DATEL 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

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