PT3320

30 WATT ISOLATED

DC/DC CONVERTER

Series

Standard Application

Cin = Optional 100µF/100V electrolytic

Cout = Required 330µF electrolytic

Q

1

= NFET

PT3320

7-9

4-6

14-17

+V

IN

-V

IN

+V

O

C

OUT

+

C

IN

+

19

+REMOTE SENSE

10-12

2

LOAD

18

-V

O

13

Q

1

-REMOTE SENSE

Inhibit

V

36V to 75V

approval pending

Features

The PT3320 is a new series of high-

input voltage, 30 Watt, isolated DC to

DC converters housed in a unique

vertical or horizontal 19-pin SIP pack-

age. The 36 to 75V input range allows

easy integration into many distributed

power applications which utilize 48V bus

architectures.

The PT3320 series is available with

output voltages from 2V to 15V. The

output voltage is adjustable from 90 to

110% of nominal with the addition of an

external resistor. Other easy to use

features include an inhibit function and

differential remote sense which auto-

matically compensates for any voltage

drop from the converter to the load. The

PT3320 includes built in current limit,

short circuit protection and over-

temperature shutdown.

The PT3320 requires a 330µF output

capacitor for proper operation.

(For dimensions and PC board layout,

see Package Styles 840 and 850.)

Case/Pin

Configuration

Vertical Through-Hole

N

Horizontal Through-Hole

A

Horizontal Surface Mount

C

Ordering Information

PT3321

¨ = 3.3V/8A

PT3322

¨ = 5.0V/6A

PT3323

¨ = 12.0V/2.5A

PT3324

¨ = 15.0V/2A

PT3325

¨ = 2.0V/8A

PT3326

¨ = 2.5V/8A

PT3327

¨ = 1.8V/8A

PT3328

¨ = 5.2V/6A

Preliminary Specifications

Characteristics

PT3320 SERIES

(T

°C unless noted)

Symbols

Conditions

Min

Typ

Max

Units

Output Current

0.25

—

8.0

A

0.25

—

6.0

A

0.1

—

2.5

A

On/Off Standby Current

—8

16

mA

Short Circuit Current

—

—A

Input Voltage Range

36.0

48.0

75.0

V

Output Voltage Tolerance

—

±1.0

—

Line Regulation

—

±0.5

—

Load Regulation

—

±0.5

—

—

1.0

—

—

50

—

Transient Response

50% load change, 1A/µSec

—

100

—

µSec

—

3.0

—

Efficiency

η

—

80

—

%

—

84

—

%

—

85

—

%

Switching Frequency

600

750

900

kHz

400

500

600

kHz

Recommended Operating

-40*

—

+85

°C

Temperature Range

Airflow = 200 LFM

Storage Temperature

—

-40

—

+125

°C

Mechanical Shock

—

Per Mil-Std-883D, method 2002.3,

—

500

—

G’s

1mS, half-sine, mounted to a fixture

Mechanical Vibration

—

Per Mil-Std-883D, method 2007.2,

—10

—

G’s

20-2000Hz, soldered in a PC board

Weight

—

—

—

40

—

grams

Input/Output Isolation

—

—

1500

—

—

VDC

Capacitance

—

—

—

1200

—

pF

Resistance

—

—

10

—

—

M

Ω

Flammability

—

Materials meet UL 94V-0

Inhibit (pin 2)

On**

2.5

—

15

VDC

Off

0

—

0.8

VDC

* At temperatures below 0°C, the PT3320 series requires output capacitors with temperature stable dielectrics

such as tantalum or Oscon.

** If pin 2 is left open, the PT3320 will operate when input power is applied.

Pin-Out Information

Pin Function

1

Do Not Use

2

Inhibit

3

Do Not Use

Pin Function

10

11

12

13

-Remote Sense

14

15

16

17

18

19

+Remote Sense

* Note:

This product is the

subject of one or more patents.

Other patents pending.

Patent pending*

New 30W

Isolated

SIPs

Revised 5/19/99

Application Notes

Mechanical Outline

Product Selector Guide