Features

• Dual Complementary Outputs

(±5 V, ±12 V)

• Input Voltage Range:

36 V to 75 V

• On/Off Enable for Sequencing

• 1500 VDC Isolation

• Over-Current Protection

• Over-Temperature Shutdown

• Under-Voltage Lockout

• Temp Range: –40 to +85 °C

• Industry Standard Outline

• Fixed Frequency Operation

• Synchronizes with PTB48500

• Powers line driver ICs for AC-7

and other xDSL chipsets

• Safety Approvals: (Pending):

EN60950

UL/cUL60950

Description

The PTB48580 series of isolated

DC/DC converter modules produce a

complementary pair of regulated supply

voltages for powering line-driver ICs in

xDSL telecom applications. The modules

operate from a standard telecom

(-48 V) central office (CO) supply and

can provide up to a 30 W of power in a

balanced load configuration.

The A-suffix module (±5 V) is designed

to power the line driver ICs for the AC-7

ADSL chipset. Other voltage options will

power other analog applications requiring

a complementary supply with relatively

balanced loads. The outputs can also be

easily configured for single-ended use.

The modules incorporate an On/Off

enable control, output current limit,

over-temperature protection, and input

under-voltage lockout (UVLO) as standard

features.

The control inputs, “Enable” and

“Sync In,” are compatible with the

“EN Out” and “Sync Out” signals of

the PTB48500 DC/DC converter.

This allows the power-up and switching

frequency of the PTB48580 series to be

directly controlled from a PTB48500.

Together a PTB48500 and a PTB48580A

converter meet all the system power

and sequencing requirements of an AC-7

ADSL chipset.

The PTB48580 series uses doublesided

surface mount contruction. The

package size is based on an industry

standard outline and does not require a

heatsink. Both through-hole and surface

mount pin configurations are available.