DC/DC CONVERTERS

High Current, High Efficiency, Low Profile

1

2 YEAR WARRANTY

NEW Product

All specifications are typical at nominal input, full load at 25 °C ambient unless otherwise stated

SPECIFICATIONS

File Name: quarter_brick_dual.pdf Rev (01): 29 Mar 2006

fast transient load response

These are new high efficiency, open-frame, isolated 40 A converters in an industry standard dual

quarter-brick footprint. These converters deliver high output current at low voltages, and excel-

lent useable power density for today’s high end applications. This series features an input volt-

age range of 36 Vdc to 75 Vdc and output voltages of 1.2 V/3.3 V, 1.5 V/3.3 V, 1.8 V/3.3 V 2.5

V/3.3 V, and 5 V/3.3 V. The output voltage on each model is adjustable from 90% to 110% of

the nominal value. Typical efficiencies are 90%. This series also has a remote ON/OFF capabili-

ty. Over-current and over-voltage protection features are included as standard. Designed to

meet international safety agency approvals, including EN60950-1 and UL/cUL60950, this series

reduces compliance costs and time to market.

Quarter-Brick Series

Dual output

OUTPUT SPECIFICATIONS

Voltage adjustability

Both outputs

±10% min.

Minimum load

Both outputs

0%

Ripple and noise

20 MHz bandwidth

50 mV pk-pk max.

15 mV rms max.

Short circuit protection

Both outputs

Turn-on characteristics

Both outputs

Monotonic

INPUT SPECIFICATIONS

Input voltage range

48 V nominal

36-75 Vdc

Input current

No load

80 mA max.

Remote OFF

6 mA max.

Active high remote ON/OFF

Logic compatibility

Open collector ref to -input

ON

Open circuit or >2.4 Vdc

OFF

<0.4 Vdc

Undervoltage lockout

Power up

35.5 V (typ.)

Power down

33.5 V (typ.)

Start-up time

Power up

14 ms (typ.)

Remote ON/OFF

14 ms (typ.)

Patent No. 6,765,810

Other Patents Pending

International Safety Standard Approvals

UL/cUL CAN/CSA 22.2 No. 60950-00 : UL 60950

File No. E135734/60950

VDE Certificate No. 10401-3336-0197

EMC CHARACTERISTICS

Immunity:

ESD air enclosure

EN61000-4-2 8 kV/6 kV(O/P within spec.)

Radiated field enclosure

EN61000-4-3 10 V/m

(O/P within spec.)

Conducted

EN61000-4-6 10 V

(O/P within spec.)

Input transients

100 V, 100 ms

GENERAL SPECIFICATIONS

Efficiency

See table

Basic insulation

Input/output

2250 Vdc

Switching frequency

Fixed

480 kHz

Approvals and

(See Notes 1 and 2)

EN60950-1 VDE

standards

UL/cUL 60950

Material flammability

UL94V-0

Weight

34 g (1.2 oz)

MTBF

Telcordia Tech SR-332 2,883,816 hours

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating ambient.,

-40 °C to +85 °C

temperature

Non-operating

-55 °C to +125 °C

PROTECTION

Short-circuit

Continuous

Overvoltage

Non-latching

Thermal

125 ºC hot spot temperature with

automatic recovery