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PT4400 Series

75-W 48-V Input Isolated

DC/DC Converter

PT4401

VID4=1

VID4=0

VID3 VID2 VID1 VID0

Vout

Vout

1111

N/D *

1.30V

1110

2.10V

1.35V

1101

2.20V

1.40V

1100

2.30V

1.45V

1011

2.40V

1.50V

1010

2.50V

1.55V

1001

2.60V

1.60V

1000

2.70V

1.65V

0111

2.80V

1.70V

0110

2.90V

1.75V

0101

3.00V

1.80V

0100

3.10V

1.85V

0011

3.20V

1.90V

0010

3.30V

1.95V

0001

3.40V

2.00V

0000

3.50V

2.05V

Logic 0 =Pin 12 potential; (–)Remote Sense

Logic 1 =Open circuit (no pull-up resistors)

Environmental Specifications

Characteristics

Symbols

Conditions

Min

Typ

Max

Units

Operating Temperature Range

–40

—

°C

Storage Temperature

—

–40

—

+125

°C

Mechanical Shock

Per Mil-STD-883D, Method 2002.3

1 msec, ½ Sine, mounted

—

TBD

—

G’s

Mechanical Vibration

Mil-STD-883D, Method 2007.2

Vertical

—

—

G’s

20-2000 Hz, PCB mounted

Horizontal

—

—

Weight

—

Vertical/Horizontal

—

50

—

grams

ShutdownTemperature

OTP

Case temperature - auto reset

—

115

—

°C

Flammability

—

Meets UL 94V-O

Notes

(i) See SOA curves or consult factory for appropriate derating

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

Output Voltage Programming Information

Pin Descriptions

+Vin:

The positive input for the module with respect to

central office supply, this input is connected to the primary

system ground.

–Vin:

The negative input supply for the module, and the

0VDC reference for the Remote On/Off input. When

powering the module from a +48V supply, this input is

connected to the 48V(Return).

Remote On/Off:

A positive logic input that is referenced to

the module’s output. If this input is left open-circuit, the

module will produce an output whenever a valid input

source is applied.

VID0 – VID4:

Selects the set-point output voltage of the

converter according to the applicable program code.

VID0 – VID4 must either be connected to (–)Remote

Sense or left open circuit. Note: For the PT4402 & PT4403,

VID 4 is internally disabled and may be left open circuit.

+Vo:

is DC isolated from the input supply pins. If a negative

–Vo:

which is DC isolated from the input supply pins. This

output is normally connected to the secondary circuit

common when a positive output voltage is desired.

+Remote Sense:

Provides the converter with remote sense

capability to regulate the set-point voltage directly at the

load. When used with –Remote Sense, the regulation

circuitry will compensate for voltage drop between the

converter and the load. The pin may be left open circuit,

–Remote Sense:

This is the logic ‘0’ reference for the

inputs VID0 – VID4, and provides the converter with

remote sense capability when used in conjunction with

+Remote Sense. For optimum output voltage accuracy

PT4402

VID4=

Vout

N/D *

1.05V

1.10V

1.15V

1.20V

1.25V

1.30V

1.35V

1.40V

1.45V

1.50V

1.55V

1.60V

1.65V

1.70V

1.75V

PT4403

VID4=

Vout

N/D *

3.40V

3.56V

3.72V

3.88V

4.05V

4.21V

4.37V

4.53V

4.69V

4.86V

5.02V

5.18V

5.34V

5.50V

5.67V

* N/D = Output voltage is not defined

† VID 4 (pin 11) of PT4402 & PT4403 is don’t care (

×).