power Dissipation Vi Vi Tb Tstg Pomax
Min
-40 -55 -
Max
60 100 +100 +125 1500 Continuous 75 6
Units
Vdc Vdc
C C
Vdc W W
Electrical Specifications
Unless otherwise indicated, specifications apply over all input voltages, resistive load, and Tbp=+40C.
Table 2. Input Specifications Parameter Symbol
Voltage Range Maximum Input Current Input Ripple Rejection (120Hz) Inrush Transient Input Reflected Ripple (see figure 1) Fusing considerations Vi Ii
Min
18* -
Typ
24/48 60 -
Max
60 5.5 1 250
Units
Vdc A dB A2s mAp-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.
Caution: This DC-DC converter is not internally fused. An external input fuse must always be used.
Table 3. Output Specifications Symbol Parameter
Output Power Po1 Po2 Po1+Po2 Vo1 Vo2 Vo1,Vo2
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) REV. 9/01
Min 4.9 3.23 -
Typ 5.0 3.3 0.05
Max 75 50 75 5.1 3.37 0.2
Units W W W Vdc Vdc %
Vo1,Vo2
-
0.5
1
% Page 2 of 15
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Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
Output Temperature Regulation: (Tbase =-40C to +100C) 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, All Outputs Io1 Io2 Vo1 Vo2 Io1 Io2 0.5 0.5 0.02 7.5 7.5 75 75 17 21 0.05 15 15 100 100 19 23 %/C A A mVp-p mVp-p A A
Io/t=0.1A/uSec)
Peak Deviation Settling Time (Vo, 1% of Vo1) Overvoltage Limit Vo1 Vo2 Vo1,clamp Vo2,clamp 5.9 3.6 100 200 150 200 300 250 6.5 4.7 mV mV sec Vdc Vdc
Table 4. Feature Specifications Parameter Symbol
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
Min
-
Typ
3.5 350 5.5 3.63 4.5 2.97
Max
1 7 2 5 5.61 3.71 4.59 3.03 +115 19.5 -
Units
V V mA msec kHz Vdc Vdc Vdc Vdc
Vo1 Vo2 Vo1 Vo2
5.39 3.55 4.41 2.91 +105 16.5
C
V V
19.2 16.8
Table 5. Environmental Parameter
Operating Baseplate Temperature Operating Humidity (non-condensing) Storage Humidity (non-condensing)
Min
-40 -
Typ
-
Max
+100 95 95
Units C
% %
REV. 9/01 www.power-one.com
Page 3 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output Table 6. Isolation Specifications Parameter Min
Input to Each Output Input to Baseplate Output to Output Resistance, Input - Output Capacitance, Input - Output 1500 1500 10 -
Typ
2200
Max
-
Units
Vdc Vdc Vdc M pF
Table 7. EMI & 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
(Vi=24Vdc, Io1,Io2 = 7.5A) (Vi=48Vdc, Io1,Io2 = 7.5A) Calculated MTBF (Po=60W, Tbp=40C)
Min
79 77 -
Typ
81 79 900
Max
-
Units
% kHrs
Table 7. Physical Parameter
Dimensions Weight Markings & labeling
Units 2.30(58.4) 2.40(60.9 ) 0.50(12.70 ) In. (mm) 2.4(68) oz(g) Includes Part Number, Power-One Logo, Date Code and Country of Manufacture
REV. 9/01 www.power-one.com
Page 4 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
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
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. 2. 3. Consult factory for the complete list of available options. 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 President of Power-One, Inc. Specifications are subject to change without notice.
REV. 9/01 www.power-one.com
Page 5 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
Test Setup
TO CURRENT PROBE
Ltest 12 uH BATTERY Cs 220 uF ESR < 0.1 OHM @ 20 C, 100 kHz 22uF ESR < 0.7 OHM @ 20 C, 100 kHz
Vi(+)
Vi(-)
Figure 1 Input Reflected Ripple Current Test Set-up: Note: Measure input reflected-ripple current with a simulated inductance (Ltest) of 12 uH. Capacitor Cs offsets possible battery impedance. Measure current as shown above.
DUT
+Vo1
COPPER STRIPS (2 to 3 inches)
0.1uf ceramic -Vo1
22uF Tantalum
SCOPE
LOAD1
+Vo2 0.1uf ceramic -Vo2 22uf Tantalum SCOPE LOAD2
Figure 2: Output Ripple Measurement Test Set-up: Note: Use a 0.1uf ceramic and 22uF 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. 9/01 www.power-one.com
Page 6 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
+
FC100V10
Vin+
HWD15DGE
Vo1
LOAD1
-Vo1 VIN C1 C2 C3 C4
GND
VinVo2
LOAD2
-Vo2 C5 C6
CASE
Figure 3: Input filter configuration required to meet CISPR 22 Class A for Conducted Emissions. 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.
REV. 9/01 www.power-one.com
Page 7 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
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 of during a logic-high and on during a logic-low. 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
( Vo, adj - D) A - B ohm Vo, nom - Vo, adj
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:
AD - B ohm ( Vo, adj - D) - C
Raj, up
Where Radj-up is the resistance value and A, B, C, and D are defined in Table 7: Table 8 Output Adjustment Variables. Output Vo1 Vo2 A 4990 4990 B 2000 2000 C 2.5 0.8 D 2.5 2.5
REV. 9/01 www.power-one.com
Page 8 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output 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 3 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 3 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 C. Solution: Given: Vi = 24 V, Po = 60 W, TA = 60 C. Determine PD (Figure 4): PD = 13 W. Determine airflow (Figure 3): v = 200 ft/min
Natural 100 LFM 200 LFM 300 LFM 400 LFM
HWD15DGE - Power Derating
22 20 18 16 Power Dissipation (W) 14 12 10 8 6 4 2 0 0 10 20 30 40 50 Ambient Temperature (C) 60 70 80 90 100
Figure 3. Power Derating Curve REV. 9/01 www.power-one.com Page 9 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output Thermal Considerations (continued)
HWD15DGE Power Dissipation vs Output Power
Vinmin Vinnom1 Vinnom2 Vinmax
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 60 70 Output Power (W)
Figure 4. Power Dissipation vs Output Power
REV. 9/01 www.power-one.com
Page 10 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
HWD15DGE Power Dissipation vs Full Load Power Distribution
Vinmin Vinnom1 Vinnom2 Vinmax
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 Output Load, Io1/Io2 (A) 0.5/15
Figure 5. Power Dissipation vs Full Load Distribution
REV. 9/01 www.power-one.com
Page 11 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output Characteristic Curves
Tb = 40 C, nominal input voltage, and rated load unless otherwise specified.
HWD15DGE Efficiency vs Output Power
Vinmin Vinnom1 Vinnom2 Vinmax
90
85
80
Eff ici 75 en cy (% ) 70
65
60
55 0 10 20 30 40 50 60 70 Output Power (W)
Figure 6. Efficiency vs Output Power
REV. 9/01 www.power-one.com
Page 12 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
HWD15DGE Efficiency vs Full Load Power Distribution
Vinmin Vinnom1 Vinnom2 Vinmax
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) 0.5/15
Figure 7. Efficiency vs Full Load Power Distribution
REV. 9/01 www.power-one.com
Page 13 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output Characteristic Curves (con't)
Figure 8. Typical Turn-on Characteristics
REV. 9/01 www.power-one.com
Page 14 of 15
Datasheet HWD Series - 75 Watt, Half-Brick DC/DC Converter Wide Input Range Dual Output
Figure 9. Typical Turn-off Characteristics
REV. 9/01 www.power-one.com
Page 15 of 15

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