3.3 Volts @ 30 Amps

100 Watt, DC/DC Converters

Single Output

UHP Models

Features

Figure 1. Simplified Schematic

INNOVATION and EXCELLENCE

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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

DATEL's fully isolated UHP series of DC/DC converters affords users a practical

solution for their low-voltage/high-current applications. With an input voltage range of

36 to 75 Volts, the UHP-3.3/30-D48 delivers 30 Amps of output current from a fully

regulated 3.3V output. Using both surface-mount technology and planar magnetics,

these converters are manufactured on a 2.3" x 2.4" open-frame package with an

industry-standard pinout configuration.

UHP converters utilize a full-bridge, fixed-frequency topology along with syn-

chronous output rectification to achieve a high efficiency of 89%. This efficiency,

coupled with the open-frame package that allows unrestricted air flow, reduces

internal component temperatures thereby allowing operation at elevated ambient

temperatures.

These DC/DC's provide output trim, sense pins and primary side on/off control

(available with positive or negative logic) or sync. Standard features also include

input overvoltage and undervoltage shutdown circuitry, output overvoltage protec-

tion, output short-circuit and current limiting protection and thermal shutdown. All

devices meet IEC950, UL1950 and EN60950 safety standards and carry the CE

mark (meet LVD) requirements). CB reports are available on request.

Regulated 3.3V output @ 30 Amps

Input range: 36V-75V

Open frame: 2.3" x 2.4" x 0.47"

Industry-standard package/pinout

Light weight: 2.24 ounces (63.5g)

Remose sense, Trim, On/Off Control

High efficiency: 89%

Fully isolated, 1500Vdc guaranteed

Input under and overvoltage shutdown

Output overvoltage protection

Short circuit protection; thermal shutdown

UL1950 and EN60950 safety approvals

CE mark

+INPUT

–INPUT

+SENSE

–SENSE

+3.3V OUTPUT

OUTPUT

RETURN

UV & OV

COMPARATORS

THERMAL

SHUTDOWN

PRIMARY

SWITCH

CONTROL

SECONDARY

SWITCH

CONTROL

PWM

CONTROLLER

REFERENCE &

ERROR AMP

OPTO

ISOLATION

PRELIMINARY