Tyco Electronics Corp.

3

Data Sheet

May 1999

dc-dc Converter; 18 Vdc to 36 Vdc Input, 28 Vdc Output; 250 W

FC250R Power Module:

Table 2. Output Specifications

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

† Please consult your sales representative or the factory.

Table 3. Isolation Specifications

Parameter

Symbol

Min

Typ

Max

Unit

Output Voltage Set Point

27.45

28.0

28.55

Vdc

Output Voltage

(Over all operating input voltage, resistive load,

and temperature conditions until end of life; see

Figure 9 and Feature Descriptions.)

27.16

—

28.84

Vdc

Output Regulation:

—

—

—

—

—

—

0.01

0.05

100

0.1

0.2

300

%

%

mV

Output Ripple and Noise Voltage

(See Figures 4 and 10.):

RMS

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

—

—

—

—

—

—

50

100

mVrms

mVp-p

Output Current

ripple specifications.)

0.3

—

9.0

A

Output Current-limit Inception

103*

—

130*

Output Short-circuit Current

see Figure 2.)

—

—

—

150

External Load Capacitance

(total for one unit or multiple paralleled units)

—

330

—

†

µF

Efficiency

see Figures 3 and 9.)

η

—88—

%

Switching Frequency

—

—

500

—

kHz

Dynamic Response

(

with a 330 µF aluminum and a 1.0 µF ceramic

capacitor across the load); see Figures 5 and 6.):

Peak Deviation

Peak Deviation

—

—

—

—

—

—

—

—

300

250

400

250

—

—

—

—

mV

µs

mV

µs

Parameter

Min

Typ

Max

Unit

Isolation Capacitance

—

1700

—

pF

Isolation Resistance

10

—

—

M

Ω