PTB48510B

The PTB4851x series of isolated DC/DC converter modules produce a complementary pair of regulated supply voltages for powering line-driver devices in xDSL telecom applications. The modules operate from a standard telecom (–48 V) central office (CO) supply and can provide up to a 72 W of power in a balanced load configuration.

The A-suffix module (±5 V) is designed to power the line driver devices for the AC-7 ADSL chipset. Other voltage options powers other analog applications requiring a complementary supply with relatively balanced loads.o

Both the PTB48510 and PTB48511 include an "on/off" enable control, output current limit, over-temperature protection, and input under-voltage lockout (UVLO). The PTB48511 adds output overvoltage protection (OVP).

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 PTB4851x modules to be directly controlled from a PTB48500. Together the PTB48500 and PTB4851xA converters meet all the system power and sequencing requirements of the AC-ADSL chipset.

The PTB4851x uses double-sided surface mount technology contruction. The package size is based on the industry standard outline and does not require a heatsink. Both through-hole and surface mount pin configurations are available.