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TECHNICAL DATASHEET
In Development
HVIB SERIES
175-405 VDC Input Voltage Range
12, 24, 28, & 48 VDC Single Outputs
500W DC/DC Power Converters
APPLICATIONS
 Telecommunications Equipment
 Network (LANs/WANs) Equipment
 Industrial Equipment
 Test Equipment
FEATURES
 High Power Density
 3000Vrms I/O Isolation
 High Input Voltage Capability
 Very Low Output Ripple
 Wide Input Range
 Fixed Switching Frequency
 Fast Transient Response
 Remote On/Off (Active High/Low)
 Remote Sense
 Short Circuit & Over Temperature Protection
 Enable/Disable Pin
 100% Burn-in
 ±10% Trim Capability
 High Efficiency
DESCRIPTION
The HVIB Series consists of 500 watt dc/dc converters with a single output and a 175~405VDC input voltage
range. The HVIB series is being introduced to answer the needs of higher power systems requiring off-line
voltages at higher power levels up to 500 watts. The HVIB is particularly suited for use in telecommunications
equipment, network (LANs/WANs) equipment, and industrial and test equipment. As specialists in modified
standard and customized power solutions, Wall Industries is also capable of rapidly customizing the HVIB series
to meet specific customer needs.
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 1 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
TECHNICAL SPECIFICATIONS: HVIB 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
Related Condition
INPUT (Vin)
Operating Voltage Range
Min
Nom
Max
Unit
405
V
175
UVLO Turn On at
190
200
210
V
UVLO Turn Off at
160
165
170
V
-
UVLO Hysterisis
Maximum Input Current
300Vin @ 500W Output
No Load Input Current
Input Current under “Disable”
Input Surge Voltage
100mS Wavefront
-
20
-
108
-
TBD
-
V
A
-
A
TBD
-
mA
-
450
V
92%
EFFICIENCY
OUTPUT (Vo)
Voltage Set Point
Sense pins connected to respective outputs
99%
100
101
%Vo
Voltage Adjustment
Output limited to 500W
90%
-
110%
%Vo
Load Regulation
Sense pins connected to respective outputs
-
0.05
0.4
%Vo
Line Regulation
Sense pins connected to respective outputs
-
0.05
0.4
%Vo
Temperature Drift
Through operating temperature range
-
0.005
0.04
%/°C
-
-
5
%Vo
105
-
120
%FL
-
TBD
-
Remote Sense Compensation
Ripple
Spikes
Current
Current Limit
Threshold
Maximum Admissible Output Capacitance
Full load, resistive
DYNAMIC RESPONSE
Load step /  V
Recovery Time
50% to 100% load step change
-
5
-
%Vo
Recovery to within 1% Vo
-
1
-
mS
TBD
A
μF
Turn On Delay
From enable, 1S after application of Vin
-
20
-
mS
Turn On Overshoot
Full load; resistive
0
-
-
%Vo
Hold Up Time
0
mS
DISABLE SIGNAL (Logic enable)
Off Condition
Pulled low = off, TTL compatible (ref. to –Vin)
0
-
0.8
V
On Condition
Open = on (internally pulled up), TTL
-
3.3
-
V
ISOLATION
Input-Output
1 minute
3000
-
-
Vrms
Isolation Resistance
100
-
-
MΩ
Isolation Capacitance
1000
pF
THERMAL
Case (Graph 2)
-40
Over Temperature Protection
-
Storage Temperature
MTBF
-55
Bellcore TR-332 Issue 6 - Calculated
100
°C
-
°C
125
°C
TBD hours
See Figure 1
MECHANICAL
TBD
Weight
12/27/2011
105
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 2 of 11
TECHNICAL DATASHEET
In Development
HVIB Series
MODEL SELECTION TABLE
Model No.
Input Voltage Range
HVIB300S12-500
Output Voltage
Output Current
Output Power
12 VDC
41.67 A
500W
HVIB300S24-500
300 VDC
24 VDC
20.83 A
500W
HVIB300S28-500
175 ~ 405 VDC
28 VDC
17.86 A
500W
48 VDC
10.42 A
500W
HVIB300S48-500
Figure 1: Mechanical Dimensions
Unit: inches [mm]
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 3 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
DESIGN CONSIDERATIONS
Under Voltage Lock Out (UVLO)
The converter output is disabled until the input voltage exceeds the UVLO turn-on limit. The converter will
remain ON until the input voltage falls below the UVLO turn-off limit. There is approximately 20V hysteresis in
the UVLO circuit.
Over Current Protection
The converter is internally protected from short circuit and over current conditions. During these fault conditions,
the converter output will “hiccup”- (short) or “fold back” - (over current). The converter output will recover once
the short or over current fault is removed.
Over Temperature Protection
The converter is protected from over temperature conditions. Upon exceeding this temperature, the converter will
shut down. The converter will automatically recover once it has sufficiently cooled.
Input Filter
A 47μF low ESR capacitor across the input pins is recommended for most system level designs. No additional
input capacitance is needed for the power supply to operate with low impedance inputs. However, most “real
world” system level integration will have some amount of trace or wiring lengths – raising the inductive
impedance. The added input capacitor will bring the impedance back towards unity.
Output Filter
No additional output capacitor is needed for the power supply to operate within stated specifications. However, if
it is a requirement to reduce the ripple and noise on the output, additional capacitance may be added. Usually,
ceramic MLCC’s capacitor works best for reducing H.F. spike noise. Also, capacitance in the form of a tantalum
or aluminum electrolytic capacitor may also be placed across the output in order reduce base ripple, and improve
the load transient peak-to-peak voltage deviation.
Remote Sense
To improve the voltage regulation at the load, route the connections from the -Sense and the +Sense pins to the
–Vout and +Vout connections AT the load. This will force the converter to regulate the voltage at the load and not
at the pins of the converter. If it is not desired to use the Remotes Sense feature, the –Sense and +Sense pins
should be connected to the -Vout and +Vout pins respectively.
Fusing
It is required that the input to the converter be supplied with a maximum 10A appropriately rated fuse for the
application
Safety
The HVIB series is CE pending and pending approval of the following: UL1950, CUL950, TUV60950 FILE
155800. The isolation provided by the HVIB Series is a reinforced insulation in accordance with EN60950.
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 4 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
Remote ON/OFF
The HVIB series has Remote ON/OFF (Enable/Disable) capability using TTL logic levels. This function is offered as either
Active=TTL High (no suffix) or Active=TTL Low (R suffix), see order details on page 14. For Remote ON/OFF limits, see
page 2.
Figure 2. Remote (L/E)
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 5 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
Output Voltage Trim
The following information is provided to allow quick calculation of the trim resistor value for a desired output
voltage. The general procedure for calculating a trim resistor is as follows:
1. Determine the desired output voltage deviation %.
2. To trim down, solve for resistor value using the “Rtlow” equation.
3. To trim up, solve for resistor value using the “Rthi” equation.
4. Solved resistor values are in K ohms.
Figure 3
 510

 10.2 
Rtlow  
 %

Figure 4

 5.1  Vo (100  %) 510
Rthi  

 10.2
%

 1.2225  %
Notes:
1.
2.
3.
4.
Maximum trim range is ±10%. This includes remote sense drops if applicable.
Output current is limited to specified current when trimming down.
Output power is limited to specified power when trimming up.
Trim resistors should be placed close to the module.
5. If the trim function is not used, it is advised to leave the trim pin floating / not connected.
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 6 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
Graph 1: HVIB300SXX-500 Efficiency vs. Output Current
TBD
Graph 2: Projected HVIB300SXX-500 Max Case vs. Output Power
TBD
Graph 3: HVIB300SXX-500 Power Dissipation vs. Input Voltage
TBD
Graph 4: HVIB300SXX-500 Input Current vs. Input Voltage
TBD
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 7 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
TEST SETUP:
The HVIB series specifications are tested with the following configurations:
Regulation and Efficiency Setup
To ensure that accurate measurements are taken, the voltage measurements are taken directly at the terminals of
the module. This minimizes errors due to contact and trace lengths between the load and the output of the supply.
The following diagram is of the test setup.
Figure 5: Regulation and Efficiency Probe Setup
Output Ripple Voltage Setup
The module is tested with a 0.1μF ceramic capacitor in parallel with a 10μF tantalum capacitor across the output
terminals. Unless otherwise specified, bandwidth is limited to 20MHZ.
Figure 6: Ripple Voltage Probe Setup
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 8 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
Input Reflected Ripple Current and Input Ripple Voltage Setup
The module is tested for input reflected ripple current (Irrc). The input ripple voltage is also measured at the pins
with and without an additional 4,700μF electrolytic capacitor. To reduce either the input ripple current or voltage
additional capacitors and/or an inductor may be added to the input of the converter.
Figure 7: Ripple Current Setup (need new with 47uF capacitor, 200uH inductor)
Converter Thermal Consideration
The converter is designed to operate without convective cooling if the de-rating curves are followed. The
converter can operate at higher temperatures and higher output currents if airflow and/or a heatsink are applied.
See Graph 2 for de-rating curves or contact factory for additional thermal information.
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 9 of 11
In Development
TECHNICAL DATASHEET
HVIB Series
Paralleling Converters
The HVIB series converters may be paralleled both for redundancy and for higher output current. However, in
order to do this, a high-current, low Vf, Schottky diode must be placed at the +Vo pin of each supply as shown in
Figure 8. To improve sharing, tie the two TRIM pins together. The converters may be trimmed by adding a
resistor value from each TRIM pin to ±RS pin, or alternatively, a single resistor of half the value from the common
TRIM pins to the common ±RS pins.
Figure 8: Paralleling Converters
12/27/2011
Wall Industries, Inc. 5 Watson Brook Road Exeter, NH 03833
603-778-2300 www.wallindustries.com Fax 603-778-9797
Page 10 of 11
TECHNICAL DATASHEET
In Development
HVIB Series
Ordering Information:
Part Number Example:
HVIB 300 S 24 – 500 R TH
Series
Designation
Nominal
Input
Voltage
Single
Output
Nominal
Output
Voltage
Maximum
Output
Power
Options
Blank
R
Options
Blank
TH
Threaded Hole
Through Hole
Active High Enable
Active Low Enable
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:
12/27/2011
(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 11 of 11