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Features

6.5V to 17.5V

Description

The PT4475 Excalibur™ module

combines state-of-the-art power

conversion technology with un-

paralleled flexibility. Operating off a

standard 24V telecom input, the PT4475

provides a full 100W output at load

currents up to 8.5A, and over the

programmable output voltage range of

6.5V to 17.5V.

The PT4475 features high efficiency,

ultra-fast transient response, and the

capability for true N+1 current sharing.

This product also includes output short

circuit and over-temperature protection.

L

O

A

D

PT4475

+V

sns

+V

out

-V

out

-V

sns

7

8-13

14-19

20

21

25

22

24

23

VID0 - VID4

+V

in

–V

in

1

2

3

Inhibit

C

1

+

PROGRAMMING PINS

+V

OUT

+V

IN

–V

IN

–V

OUT

C

2

Standard Application

• Programming pins, VID0–VID4, are shown

configured for Vo =12.0V

• For normal operation, pin 3 (Inhibit) must be

connected to –Vin.

• For operation in N+1 configuration, consult the

related application note.

• Pins 6 & 26 are used for N+1 configurations only.

100-W 8.5-A Programmable

Isolated DC/DC Converter

PT4475—24V

SLTS128A

(Revised 9/4/2001)

Specifications

Characteristics

Conditions

PT4475

(T

°C unless noted)

Symbols

(V

Min

Typ

Max

Units

Output Current

0.1

—

A

Current Limit

—

10

—

A

Current Sharing

——±10

%

Input Voltage Range

18

24

36

V

Output Voltage Tolerance

—

±1.0

±2.0

Line Regulation

—

±0.1

±1.0

Load Regulation

—

±0.5

±1.0

—

120

150

Transient Response

—

N/A

—

µSec

—

1.0

—

—

200

—

µSec

—

5

—

At turn-on

—

—

10

mSec

Efficiency

η

—

89

—

%

Switching Frequency

—

—

300

—

kHz

Remote On/Off

Off

+2.5

—

+75.0

VDC

On

-0.5

—

+0.8

Over-Voltage Protection

OVP

Shutdown and latch off

—

125

—

Isolation

—

—

1500

—

—

VDC

Operating Temperature Range

Measured at center of case

–40

—

+100

°C

Over-Temperature Shutdown

OTP

Case temperature - Auto reset

—

+110

—

°C

Storage Temperature

—

-40

—

+125

°C

Reliability

MTBF

Per Bellcore TR-332

1.7

—

—

10

6

Hrs

50% stress, t =40°C, ground benign

Mechanical Shock

—

Per Mil-STD-883D, Method 2002.3,

—

500

—

G’s

1mS, Half-sine, mounted to a fixture

Mechanical Vibration

—

Vertical (Suffix N)

—

—G’s

(Mil-STD-883D, 20-2000Hz)

Horizontal (Suffixes A, C)

Weight

—

—

—

90

—

grams

Notes:

(2) Only the case pins on the through-hole package types (suffixes N & A) must be soldered. For more information see the applicable package outline drawing.