FW250F1 Datasheet FW250F1, FW300F1 | P1-P3

Data Sheet

July 2002

FW250F1 and FW300F1 Power Modules:

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 165 W to 198 W

The FW250F1 and FW300F1 Power Modules use advanced,

surface-mount technology and deliver high-quality, compact,

dc-dc conversion at an economical price.

Applications

■ Redundant and/or distributed power architectures

■ Telecommunications

■ Data processing

Options

■ Heat sinks available for extended operation

Features

■ Size: 61.0 mm x 116.8 mm x 13.5 mm

(2.40 in. x 4.60 in. x 0.53 in.)

■ Wide input voltage range

■ High efficiency: 79% typical

■ Parallel operation with load sharing

■ Output voltage set-point adjustment (trim)

■ Thermal protection

■ Synchronization

■ Power good signal

■ Output current monitor

■ Output overvoltage and overcurrent protection

■ Constant frequency

■ Case ground pin

■ Input-to-output isolation

■ Remote sense

■ Remote on/off

■ Short-circuit protection

■ Output overvoltage clamp

■ ISO9001 Certified manufacturing facilities

■

UL*

60950 Recognized,

CSA

†

22.2 No. 60950-00

Certified, VDE 0805 (IEC60950, 3rd ed.) Licensed

■ CE mark meets 73/23/EEC and 93/68/EEC

directives

‡

Description

The FW250F1 and FW300F1 Power Modules are dc-dc converters that operate over an input voltage range of

36 Vdc to 75 Vdc and provide a precisely regulated dc output. The outputs are fully isolated from the inputs,

allowing versatile polarity configurations and grounding connections. The modules have maximum power rat-

ings from 250 W to 300 W at a typical full-load efficiency of 79%.

Two or more modules may be paralleled with forced load sharing for redundant or enhanced power applications.

The package, which mounts on a printed-circuit board, accommodates a heat sink for high-temperature

applications.

is a registered trademark of Underwriters Laboratories, Inc.

†

CSA

is a registered trademark of Canadian Standards Association.

‡This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should

be followed. (The CE mark is placed on selected products.)

2 Tyco Electronics Corp..

Data Sheet

July 2002

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 165 W to 198 W

FW250F1 and FW300F1 Power Modules:

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are abso-

lute stress ratings only. Functional operation of the device is not implied at these or any other conditions in excess

of those given in the operations sections of the data sheet. Exposure to absolute maximum ratings for extended

periods can adversely affect device reliability.

Electrical Specifications

Unless otherwise indicated, specifications apply over all operating input voltage, resistive load, and temperature

conditions.

Table 1. Input Specifications

Fusing Considerations

CAUTION: This power module is not internally fused. An input line fuse must always be used.

This encapsulated power module can be used in a wide variety of applications, ranging from simple stand-alone

operation to an integrated part of a sophisticated power architecture. To preserve maximum flexibility, internal fus-

ing is not included; however, to achieve maximum safety and system protection, always use an input line fuse. The

safety agencies require a normal-blow, dc fuse with a maximum rating of 20 A (see Safety Considerations section).

Based on the information provided in this data sheet on inrush energy and maximum dc input current, the same

type of fuse with a lower rating can be used. Refer to the fuse manufacturer’s data for further information.

Parameter Symbol Min Max Unit

Input Voltage:

Continuous

Transient (100 ms)

VI, trans

—

100

Vdc

I/O Isolation Voltage — — 1500 V

Operating Case Temperature

(See Thermal Considerations section and

Figure 24.)

C –40 100 °C

Storage Temperature T

stg –55 125 °C

Parameter Symbol Min Typ Max Unit

Operating Input Voltage V

I 36 48 75 Vdc

Maximum Input Current (V

I = 0 V to 75 V):

FW250F1

FW300F1

I, max

II, max

—

Inrush Transient i

t——2.0A

Input Reflected-ripple Current, Peak-to-peak

(5 Hz to 20 MHz, 12 µH source impedance;

see Figure 14.)

——10—mAp-p

Input Ripple Rejection (120 Hz) — — 60 — dB

Tyco Electronics Corp.. 3

Data Sheet

July 2002

dc-dc Converters; 36 to 75 Vdc Input, 3.3 Vdc Output; 165 W to 198 W

FW250F1 and FW300F1 Power Modules:

Electrical Specifications (continued)

Table 2. Output Specifications

* These are manufacturing test limits. In some situations, results may differ.

† Please consult your sales representative or the factory.

Parameter Symbol Min Typ Max Unit

Output Voltage Set Point

I = 48 V; IO = IO, max; TC = 25 °C)

O, set 3.25 3.3 3.35 Vdc

Output Voltage

(Over all operating input voltage, resistive load, and

temperature conditions until end of life; see Figure 15

and Feature Descriptions.)

O 3.20 — 3.40 Vdc

Output Regulation:

Line (V

I = 36 V to 75 V)

Load (I

O = IO, min to IO, max)

Temperature (T

C = –40 °C to +100 °C)

—

0.01

0.05

0.1

0.2

Output Ripple and Noise Voltage

(See Figures 7, 8, and 16.):

RMS

Peak-to-peak (5 Hz to 20 MHz)

—

150

mVrms

mVp-p

Output Current

(At I

O < IO, min, the modules may exceed output ripple

specifications.):

FW250F1

FW300F1

0.5

—

Output Current-limit Inception

O = 90% of VO, set; see Feature Descriptions.)

O, cli 103* — 130* % IO, max

Output Short-circuit Current

O = 1.0 V; indefinite duration, no hiccup mode; see

Figures 3 and 4.)

———150% I

O, max

External Load Capacitance (total for one unit or

multiple paralleled units):

FW250F1

FW300F1

—

†

µF

Efficiency (V

I = 48 V; IO = IO, max; TC = 25 °C;

see Figures 5, 6, and 15.):

FW250F1

FW300F1

—

Switching Frequency — — 475 — kHz

Dynamic Response

(

∆IO/∆t = 1 A/10µs, VI = 48 V, TC = 25 °C; tested with

a 10 µF aluminum and a 1.0 µF ceramic capacitor

across the load; see Figures 9 through 12.):

Load Change from I

O = 50% to 75% of IO, max:

Peak Deviation

Settling Time (V

O < 10% of peak deviation)

Load Change from I

O = 50% to 25% of IO, max:

Peak Deviation

Settling Time (V

O < 10% of peak deviation)

—

200

—

O, set

µs

O, set

µs

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P20

FW250F1

Mfr. #:

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DC DC CONVERTER 3.3V 165W

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