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.
● Dual Complementary Outputs
●(±5 V, ±12 V, or ±15 V)
● Input Voltage Range: 36 V to 75 V
● On/Off Enable for Sequencing
● 1500 VDC Isolation
● Overcurrent Protection
● Overvoltage Protection (PTB48511 only)
● Over Temperature Shutdown
● Undervoltage Lockout
● Temperature Range: 40°C to 85°C
● Industry Standard Outline
● Fixed Frequency Operation
● Synchronizes with PTB48500
● Powers Line Drivers for AC-7 and Other xDSL Chipsets
● Safety Approvals:
● EN 60950
● UL/cUL 60950
