The PTB48560x is a series of 30-W rated isolated dc/dc converters, designed to operate from a standard -48-V telecom central office (CO) supply. Housed in a _1×2_ package, each model has a wide-adjust output voltage that can be set to one of the common intermediate bus voltages of 3.3 V, 5 V, or 12 V.
●The PTB48560 series incorporates Auto-Track, a feature that simplifies the power-up sequencing of multiple power modules and operates from the same intermediate bus. During a power-up cycle, modules with this feature have the capability of following a common ramp voltage applied to an input called Track. The PTB48560 series is specifically designed to control the Track voltage of any number of nonisolated _downstream_ modules powered from its output. This ensures that the outputs of the downstream modules all rise simultaneously during power up. The PTB48560B (3.3 V) has an additional sequenced output, _VO Seq_, which also rises with the Track voltage. This allows the _VO Seq_ output to power up simultaneously with the outputs from other power modules under the control of Auto-Track.
●Whether used to facilitate power-up sequencing, or operated as a stand-alone module, the PTB48560 series includes many other features expected of high-performance dc/dc converter modules. Precise output voltage regulation is ensured with a differential remote sense. Operational features include an input undervoltage lockout (UVLO) and a dual-logic output enable control. Overcurrent and overtemperature protection ensure survival against load faults.
●Typical applications include distributed power architectures in both telecom and computing environments, particularly complex digital systems requiring power sequencing of multiple power supply rails.
● Input Voltage: 36 V to 75 V
● 30-W Total Output Power
● Output Voltages: 3.3 V, 5 V, and 12 V
● Wide-Output Adjust/Trim
● Up To 88% Efficiency
● Overcurrent Protection
● Overtemperature Shutdown
● Undervoltage Lockout
● Input Overvoltage Protection
● Auto-Track Power-Up Sequencing (Includes Sequenced Output with PTB48560B)
● Smart-Sense Remote Sensing (PTB48560B)
● Dual-Logic Enable Control
● Space-Saving _1×2_ Footprint
● Surface Mount Package
● 1500-Vdc Isolation
● Agency Approvals (Pending):
●UL/cUL 60950, EN 60950
● APPLICATIONS
● Intermediate Bus Architectures
● Telecom, High-End Computing Platforms
● Multi-Rail Power Systems with Power-Up Sequencing
●Auto-Track is a trademark of Texas Instruments.
