5V and 3.3V, "Half-Brick"

75 Watt, DC/DC Converters

Dual Output

Mixed Voltage, BCP Models

Features

As your new, mixed-logic (5V and 3.3V) design evolves and your current require-

ments change, your new DC/DC converter will not. DATEL’s BCP-5/15-3.3/15-D24

(18-36V input) and BCP-5/15-3.3/15-D48 (36-75V input) are fully isolated DC/DC

converters providing both 5V and 3.3V outputs. Housed in standard "half-brick"

packages (2.3" x 2.4" x 0.525"), the BCP’s can support any combination of 5V and

3.3V loading up to a combined total of 15 Amps. Both outputs are fully isolated

(1500Vdc) and independently line (±0.2%) and load (±0.5% and ±0.6%) regulated.

Both BCP models feature input pi filters, input undervoltage and overvoltage shut-

down, input reverse-polarity protection, output overvoltage protection, current limiting,

and thermal shutdown. Each has an on/off control function, and the two output volt-

ages can be trimmed independently.

BCP Model DC/DC’s deliver low noise (50mVp-p), high efficiency (87%) and are

fully specified for –40 to +100°C operation. Utilization of metal baseplate technology

with threaded inserts permits easy heat-sink attachment and/or pcb mounting. These

devices meet IEC950, UL1950, EN60950 and VDE safety standards, including

BASIC insulation requirements. CB reports are available on request. "D48" models

are CE marked (meet the requirements of LVD).

Figure 1. Simplified Schematic

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Independent 5V and 3.3V outputs

Each output fully regulated

No minimum load requirements

Up to 15 Amps per output

75 Watts total output power

Standard "half-brick" package

UL1950, EN60950 and VDE safety

approvals (BASIC insulation)

Fully isolated, 1500Vdc guaranteed

18-36V or 36-75V input ranges

mark available (75V-input models)

Input under and overvoltage shutdown

Continuous short-circuit protection

Thermal shutdown

+INPUT

(4)

–INPUT

(1)

SWITCH

CONTROL

+5V OUTPUT

(7)

+3.3V OUTPUT

(10)

5V RETURN (6)

3.3V RETURN

(9)

3.3V TRIM

(8)

5V TRIM

(5)

MAG AMP

CONTROLLER

PWM

CONTROLLER

REFERENCE &

ERROR AMP

OPTO

ISOLATION

ON/OFF

CONTROL

(3)

UV & OV

COMPARATORS

REFERENCE &

ERROR AMP

DATEL, Inc., Mansfield, MA 02048 (USA) · Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 · Email: sales@datel.com · Internet: www.datel.com

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