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Ordering Information

Code

Description

AH

Horiz. T/H

(ERV)

AS

(ERS)

Code

Voltage

A

±5 V

B

±12 V

Notes:

(1) Reference the applicable package reference drawing for the dimensions and PC board layout

(2) “Standard” option specifies 63/37, Sn/Pb pin solder material.

Pin Descriptions

+V

to –V

central office supply, this input is connected to the primary

system ground.

–V

0 VDC reference for the ‘Enable*’, and ‘Sync In’ signals.

When the module is powered from a +48-V supply, this

input is connected to the 48-V Return.

+V

enced to the ‘COM’ node. The voltage at ‘+V

same magnitude, but is the complement to that at ‘-V

–V

enced to the ‘COM’ node. The voltage at ‘-V

same magnitude, but is the complement to that at ‘+V

COM:

The secondary return reference for the module’s

regulated output voltages. This node is dc isolated from

the input supply pins.

±V

magnitude of both ‘+V

gether, either higher or lower than their preset value. If

not used, this pin should be left open circuit.

Enable*:

This is an open-collector (open-drain) negative

logic input that enables the module output. This pin is

module’s outputs, and a high impedance disables the

outputs. If this feature is not used the pin should be con-

“EN Out” pin of the PTB4850x enables the output voltages

from both converters (PTB4850x and PTB48580) to power

up in sequence.

Sync In:

This pin is used when the PTB48580 and PTB4850x

DC/DC converter modules are used together. Connect-

ing this pin to the ‘Sync Out’ of the PTB4850x module

allows the PTB48580 to be synchronized to the same

switch conversion frequency as the PTB4850x.

Characteristics

Symbols

Conditions

Min

Typ

Max

Units

Input Voltage Range

Over output load range

36

48

75

VDC

Isolation Voltage

Input–output/input–case

1500

—

—

V

Capacitance

Input to output

—

1500

—

pF

Resistance

Input to output

10

—

—

M

Ω

Operating Temperature Range

T

A

Over V

–40

—

+85

°C

Over-Temperature Protection

OTP

Shutdown threshold

—

—

°C

Hysterisis

—

10

—

Solder Reflow Temperature

Surface temperature of module body or pins

°C

Storage Temperature

—

–40

—

125

°C

Mechanical Shock

Per Mil-STD-883D, Method 2002.3

—

500

—

G’s

1 msec, ½ Sine, mounted

Mechanical Vibration

Mil-STD-883D, Method 2007.2

T/H

—

20

—

G’s

20-2000 Hz

SMD

—

5

—

Weight

—

—

13.5

—

grams

Flammability

—

Meets UL 94V-O

Notes:

(i) This parameter is guaranteed be design

(ii) During reflow of SMD package version do not elevate peak temperature of the module, pins or internal components above the stated maximum.

Order Prefix

Description

PTB48580xxx

Basic Model

PTB48580 Series

Dual Complementary-Output

DC/DC Converter for DSL

SLTS240 DECEMBER 2004

Not Recommended for New Designs