File Name: rfb300_350.pdf Rev: 03 Feb 2006

2 YEAR WARRANTY

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

External output capacitance required (See Note 4)

SPECIFICATIONS

RFB300/350 series is a high efficiency, enclosed, isolated dc-dc converter series in

an industry standard half-brick package that provides up to 350 W of output power.

The series delivers very high usable output power for today’s high performance RF

power amplifier and similar applications. The four models in the series feature an

input voltage range of 18 Vdc to 36 Vdc and 36 Vdc to 75 Vdc and an output

voltage of 12 V and 28 V. The output voltage is adjustable from 7.2 Vdc to 13.2 Vdc

or 16.8 Vdc to 29.4 Vdc (not to exceed 308 W for the RFB300 [300 W for the

RFB300-24S12] and 350 W for the RFB350). The series also has a remote ON/OFF

capability. Overcurrent, overvoltage and overtemperature protection features are

included as standard. Negative logic remote ON/OFF and other options are also

available. Full international safety approval including EN/IEC60950 VDE and

UL/cUL60950 reduces compliance costs and time to market.

RFB300/350 Series

24 Vin and 48 Vin single output

International Safety Standard Approvals

VDE0805/EN60950/IEC950 File No. 10401-3336-0198

Licence No. 40005395

UL/cUL CAN/CSA 22.2 No. 60950

UL 60950 File No. E135734

ABSOLUTE MAXIMUM RATINGS

Input voltage - peak

24 Vin

-0.5-50 Vdc

(100 ms max.,

48 Vin

-0.5-100 Vdc

1.0 % duty cycle max.)

Input voltage continuous 24 Vin

-0.5-40 Vdc

48 Vin

-0.5-80 Vdc

Adjust pin voltage (with

-0.5-12 Vdc

respect to -sense pin)

OUTPUT SPECIFICATIONS

Voltage adjustability

12 Vout

7.2-13.2 Vdc

28 Vout

16.8-29.4 Vdc

Min./max. load

12 Vout

0/25 A, 0/29.2 A

28 Vout

0/11 A, 0/12.5 A

Output load capacitance 12 Vout

470 µF to 4,700 µF

(See Note 10)

28 Vout

330 µF to 3,300 µF

Rise time

(See Note 12)

5 ms typ.

INPUT SPECIFICATIONS

Input current

24 Vin

23.8 A max. @ lo max.

(See Note 3)

48 Vin RFB300

11.2 A max. @ lo max.

48 Vin RFB350

13 A max. @ lo max.

Input reflected ripple

24 Vin

12 mA (pk-pk)

(See Note 4)

48 Vin 12 V model

42 mA (pk-pk)

48 Vin 28 V model

28 mA (pk-pk)

Input capacitance -

24 Vin

39 µF

Internal filter

48 Vin

13 µF

Inrush current

(See Note 11)

DC-DC CONVERTERS

300-350 W Half-Brick

1

NEW Product

EMC CHARACTERISTICS

Conducted emissions

EN55022

See Application Note 167

Radiated emissions

EN55022

See Application Note 167

GENERAL SPECIFICATIONS

Efficiency

24 Vin 12 V model

86%

24 Vin 28 V model

90%

Vin = Vin (nom),

48 Vin 12 V model

88%

Iout (max.)

48 Vin 28 V model

91%

Approvals and

VDE IEC60950

standards

IECEE CB, UL/cUL60950

Material Flammability

UL94V-0

Weight

0.5 inch tall version

110 g (3.88 oz.)

MTBF @ 55 ºC

12 V model

1,900,000 hours min.

Telcordia SR-332 Issue 1 28 V model

2,400,000 hours min.

ENVIRONMENTAL SPECIFICATIONS

Thermal performance

Operating baseplate, -40 ºC to +100 ºC

temperature

Non-operating

-40 ºC to +100 ºC

RC PIN ELECTRICAL INTERFACE

Open collector compatible

(See AN 167 for remote ON/OFF)

RC:

ON voltage

(See Note 13)

5 V min.

Open circuit voltage

5 V min, 11 V typ

13 V max.

High level leakage current (See Note 14)

-25 µA max.

OFF voltage

(See Note 15)

1.2 V max.

Low level input current

(See Note 16)

-250 µA max.