CC109166798 - ABB - Datasheet.Live

Data Sheet

QBVW025A0B Barracuda* Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Features

 Compliant to RoHS II EU “Directive 2011/65/EU (-Z versions)

 Compliant to REACH Directive (EC) No 1907/2006

 High and flat efficiency profile – >95.5% at 12V

, 40% load to

100% output

 Wide Input voltage range: 36-75V

 Delivers up to 25A

output current

 Fully very tightly regulated output voltage

 Low output ripple and noise

 Industry standard, DOSA Compliant Quarter brick:

58.4 mm x 36.8 mm x 11.7 mm

(2.30 in x 1.45 in x 0.46 in)

 Constant switching frequency

 Positive Remote On/Off logic

 Output over current/voltage protection

 Over temperature protection

 Wide operating temperature range (-40°C to 85°C)

 ANSI/ UL

60950-1-2011 Recognized, CAN/CSA

†

C22.2

No.60950-1-07, Second Edition + A1:2011 (MOD) Certified IEC

60950-1:2005 (2nd edition) + A1:2009 and EN 60950-1:2006 +

A11:2009 + A1:2010 + A12:2011, and VDE‡ 0805-1 Licensed

 CE mark to 2006/96/EC directive

 Meets the voltage and current requirements for ETSI 300-

132-2 and complies with and licensed for Basic insulation

rating per EN60950-1

 2250 Vdc Isolation tested in compliance with IEEE 802.3

PoE

standards

 ISO** 9001 and ISO14001 certified manufacturing facilities

Applications

 Distributed power architectures

 Intermediate bus voltage applications

 Servers and storage applications

 Networking equipment including Power over Ethernet

(PoE)

 Fan assemblies and other systems requiring a tightly

regulated output voltage

Options

 Negative Remote On/Off logic (1=option code, factory

preferred)

 Auto-restart after fault shutdown (4=option code,

factory preferred)

 Remote Sense and Output Voltage Trim (9=option

code)

 Base plate option (-H=option code)

 Passive Droop Load Sharing (-P=option code)

Description

The QBVW025A0B Barracuda series of dc-dc converters are a new generation of fully regulated DC/DC power modules designed

to support 12Vdc intermediate bus applications where multiple low voltages are subsequently generated using point of load

(POL) converters, as well as other application requiring a tightly regulated output voltage. The QBVW025A0B series operate from

an input voltage range of 36 to 75Vdc and provide up to 25A output current at output voltages of 12V

in an industry standard,

DOSA compliant quarter brick. The converter incorporates digital control, synchronous rectification technology, a fully regulated

control topology, and innovative packaging techniques to achieve efficiency exceeding 96% at 12V output. This leads to lower

power dissipations such that for many applications a heat sink is not required. Standard features include on/off control, output

overcurrent and over voltage protection, over temperature protection, input under and over voltage lockout.

The output is fully isolated from the input, allowing versatile polarity configurations and grounding connections. Built-in filtering

for both input and output minimizes the need for external filtering.

* Trademark of General Electric Company

# UL is a registered trademark of Underwriters Laboratories, Inc.

† CSA is a registered trademark of Canadian Standards Association.

‡ VDE is a trademark of Verband Deutscher Elektrotechniker e.V.

§ This product is intended for integration into end-user equipment . All of the required procedures of end-use equipment should be followed.

¤ IEEE and 802 are registered trademarks of the Institute of Electrical and Electronics Engineers, Incorporated.

** ISO is a registered trademark of the International Organization of Standards.

RoHS Compliant

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings

only, functional operation of the device is not implied at these or any other conditions in excess of those given in the operations

sections of the Data Sheet. Exposure to absolute maximum ratings for extended periods can adversely affect device reliability.

Parameter Device Symbol Min Max Unit

Input Voltage*

Continuous VIN -0.3 75 Vdc

Operating transient ≤ 100mS 100 Vdc

Non- operating continuous VIN 80 100 Vdc

Operating Ambient Temperature All TA -40 85 °C

(See Thermal Considerations section)

Storage Temperature All Tstg -55 125 °C

I/O Isolation Voltage (100% factory Hi-Pot tested) All   2250 Vdc

* Input over voltage protection will shutdown the output voltage when the input voltage exceeds threshold level.

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.

Parameter Device Symbol Min Typ Max Unit

Operating Input Voltage VIN 36 48 75 Vdc

Maximum Input Current IIN,max - - 9 Adc

(VIN=0V to 75V, IO=IO, max)

Input No Load Current All IIN,No load

80 mA

(VIN = VIN, nom, IO = 0, module enabled)

Input Stand-by Current All IIN,stand-by

22 mA

(VIN = VIN, nom, module disabled)

External Input Capacitance All 100 - - μF

Inrush Transient All I2t - - 1 A2s

Input Terminal Ripple Current

(Measured at module input pin with maximum specified input

capacitance and ൏ 500uH inductance between voltage source

and input capacitance)

5Hz to 20MHz, VIN= 48V, IO= IOmax

All - 350 - mArms

Input Reflected Ripple Current, peak-to-peak

(5Hz to 20MHz, 12μH source impedance; VIN= 48V, IO= IOmax ; see

Figure 11)

All - 40 - mAp-p

Input Ripple Rejection (120Hz) All - 25 - dB

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This power module can be used in a wide variety of applications, ranging from simple standalone operation to an integrated part

of sophisticated power architecture. To preserve maximum flexibility, internal fusing is not included, however, to achieve maximum

safety and system protection, always use an input line fuse. The safety agencies require a fast-acting fuse with a maximum rating

of 30 A in the ungrounded input lead of the power supply (see Safety Considerations section). Based on the information provided in

this Data Sheet on inrush energy and maximum dc input current, the same type of fuse with a lower rating can be used. Refer to

the fuse manufacturer’s Data Sheet for further information.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Electrical Specifications (continued)

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions.

Parameter Device Symbol Min Typ Max Unit

Output Voltage Set-point (VIN=VIN,nom, IO=12.5A, TA =25°C) All VO, set 11.97 12.00 12.03 Vdc

Output Voltage

(Over all operating input voltage (40V to 75V), resistive load, and

temperature conditions until end of life)

All w/o -P VO 11.76  12.24 Vdc

-P Option VO 11.68  12.32 Vdc

Output Voltage (VIN=36V, TA = 25ºC) All VO 11.15   Vdc

Output Regulation[VIN, min = 40V]

Line (VIN= VIN, min to VIN, max) All w/o 9

option  0.2  % VO, set

Line (VIN= VIN, min to VIN, max) All w/ 9

option  0.5  % VO, set

Load (IO=IO, min to IO, max) All w/o P or

9 o

tion

 0.2  % VO, set

Load (IO=IO, min to IO, max) All w/ 9

tion

 1.2  % VO, set

Load (IO=IO, min to IO, max), Intentional Droop All w/ P

Option  0.40  Vdc

Temperature (TA = -40ºC to +85ºC) All   2 % VO, set

Output Ripple and Noise on nominal output

(VIN=VIN, nom and IO=IO, min to IO, max)

RMS (5Hz to 20MHz bandwidth) All  70  mVrms

Peak-to-Peak (5Hz to 20MHz bandwidth) All  200  mVpk-pk

External Output Capacitance

For CO >5000uF, IO must be < 50% IO, max during Trise. All CO, max 0  10,000 μF

Output Current All IO 0 25 Adc

Output Current Limit Inception All IO, lim  30  Adc

Efficiency (VIN=VIN, nom, TA=25°C)

IO=100% IO, max , VO= VO,set All η 96.0 %

IO=40% IO, max to 100% IO, max , VO= VO,set All η 95.5 %

Switching Frequency fsw 150 kHz

Dynamic Load Response

dIO/dt=1A/10s; Vin=Vin,nom; TA=25°C;

(Tested with a 1.0μF ceramic, a 10μF tantalum, and 470μF

capacitor and across the load.)

Load Change from IO = 50% to 75% of IO,max:

Peak Deviation

Settling Time (VO <10% peak deviation)

All Vpk



300

700



mVpk

s

Load Change from IO = 75% to 50% of IO,max:

Peak Deviation

Settling Time (VO <10% peak deviation)

Vpk

300

700

mVpk

s

General Specifications

Parameter Device Typ Unit

Calculated Reliability Based upon Telcordia SR-332 Issue 2:

Method I, Case 1, (IO=80%IO, max, TA=40°C, Airflow = 200 lfm), 90%

confidence

MTBF All 3,598,391 Hours

FIT All 277.9 109/Hours

Weight – Open Frame 47.4 (1.67) g (oz.)

Weight – with Base plate option 66.4 (2.34) g (oz.)

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Isolation Specifications

Parameter Symbol Min Typ Max Unit

Isolation Capacitance Ciso  1000  pF

Isolation Resistance Riso 10   MΩ

Feature Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature conditions. See

Feature Descriptions for additional information.

Parameter Device Symbol Min Typ Max Unit

Remote On/Off Signal Interface

(VIN=VIN, min to VIN, max , Signal referenced to VIN- terminal)

Negative Logic: device code suffix “1”

Logic Low = module On, Logic High = module Off

Positive Logic: No device code suffix required

Logic Low = module Off, Logic High = module On

Logic Low Specification

On/Off Thresholds:

Remote On/Off Current – Logic Low (Vin =100V) All Ion/off 280  310 μA

Logic Low Voltage All Von/off -0.3  0.8 Vdc

Logic High Voltage – (Typ = Open Collector) All Von/off 2.0  14.5 Vdc

Logic High maximum allowable leakage current

(Von/off = 2.0V) All Ion/off   10 μA

Maximum voltage allowed on On/Off pin All Von/off   14.5 Vdc

Turn-On Delay and Rise Times (IO=IO, max)

Tdelay=Time until VO = 10% of VO,set from either application

of Vin with Remote On/Off set to On (Enable with Vin); or

operation of Remote On/Off from Off to On with Vin

already applied for at least 150 milli-seconds (Enable

with on/off).

* Increased Tdelay due to startup for parallel modules.

All w/o P

option Tdelay, Enable

with Vin   150 ms

All w/o P

option Tdelay, Enable

with on/off   10 ms

All w/ P

option Tdelay, Enable

with Vin   180* ms

All w/ P

option Tdelay, Enable

with on/off   40* ms

Trise=Time for VO to rise from 10% to 90% of VO,set, For CO

>5000uF, IO must be < 50% IO, max during Trise.

* Increased Trise when pre-bias Vo exists at startup for

parallel modules.

All w/o P

option Trise   15 ms

All w/ P

option Trise   300* ms

Load Sharing Current Balance

(difference in output current across all modules with

outputs in parallel, no load to full load)

P Option Idiff

3 A

Remote Sense Range All w/ 9

option VSense   0.5 Vdc

Output Voltage Adjustment range All w/ 9

option VO, set 8.1 13.2 Vdc

Output Overvoltage Protection

All w/o 9

option VO,limit 14.5 17.0 Vdc

All w/ 9

option VO,limit V

O,set+2.5V VO,set+5.0V Vdc

Overtemperature Protection All Tref  140  °C

(See Feature Descri

tions)

Input Undervoltage Lockout

Turn-on Threshold (Default) 33 35 36 Vdc

Turn-off Threshold (Default) 31 33 34 Vdc

Input Overvoltage Lockout

Turn-off Threshold (Default)  86  Vdc

Turn-on Threshold (Default) 76 79  Vdc

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Characteristic Curves, 12Vdc Output

The following figures provide typical characteristics for the QBVW025A0B (12V, 25A) at 25ºC. The figures are identical for either

positive or negative Remote On/Off logic.

INPUT CURRENT, Ii (A)

EFFCIENCY, η (%)

INPUT VOLTAGE, VO (V) OUTPUT CURRENT, IO (A)

Figure 1. Typical Input Characteristic. Figure 2. Typical Converter Efficiency Vs. Output Current.

OUTPUT VOLTAGE,

VO (V) (50mV/div)

OUTPUT CURRENT OUTPUT VOLTAGE

IO (A) (5A/div) VO (V) (200mV/div)

TIME, t (2s/div) TIME, t (500 μs/div)

Figure 3. Typical Output Ripple and Noise, Io = Io,max.

Figure 4. Typical Transient Response to 0.1A/µs Step Change

in Load from 50% to 75% to 50% of Full Load, Co=470µF and

48 Vdc Input.

OUTPUT VOLTAGE INPUT VOLTAGE

VO (V) (5V/div) VIN(V) (20V/div)

OUTPUT VOLTAGE On/Off VOLTAGE

VO (V) (5V/div) VON/OFF (V)(2V/div)

TIME, t (20 ms/div) TIME, t (5 ms/div)

Figure 5. Typical Start-Up Using Vin with Remote On/Off

enabled, negative logic version shown.

Figure 6. Typical Start-Up Using Remote On/Off with Vin

applied, negative logic version shown.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Characteristic Curves, 12Vdc Output (continued)

OUTPUT VOLTAGE, VO (V)

INPUT VOLTAGE, Vin (V) OUTPUT CURRENT, IO (A)

Figure 7. Typical Output Voltage Regulation vs. Input

Voltage.

Figure 8. Typical Output Voltage Regulation vs. Output

Current .

OUTPUT VOLTAGE, VO (V)

OUTPUT CURRENT, IO (A)

Figure 9. Typical Output Voltage regulation vs. Input

Voltage for the –P Option.

Figure 10.

Typical Output Voltage Regulation vs. Output

Current for the –P Option.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Test Configurations

Note: Measure input reflected-ripple current with a simulated

source inductance (LTEST) of 12 µH. Capacitor CS offsets

possible battery impedance. Measure current as shown above.

Figure 11. Input Reflected Ripple Current Test Setup.

Note: Use a 1.0 µF ceramic capacitor and a 10 µF aluminum or

tantalum capacitor. Scope measurement should be made

using a BNC socket. Position the load between

51 mm and 76 mm (2 in. and 3 in.) from the module.

Figure 12. Output Ripple and Noise Test Setup.

Note: All measurements are taken at the module terminals. When

socketing, place Kelvin connections at module terminals to avoid

measurement errors due to socket contact resistance.

Figure 13. Output Voltage and Efficiency Test Setup.

Design Considerations

Input Source Impedance

The power module should be connected to a low

ac-impedance source. Highly inductive source impedance can

affect the stability of the power module. For the test

configuration in Figure 11, a 100μF electrolytic capacitor, Cin,

(ESR<0.7 at 100kHz), mounted close to the power module

helps ensure the stability of the unit.

Safety Considerations

For safety-agency approval of the system in which the power

module is used, the power module must be installed in

compliance with the spacing and separation requirements of

the end-use safety agency standard, i.e., UL60950-1 2nd Ed.,

CSA C22.2 No. 60950-1 2nd Ed., and VDE0805-1 EN60950-1 2nd

Ed.

If the input source is non-SELV (ELV or a hazardous voltage

greater than 60 Vdc and less than or equal to 75Vdc), for the

module’s output to be considered as meeting the requirements

for safety extra-low voltage (SELV), all of the following must be

true:

 The input source is to be provided with reinforced

insulation from any other hazardous voltages, including

the ac mains.

 One VIN pin and one VOUT pin are to be grounded, or both

the input and output pins are to be kept floating.

 The input pins of the module are not operator accessible.

 Another SELV reliability test is conducted on the whole

system (combination of supply source and subject

module), as required by the safety agencies, to verify that

under a single fault, hazardous voltages do not appear at

the module’s output.

Note: Do not ground either of the input pins of the module

without grounding one of the output pins. This may

allow a non-SELV voltage to appear between the output

pins and ground.

The power module has safety extra-low voltage (SELV) outputs

when all inputs are SELV.

The input to these units is to be provided with a maximum 30 A

fast-acting (or time-delay) fuse in the ungrounded input lead.

LOAD

CONT ACT AND

SUPPLY

CONTACT

(+)

(–)

DISTRIBUTION LO SSES

RESISTANCE

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Feature Descriptions

Overcurrent Protection

To provide protection in a fault output overload condition, the

module is equipped with internal current-limiting circuitry and

can endure current limiting continuously. If the overcurrent

condition causes the output voltage to fall greater than 4.0V

from Vo,set, the module will shut down and remain latched off.

The overcurrent latch is reset by either cycling the input power

or by toggling the on/off pin for one second. If the output

overload condition still exists when the module restarts, it will

shut down again. This operation will continue indefinitely until

the overcurrent condition is corrected.

A factory configured auto-restart option (with overcurrent and

overvoltage auto-restart managed as a group) is also available.

An auto-restart feature continually attempts to restore the

operation until fault condition is cleared.

Remote On/Off

The module contains a standard on/off control circuit reference

to the VIN(-) terminal. Two factory configured remote on/off

logic options are available. Positive logic remote on/off turns

the module on during a logic-high voltage on the ON/OFF pin,

and off during a logic low. Negative logic remote on/off turns

the module off during a logic high, and on during a logic low.

Negative logic, device code suffix "1," is the factory-preferred

configuration. The On/Off circuit is powered from an internal

bias supply, derived from the input voltage terminals. To turn

the power module on and off, the user must supply a switch to

control the voltage between the On/Off terminal and the VIN(-)

terminal (Von/off). The switch can be an open collector or

equivalent (see Figure 14). A logic low is Von/off = -0.3V to 0.8V.

The typical Ion/off during a logic low (Vin=48V, On/Off

Terminal=0.3V) is 147µA. The switch should maintain a logic-

low voltage while sinking 310µA. During a logic high, the

maximum Von/off generated by the power module is 8.2V. The

maximum allowable leakage current of the switch at Von/off =

2.0V is TBDµA. If using an external voltage source, the

maximum voltage Von/off on the pin is 14.5V with respect to the

VIN(-) terminal.

If not using the remote on/off feature, perform one of the

following to turn the unit on:

For negative logic, short ON/OFF pin to VIN(-).

For positive logic: leave ON/OFF pin open.

Figure 14. Remote On/Off Implementation.

Output Overvoltage Protection

The module contains circuitry to detect and respond to output

overvoltage conditions. If the overvoltage condition causes the

output voltage to rise above the limit in the Specifications

Table, the module will shut down and remain latched off. The

overvoltage latch is reset by either cycling the input power, or

by toggling the on/off pin for one second. If the output

overvoltage condition still exists when the module restarts, it

will shut down again. This operation will continue indefinitely

until the overvoltage condition is corrected.

A factory configured auto-restart option (with overcurrent and

overvoltage auto-restart managed as a group) is also available.

An auto-restart feature continually attempts to restore the

operation until fault condition is cleared.

Overtemperature Protection

These modules feature an overtemperature protection circuit

to safeguard against thermal damage. The circuit shuts down

the module when the maximum device reference temperature

is exceeded. The module will automatically restart once the

reference temperature cools by ~25°C.

Input Under/Over voltage Lockout

At input voltages above or below the input under/over voltage

lockout limits, module operation is disabled. The module will

begin to operate when the input voltage level changes to within

the under and overvoltage lockout limits.

Load Sharing

For higher power requirements, the QBVW025A0 power module

offers an optional feature for parallel operation (-P Option

code). This feature provides a precise forced output voltage

load regulation droop characteristic. The output set point and

droop slope are factory calibrated to insure optimum matching

of multiple modules’ load regulation characteristics. To

implement load sharing, the following requirements should be

followed:

 The VOUT(+) and VOUT(-) pins of all parallel modules must be

connected together. Balance the trace resistance for each

module’s path to the output power planes, to insure best

load sharing and operating temperature balance.

 VIN must remain between 40Vdc and 75Vdc for droop sharing

to be functional.

 These modules contain means to block reverse current flow

upon start-up, when output voltage is present from other

parallel modules, thus eliminating the requirement for

external output ORing devices. Modules with the –P option

will self determine the presence of voltage on the output

from other operating modules, and automatically increase

its Turn On delay, Tdelay, as specified in the Feature

Specifications Table.

 When parallel modules startup into a pre-biased output, e.g.

partially discharged output capacitance, the Trise is

automatically increased, as specified in the Feature

Specifications Table, to insure graceful startup.

 Insure that the load is <50% IO,MAX (for a single module) until

all parallel modules have started (load full start > module

Tdelay time max + Trise time).

 If fault tolerance is desired in parallel applications, output

ORing devices should be used to prevent a single module

failure from collapsing the load bus.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Feature Descriptions (continued)

Remote Sense (9 Option Code)

Remote sense minimizes the effects of distribution losses by

regulating the voltage at the remote-sense connections (See

Figure 15). The SENSE(-) pin should be always connected to VO(–

).The voltage between the remote-sense pins and the output

terminals must not exceed the output voltage sense range

given in the Feature Specifications table:

[VO(+) – VO(–)] – [SENSE(+) ]  0.5 V

Although the output voltage can be increased by both the

remote sense and by the trim, the maximum increase for the

output voltage is not the sum of both. The maximum increase is

the larger of either the remote sense or the trim.

The amount of power delivered by the module is defined as the

voltage at the output terminals multiplied by the output

current. When using remote sense and trim, the output voltage

of the module can be increased, which at the same output

current would increase the power output of the module. Care

should be taken to ensure that the maximum output power of

the module remains at or below the maximum rated power

(Maximum rated power = Vo,set x Io,max).

Figure 15. Circuit Configuration for remote sense.

Trim, Output Voltage Adjust (9 Option Code)

Trimming allows the output voltage set point to be increased or

decreased; this is accomplished by connecting an external

resistor between the TRIM pin and either the VO(+) pin or the

VO(-) pin.

(+)

TRIM

(-)

trim-down

LOAD

QBVW033A0 R

trim-up

Figure 16. Circuit Configuration to Trim Output Voltage.

Connecting an external resistor (Rtrim-down) between the TRIM pin

and the Vo(-) (or Sense(-)) pin decreases the output voltage set

point. To maintain set point accuracy, the trim resistor

tolerance should be ±1.0%.

The following equation determines the required external

resistor value to obtain a percentage output voltage change of

∆%



















22.10

511

downtrim

Where

100% ,

,















seto

desiredseto V

For example, to trim-down the output voltage of the 12V

nominal module by 20% to 9.6V, Rtrim-down is calculated as

follows:

20%



















22.10

511

downtrim



kR downtrim 3.15

Connecting an external resistor (Rtrim-up) between the TRIM pin

and the VO(+) (or Sense (+)) pin increases the output voltage set

point. The following equations determine the required external

resistor value to obtain a percentage output voltage change of

∆%:

























22.10

511

%225.1

%)100(11.5 ,seto

uptrim V

Where

100% ,

,















seto

setodesired

For example, to trim-up the output voltage of the 12V module

by 5% to 12.6V, Rtrim-up is calculated is as follows:

























22.10

511

5225.1 )5100(0.1211.5

uptrim





8.938

uptrim

The voltage between the Vo(+) and Vo(–) terminals must not

exceed the minimum output overvoltage protection value

shown in the Feature Specifications table. This limit includes

any increase in voltage due to remote-sense compensation

and output voltage set-point adjustment trim.

Although the output voltage can be increased by both the

remote sense and by the trim, the maximum increase for the

output voltage is not the sum of both. The maximum increase is

the larger of either the remote sense or the trim. The amount of

power delivered by the module is defined as the voltage at the

output terminals multiplied by the output current. When using

remote sense and trim, the output voltage of the module can

be increased, which at the same output current would increase

the power output of the module. Care should be taken to

ensure that the maximum output power of the module remains

at or below the maximum rated power (Maximum rated power

= VO,set x IO,max).

Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Feature Descriptions (continued)

Thermal Considerations

The thermal data presented here is based on physical

measurements taken in a wind tunnel, using automated

thermo-couple instrumentation to monitor key component

temperatures: FETs, diodes, control ICs, magnetic cores,

ceramic capacitors, opto-isolators, and module pwb

conductors, while controlling the ambient airflow rate and

temperature. For a given airflow and ambient temperature, the

module output power is increased, until one (or more) of the

components reaches its maximum derated operating

temperature, as defined in IPC-9592B. This procedure is then

repeated for a different airflow or ambient temperature until a

family of module output derating curves is obtained.

The power modules operate in a variety of thermal

environments and sufficient cooling should be provided to help

ensure reliable operation.

Thermal considerations include ambient temperature, airflow,

module power dissipation, and the need for increased

reliability. A reduction in the operating temperature of the

module will result in an increase in reliability.

Heat-dissipating components are mounted on the top side of

the module. Heat is removed by conduction, convection and

radiation to the surrounding environment. Proper cooling can

be verified by measuring the thermal reference

temperature

(TH

or TH

). Peak temperature occurs at the position indicated

in Figure 17 and 18. For reliable operation this temperature

should not exceed TH

=125°C or TH

=105°C. For extremely high

reliability you can limit this temperature to a lower value.

Figure 17. Location of the thermal reference temperature TH.

Figure 18. Location of the thermal reference temperature

for Base plate module.

The output power of the module should not exceed the rated

power for the module as listed in the Ordering Information

table.

Please refer to the Application Note “Thermal Characterization

Process For Open-Frame Board-Mounted Power Modules” for a

detailed discussion of thermal aspects including maximum

device temperatures.

Heat Transfer via Convection

Increased airflow over the module enhances the heat transfer

via convection. The thermal derating of figure 19- 23 shows

the maximum output current that can be delivered by each

module in the indicated orientation without exceeding the

maximum TH

temperature versus local ambient temperature

) for air flows of, Natural Convection, 1 m/s (200 ft./min), 2

m/s (400 ft./min).

The use of Figure 19 is shown in the following example:

Example

What is the minimum airflow necessary for a QBVW025A0B

operating at V

= 48 V, an output current of 20A, and a

maximum ambient temperature of 70 °C in transverse

orientation.

Solution:

Given: V

= 48V, I

= 20A, T

= 60 °C

Determine required airflow (V) (Use Figure 19:

V = 0.5m/s (100 LFM) or gre

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Thermal Considerations (continued)

OUTPUT CURRENT, IO (A)

LOCAL AMBIENT TEMPERATURE, TA (C)

Figure 19. Output Current Derating for the Open Frame

QBVW025A0B in the Transverse Orientation; Airflow

Direction from Vin(-) to Vin(+); Vin = 48V.

Figure 22. Output Current Derating for the Base plate

QBVW025A0B-H with 0.5” heatsink in the Transverse

Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V

OUTPUT CURRENT, IO (A)

LOCAL AMBIENT TEMPERATURE, TA (C)

Figure 20. Output Current Derating for the Base plate

QBVW025A0B-H in the Transverse Orientation; Airflow

Direction from Vin(-) to Vin(+); Vin = 48V.

Figure 23. Output Current Derating for the Base plate

QBVW025A0B-H with 1.0” heatsink in the Transverse

Orientation; Airflow Direction from Vin(-) to Vin(+); Vin = 48V.

OUTPUT CURRENT, IO (A)

LOCAL AMBIENT TEMPERATURE, TA

(C)

COLD WALL TEMPERATURE, TC (C)

Figure 21. Output Current Derating for the Base plate

QBVW025A0B-H with 0.25” heatsink in the Transverse

Orientation; Airflow Direction from Vin(-) to Vin(+); Vin =

48V

Figure 24. Output Current Derating for the Base Plate

QBVW025A0B-H in a Cold wall application; Local Internal Air

Temperature near module=80C, VIN = 48V, VOUT setting

anywhere from 6.0V to 12.0V.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Layout Considerations

The QBVW025 power module series are low profile in order

to be used in fine pitch system card architectures. As such,

component clearance between the bottom of the power

module and the mounting board is limited. Avoid placing

copper areas on the outer layer directly underneath the

power module. Also avoid placing via interconnects

underneath the power module.

For additional layout guide-lines, refer to FLTR100V10 Data

Sheet.

Through-Hole Lead-Free Soldering

Information

The RoHS-compliant, Z version, through-hole products use

the SAC (Sn/Ag/Cu) Pb-free solder and RoHS-compliant

components. The module is designed to be processed

through single or dual wave soldering machines. The pins

have a RoHS-compliant, pure tin finish that is compatible

with both Pb and Pb-free wave soldering processes. A

maximum preheat rate of 3C/s is suggested. The wave

preheat process should be such that the temperature of the

power module board is kept below 210C. For Pb solder, the

recommended pot temperature is 260C, while the Pb-free

solder pot is 270C max.

Reflow Lead-Free Soldering Information

The RoHS-compliant through-hole products can be

processed with following paste-through-hole Pb or Pb-free

reflow process.

Max. sustain temperature :

245C (J-STD-020C Table 4-2: Packaging Thickness>=2.5mm

/ Volume > 2000mm3),

Peak temperature over 245C is not suggested due to the

potential reliability risk of components under continuous

high-temperature.

Min. sustain duration above 217C : 90 seconds

Reflow Lead-Free Soldering Information

(continued)

Min. sustain duration above 180C : 150 seconds

Max. heat up rate: 3C/sec

Max. cool down rate: 4C/sec

In compliance with JEDEC J-STD-020C spec for 2 times

reflow requirement.

Pb-free Reflow Profile

BMP module will comply with J-STD-020 Rev. C

(Moisture/Reflow Sensitivity Classification for

Nonhermetic Solid State Surface Mount Devices) for both

Pb-free solder profiles and MSL classification

procedures. BMP will comply with JEDEC J-STD-020C

specification for 3 times reflow requirement. The suggested

Pb-free solder paste is Sn/Ag/Cu (SAC). The recommended

linear reflow profile using Sn/Ag/Cu solder is shown in Figure

25.

Time

Ramp up

max. 3°C/Sec

Ramp down

max. 4°C/Sec

Time Limited 90 Sec.

above 217°C

Preheat time

100-150 Sec.

Peak Temp. 240-245°C

25°C

150°C

200°C

217°C

Figure 25. Recommended linear reflow profile using

Sn/Ag/Cu solder.

MSL Rating

The QBVW025A0B modules have a MSL rating of 2a.

Storage and Handling

The recommended storage environment and handling

procedures for moisture-sensitive surface mount packages

is detailed in J-STD-033 Rev. A (Handling, Packing, Shipping

and Use of Moisture/Reflow Sensitive Surface Mount

Devices). Moisture barrier bags (MBB) with desiccant are

required for MSL ratings of 2 or greater. These sealed

packages should not be broken until time of use. Once the

original package is broken, the floor life of the product at

conditions of 30°C and 60% relative humidity varies

according to the MSL rating (see J-STD-033A). The shelf life

for dry packed SMT packages will be a minimum of 12

months from the bag seal date, when stored at the following

conditions: < 40° C, < 90% relative humidity.

Post Solder Cleaning and Drying

Considerations

Post solder cleaning is usually the final circuit-board

assembly process prior to electrical board testing. The result

of inadequate cleaning and drying can affect both the

reliability of a power module and the testability of the

finished circuit-board assembly. For guidance on

appropriate soldering, cleaning and drying procedures, refer

to GE Board Mounted Power Modules: Soldering and

Cleaning Application Note (AN04-001).

If additional information is needed, please consult with your

GE representative for more details.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

EMC Considerations

The circuit and plots in Figure 26 shows a suggested configuration to meet the conducted emission limits of EN55022 Class A. For

further information on designing for EMC compliance, please refer to the FLT012A0Z data sheet.

Figure 26. EMC Considerations

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Mechanical Outline for QBVW025A0B Through-hole Module

Dimensions are in millimeters and [inches].

Tolerances: x.x mm  0.5 mm [x.xx in.  0.02 in.] (Unless otherwise indicated)

x.xx mm  0.25 mm [x.xxx in  0.010 in.]

TOP VIEW*

SIDE VIEW

BOTTOM VIEW

Number

Name

1* VIN(+)

2* ON/OFF

3* VIN(-)

4* VOUT(-)

5† SENSE(-)

6† TRIM

7† SENSE(+)

8* VOUT(+)

† - Optional Pins

See Table 2

*Top side label includes GE name, product designation, and data code.

** Standard pin tail length. Optional pin tail lengths shown in Table 2, Device Options.

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Mechanical Outline for QBVW025A0B–H (Base plate) Through-hole Module

Dimensions are in millimeters and [inches].

Tolerances: x.x mm  0.5 mm [x.xx in.  0.02 in.] (Unless otherwise indicated)

x.xx mm  0.25 mm [x.xxx in  0.010 in.]

TOP VIEW

SIDE VIEW*

BOTTOM VIEW***

Number

Name

1* VIN(+)

2* ON/OFF

3* VIN(-)

4* VOUT(-)

5† SENSE(-)

6† TRIM

7† SENSE(+)

8* VOUT(+)

† - Optional Pins

See Table 2

*Side label includes product designation, and data code.

** Standard pin tail length. Optional pin tail lengths shown in Table 2, Device Options.

***Bottom label includes GE name, product designation, and data code

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Recommended Pad Layouts

Dimensions are in millimeters and (inches).

Tolerances: x.x mm  0.5 mm ( x.xx in.  0.02 in.) [unless otherwise indicated]

x.xx mm  0.25 mm ( x.xxx in  0.010 in.)

Through-Hole Modules

Number

Name

1* VIN(+)

2* ON/OFF

3* VIN(-)

4* VOUT(-)

5† SENSE(-)

6† TRIM

7† SENSE(+)

8* VOUT(+)

† - Optional Pins

See Table 2

Hole and Pad diameter recommendations:

Pin Number Hole Dia (mm) Pad Dia (mm)

1, 2, 3, 5, 6, 7 1.6 2.1

4, 8 2.2 3.2

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Packaging Details

All versions of the QBVW025A0B are supplied as standard in

the plastic trays shown in Figure 27.

Tray Specification

Material PET (1mm)

Max surface resistivity 109 -1011/PET

Color Clear

Capacity 12 power modules

Min order quantity 24 pcs (1 box of 2 full trays

+ 1 empty top tray)

Each tray contains a total of 12 power modules. The trays are

self-stacking and each shipping box for the QBVW025A0B

module contains 2 full trays plus one empty hold-down tray

giving a total number of 24 power modules.

Open Frame Module Tray Base Plate Module Tray

Figure 27. QBVW025 Packaging Tray

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

Ordering Information

Please contact your GE Sales Representative for pricing, availability and optional features.

Table 1. Device Codes

Product codes Input Voltage Output

Voltage

Output

Current Efficiency Connector

Type Comcodes

QBVW025A0BZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167796

QBVW025A0B1Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167383

QBVW025A0B41Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109166195

QBVW025A0B61Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167391

QBVW025A0B54Z 48V (3675Vdc) 12V 25A 96.0% Through hole 150024264

QBVW025A0B64Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109169875

QBVW025A0B641Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109166204

QBVW025A0B841Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109168407

QBVW025A0B941Z 48V (3675Vdc) 12V 25A 96.0% Through hole 150022025

QBVW025A0B964Z 48V (3675Vdc) 12V 25A 96.0% Through hole CC109173167

QBVW025A0B981Z 48V (3675Vdc) 12V 25A 96.0% Through hole 150028904

QBVW025A0B1-HZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167400

QBVW025A0B41-HZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109166798

QBVW025A0B51-HZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167417

QBVW025A0B61-HZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167821

QBVW025A0B641-HZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109166815

QBVW025A0B941-HZ 48V (3675Vdc) 12V 25A 96.0% Through hole 150020599

QBVW025A0B-PHZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109170065

QBVW025A0B1-PHZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167425

QBVW025A0B41-PHZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109167433

QBVW025A0B641-PHZ 48V (3675Vdc) 12V 25A 96.0% Through hole CC109173092

Table 2. Device Options

GE Data Sheet

QBVW025A0B Barracuda™ Series; DC-DC Converter Power Modules

36-75Vdc Input; 12.0Vdc, 25.0A, 300W Output

For more information, call us at

USA/Canada:

+1 888 546 3243, or +1 972 244 9288

Asia-Pacific:

+86.021.54279977*808

Europe, Middle-East and Africa:

+49.89.878067-280

India:

+91.80.28411633

www.ge.com/powerelectronics