Datasheet BWR-5-3-3.3-4.25-D48AN, BWR-5-3-3.3-4.25-D48AS, BWR-5-3-3.3-4.25-D24AS, BWR-5-3-3.3-4.25-D24AN, BWR-5-3-3.3-4.25-D12AS Datasheet (DATEL)

5V and 3.3V, Independent Dual Output

30 Watt, DC/DC Converters

Dual Output

Mixed Voltage, BWR Models

Features

Figure 1. Simplifi ed Schematic

INNOVATION and EX C ELL E N C

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DATEL, Inc., Mansfi eld, MA 02048 (USA) · Tel: [phone] Fax: [phone] · Email: [e-mail] · Internet: www.datel.com

DATEL's BWR series of DC/DC converters now includes two independent con-

verters in one 2" x 2" package. The BWR-5/3-3.3/4.25 family provides both 5V at 3
Amps and 3.3V at 4.25 Amps for a combined output power of 30 Watts from input
ranges of 10V to 18V (-D12A), 18 to 36V (-D24A), or 36 to 75V (-D48A).

Each output is regulated by its own control loop to provide ±1% load and ±0.5%
line regulation. Individual trim pins and a negative or positive on/off control pin
allow independent adjustment of output voltages and any combination of power-on
sequencing between the 5V and 3.3V outputs. A high effi ciency of 88% allows full
load operation up to +65°C ambient temperature in a still air environment. Although
functionally independent, both outputs are driven from synchronized PWMs to
prevent asynchronously generated beat frequencies.

Housed in a plastic case, all models include input Pi fi ltering, input overvoltage
protection, independent output short circuit and current limiting protection and
independent output overvoltage protection as well as thermal shutdown. A Sync
option is available in place of 3.3V on/off control. These devices meet IEC950,
UL1950 and EN6950 safety standards. CB reports are available upon request.
"D48A" models are CE marked (meet LVD requirements).

Independently regulated 5V/ 3.3V outputs

5V @ 3A/3.3V @ 4.25A simultaneously
delivered

Independent V

OUT Trim pins for margining

Independent On/Off Control pins

88% effi ciency; 75mV ripple/noise

Input ranges: 10-18V, 18-36V or 36-75V

UL 1950 and EN60950 safety approvals

Fully isolated, 1500Vdc guaranteed

Input under and overvoltage shutdown

Independent OVP; short circuit protection

Thermal shutdown

–INPUT

PWM

CONTROLLER

OPTO

ISOLATION

REFERENCE &

ERROR AMP

SWITCH

CONTROL

+3.3V OUTPUT

SWITCH

CONTROL

OUTPUT
RETURN

+5V OUTPUT

+INPUT

5V ON/OFF

CONTROL

3.3V ON/OFF
CONTROL

INPUT UNDERVOLTAGE

AND OVERVOLTAGE

COMPARATORS

PWM

CONTROLLER

OPTO

ISOLATION

REFERENCE &

ERROR AMP

30W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

XWR Series

1
2
3

4

8

9

10

5

6
7

2.00

(50.80)

1.800

(45.72)

0.10

(2.54)

BOTTOM VIEW

0.20

(5.08)

0.200
(5.08)

0.300
(7.62)

0.600

(15.24)

1.000

(25.40)

1.600

(40.64)

1.200

(30.48)

0.600

(15.24)

3 EQ. SP. @

0.200 (5.08)

PLASTIC CASE

0.040 ±0.001 DIA.
(1.016 ±0.025)

0.20 MIN
(5.08)

2.00

(50.08)

0.48

(12.19)

STANDOFF

0.020 (0.51)

Performance Specifi cations and Ordering Guide

➀

PART NUMBER STRUCTURE

V1 Nominal Output Voltage:
5 Volts

5

BWR

3-

/

D48A

-

Input Voltage Range:
D12A = 10-18 Volts (12V nominal)
D24A = 18-36 Volts (24V nominal)
D48A = 36-75 Volts (48V nominal)

I

1 Maximum Output Current:

3 Amps

Dual Output/
Mixed-Voltage Series

3.3 4.25

/

-

N

V2 Nominal Output Voltage:

3.3 Volts

I2 Maximum Output Current:

4.25 Amps

Add "N" or "S" suffi x as desired

Part Number Suffi xes

BWR 30 Watt DC/DC's are designed so a negative logic

on/off control ("N" suffi x) can be added in the pins 3 and

4 position, or a Sync function ("S" suffi x) can be

added in the pin 3 position.

No Suffi x On/Off Control function (positive polarity)

N Negative polarity on/off control

S Sync function

BWR-5/3-3.3/4.25-D12A

5 3 75 100 ±0.5% ±1%

12 10-18 210/2846 83% 85% C20, P42

3.3 4.25 75 100 ±0.5% ±1%

BWR-5/3-3.3/4.25-D24A

5 3 75 100 ±0.5% ±1%

24 18-36 115/1374 85.5% 88% C20, P42

3.3 4.25 75 100 ±0.5% ±1%

BWR-5/3-3.3/4.25-D48A

5 3 75 100 ±0.5% ±1%

48 36-75 70/687 85.5% 88% C20, P42

3.3 4.25 75 100 ±0.5% ±1%

➀ Typical at TA = +25°C under nominal line voltage and "full-load" conditions.
➁ Any combination of 5V/3.3V current, not to exceed the published I

OUT specifi cation (30 Watts).

➂ Ripple/Noise (R/N) measured over a 20MHz bandwidth with 0.47µF ceramic output capacitors.
➃ Tested from 10% load to 100% load.
➄ Nominal line voltage, no load/full load condition.

Output

Input

R/N (mVp-p) ➂ Regulation (Max.) Effi ciency

Packag e

V

OUT IOUT ➁ VIN Nom. Range IIN ➄ (Case,

Model (Volts) (Amps) Typ. Max. Line Load ➃ (Volts) (Volts) (mA) Min. Typ. Pinout)

MEC ANICAL SPECIFI CATIONS

2

I/O Connections

Pin Function P42

1 +Input

2 –Input

3 +5V On/Off

4 +3.3V On/Off

5 +5V Output

6 +5V Return

7 +5V Trim

8 +3.3V Return

9 +3.3V Output

10 +3.3V Trim

Case C20

BWR Models

30W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

Performance/Functional Specifi cations

Typical @ TA = +25°C under nominal line voltage, balanced "full-load" conditions, unless noted. ➀

Input

Input Voltage Range:

D12A Models 10-18 Volts (12V nominal)

D24A Models 18-36 Volts (24V nominal)

D48A Models 36-75 Volts (48V nominal)

Overvoltage Shutdown:

D12A Models 18.5-21 Volts (20V nominal)

D24A Models 37-40 Volts (38V typical)

D48A Models 77-81 Volts (79V typical)

Start-Up Threshold:

D12A Models 9.4-10 Volts (9.6V typical)

D24A Models 16.5-18 Volts (17V typical)

D48A Models 34-36 Volts (35V typical)

Undervoltage Shutdown:

D12A Models 7-8.5 Volts (8V typical)

D24A Models 16-17.5 Volts (16.5V typical)

D48A Models 32.5-34.5 Volts (33.5V typical)

Input Current:

Normal Operating Conditions See Ordering Guide

Standby Mode:

Off, OV, UV, Thermal Shutdown 10mA typical

Input Refl ected Ripple Current:

Source Impedance <0.1Ω, no external input fi ltering

D12A Models TBD

D24A/D48A Models TBD

Internal Input Filter Type Pi (0.022µF - 4.7µH - 2.46µF)

Reverse-Polarity Protection:

D12A Models 1 minute duration, 6A maximum

D24A Models 1 minute duration, 4A maximum

D48A Models 1 minute duration, 2A maximum

On/Off Control (Pins 3 & 4):

➂ ➃ ➅

D12A, D24A & D48A Models On = open or 13V to +V

IN,

I

IN = 1.6mA @ 13V

Off = 0-0.8V, I

IN = 2mA @ 0V

"N" Suffi x Models

➈ On = 0-1.2V, IIN = 2mA @ 0V

Off = open

Sync (Option, Pin 4):

➂ ➃ ➅

Input Threshold (Rising Edge Active) 1-2.7 Volts

Input Voltage Low 0-0.9 Volts

Input Voltage High 2.8-5 Volts

Input Resistance 35kΩ minimum

Output High Voltage (100µA load) 3.5-4.8 Volts

Output Drive Current 35mA

Input/Output Pulse Width 160-360nsec

Output

VOUT Accuracy

5V Output ±1.5% maximum

3.3V Output ±1.5% maximum

Minimum Loading Per Specifi cation 10% of I

OUT maximum

Minimum Loading For Stability ➇ No load

Ripple/Noise (20MHz BW)

➄ See Ordering Guide

Line/Load Regulation See Ordering Guide

Effi ciency See Ordering Guide

Trim Range

➁ ±5%

Isolation Voltage:

Input-to-Output 1500Vdc minimum

Output (continued)

Isolation Resistance 100MΩ

Isolation Capacitance 470pF

Current Limit Inception:

5V @ 98.5% V

OUT 3.8-5.1 Amps

3.3V @ 98.5% V

OUT 5.4-6.8 Amps

Short Circuit Current:

5V Output 3.0 Amps average current

3.3V Output 3.0 Amps average current

Overvoltage Protection: Magnetic feedback, transorb

5V Output 6.0 Volts

3.3V Output 4.1 Volts

Maximum Capacitive Loading

D12A Models 3.3V 1000µF

5V 680µF

D24A, D48A Models 3.3V 1000µF

5V 680µF

Temperature Coeffi cient ±0.02% per °C

Dynamic Characteristics

Dynamic Load Response:

5V (50-100% load step to 1% V

OUT) 200µsec maximum

3.3V (50-100% load step to 1% V

OUT) 200µsec maximum

Start-Up Time: ➁

V

IN to VOUT 10ms

On/Off to V

OUT TBD

Switching Frequency 355kHz (±35kHz)

Environmental

MTBF ➆ Bellcore, ground fi xed, full power

25°C ambient

D12A Models 873.9 thousand hours

D24A Models 1.32 million hours

D48A Models 1.23 million hours

Operating Temperature (Ambient):

➁

Without Derating:

D12A Models –40 to +60°C

D24A & D48A Models –40 to +65°C

With Derating To +100°C (See Derating Curves)

Case Temperature:

Maximum Operational +100°C

For Thermal Shutdown +100°C minimum, +110°C maximum

Storage Temperature –40 to +120°C

Physical

Dimensions 2" x 2" x 0.5" (50.8 x 50.8 x 12.7mm)

Case Material Diallyl phthalate, UL94V-0 rated

Pin Material Brass, solder coated

Weight: 2.7 ounces (76.5 grams)

Primary to Secondary Insulation Level Operational

➀ All models are specifi ed with external 0.47µF ceramic output capacitors.
➁ See Technical Notes/Graphs for details.
➂ The On/Off Control function can be replaced with a Sync function. See Part Number

Suffi xes and Technical Notes for details.

➃ Applying a voltage to On/Off Control (pins 3 & 4) when no input power is applied to the

converter can cause permanent damage.

➄ Output noise may be further reduced with the installation of additional external output

capacitors. See Technical Notes.

➅ On/Off control is designed to be driven with open collector or by appropriate voltage

levels. Voltages must be referenced to the –Input (pin 2).

➆ Demonstrated MTBF available on request.
➇ For conditions with less than minimum loading, outputs remain stable. However, regulation

performance will degrade.

➈ Maximum applied voltage to On/Off pin (N suffi x) less than 19.0V.

3

30W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

XWR Series

Output Power (watts)

Ambient Temperature (°C)

35

30

25

20

15

10

5

0

–40 –100102030405060708090100

Output Power vs. Ambient Temperature

(V

IN nominal, natural convection air flow.)

D12A MODELS

D24A, D48A
MODELS

Typical Performance Curves

Absolute Maximum Ratings

Input Voltage:

Continuous: D12A Models 23 Volts
D24A Models 42 Volts
D48A Models 81 Volts
Transient (100msec): D12A Models 25 Volts
D24A Models 50 Volts
D48A Models 100 Volts

Input Reverse-Polarity Protection Input Current must be limited. 1 minute
duration. Fusing recommended.
D12A Models 6 Amps
D24A Models 4 Amps
D48A Models 2 Amps

Output Current

➁ Current limited. Devices can withstand

an indefi nite output short circuit.

On/Off Control (Pins 3 & 4) Max. Voltages

Referenced to –Input (pin 2)

D12A, D24A & D48A Models +VIN

"N" Models ±19V

Storage Temperature –40 to +120°C

Lead Temperature (Soldering, 10 sec.) +300°C

These are stress ratings. Exposure of devices to any of these conditions may adversely

affect long-term reliability. Proper operation under conditions other than those listed in the

Performance/Functional Specifi cations Table is not implied, nor recommended.

TECHNICAL NOTES

Trimming Output Voltages

These BWR converters have a trim capability (pins 3 & 4) that allow users

to independently adjust the output voltages ±5%. Adjustments to the output

voltages can be accomplished via a trim pot, Figure 2, or a single fi xed

resistor as shown in Figures 3 and 4. A single fi xed resistor can increase

or decrease the output voltage depending on its connection. Fixed resistors

should have absolute TCR's less than 100ppm/°C to minimize sensitivity to

changes in temperature.

A single resistor connected from the 5V Trim pin (pin 7) to the +5V Output

(pin 5), see Figure 3, will decrease the +5V output voltage. A resistor con-

nected from the +5V Trim (pin 7) to the +5V Return (pin 6) will increase the

+5V output voltage. See Figure 4.

Similarly, the 3.3V output can be adjusted using a single resistor connected

from the +3.3V Trim (pin 10) to the +3.3V Output (pin 9) or to the +3.3V

Return (pin 8). See Figures 3 and 4.

+5V

LOAD

+5V OUTPUT

–INPUT

+5V
ON/OFF
CONTROL

+3.3V
ON/OFF
CONTROL

+INPUT

+5V TRIM

+5V RETURN

+3.3V OUTPUT

+3.3V TRIM

+3.3V RETURN

10

8

1

4

9

7

5

6

20kΩ

5-22

TURNS

3

2

+3.3V
LOAD

20kΩ

5-22

TURNS

+5V LOAD

5V R

TRIM DOWN

+5V OUTPUT

–INPUT

+5V
ON/OFF
CONTROL

+3.3V
ON/OFF
CONTROL

+INPUT

+5V TRIM

+5V RETURN

+3.3V TRIM

+3.3V OUTPUT

+3.3V RETURN

9

8

1

4

10

7

5

6

3

2

+3.3V LOAD

3.3V R

TRIM DOWN

+5V LOAD

5V R

TRIM UP

+5V OUTPUT

–INPUT

+5V
ON/OFF
CONTROL

+3.3V
ON/OFF
CONTROL

+INPUT

+5V TRIM

+5V RETURN

+3.3V TRIM

+3.3V OUTPUT

+3.3V RETURN

9

8

1

4

10

7

5

6

3

2

+3.3V LOAD

3.3V R

TRIM UP

4

Note: Resistor values are in kΩ. Accuracy of adjustment is subject to

tolerances of resistors and factory-adjusted output accuracy.

V

O = desired output voltage.

UP

VO – 5

5V R

T (kΩ) =

–15

6.27

UP

VO – 3.3

3.3V R

T (kΩ) =

–14.3

3.16

DOWN

5 – VO

5V RT (kΩ) =

–15

2.49(VO – 2.52)

DOWN

3.3 – VO

3.3V RT (kΩ) =

–14.3

2.49(VO – 1.27)

Figure 2. Trim Connections Using A Trim Pot

Figure 3. Trim Connections To Decrease Output Voltages Using Fixed Resistors

Figure 4. Trim Connections To Increase Output Voltages Using Fixed Resistors

Typical Performance Curves

BWR Models

30W, DUAL OUTPUT, MIXED-VOLTAGE DC/DC CONVERTERS

Typical Start-Up from VIN

(VIN = nominal, 5V @ 3A/3.3V @ 4.25A, 0.47µF output capacitors.)

5VOUT

VIN

3.3VOUT

2.5msec/div

87

85

83

81

79

77

75

D12A Models: Efficiency vs. Line and Load

10 11.14 12.29 13.43 14.57 15.71 16.86 18

Line Volta ge (Volts)

Efficiency (%)

5V@0A, 3.3V@4.25A

5V@3A, 3.3V@0A

5V@3A, 3.3V@4.25A

89

88

87

86

85

84

83

82

81

80

79

D24A Models: Efficiency vs. Line and Load

18 24 30 36

Line Volta ge (Volts)

Efficiency (%)

5V@3A, 3.3V@2.325A

5V@1.65A, 3.3V@4.25A

5V@3A, 3.3V@0.4A

5V@0.3A, 3.3V@4.25A

89

87

85

83

81

79

77

D48A Models: Efficiency vs. Line and Load

36 48 60 75

Line Volta ge (Volts)

Efficiency (%)

5V@3A, 3.3V@2.325A

5V@1.65A, 3.3V@4.25A

5V@3A, 3.3V@0.4A

5V@0.3A, 3.3V@4.25A

DA TEL mak es no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do
not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifi cations are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

DATEL (UK) LTD. Tadley, England Tel: [phone]

DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: [phone]
DATEL GmbH München, Germany Tel: [phone]
DATEL KK Tokyo, Japan Tel: [phone], Osaka Tel: [phone]

DATEL, Inc. 11 Cabot Boulevard, Mansfi eld, MA 02048-1151
Tel: [phone] [phone] Fax: [phone]
Internet: www.datel.com Email: [e-mail]

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