Product category: DC/DC Convertors
News Release from: Texas Instruments (April 2001-March 2006) | Subject: PTB78520W
Edited by the Electronicstalk Editorial Team on 4 October 2004
Module takes power sequencing onboard
Texas Instruments has a new 20A, wide-input (18 to 60V), isolated DC/DC plug-in power module with Auto-Track sequencing technology
The highly efficient new module simultaneously powers up with any downstream, nonisolated, Auto-Track compliant point-of-load module. TI's easy-to-use PTB78520W provides greater design flexibility to 24 and 48V telecomms and computing distributed power systems, including complex digital systems requiring power sequencing of multiple power supply rails.
This article was originally published on Electronicstalk on 4 October 2004 at 8.00am (UK)
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Achieving power conversion efficiency up to 90%, the module provides two high-current outputs that are both regulated to the same output voltage.
The first output incorporates soft start and a remote on/off control.
The second output is switched, which allows the user to control the output voltage with the Auto-Track function.
The switched output tracks the voltage present at the track I/O pin.
The PTB78520W's switched output design is ideal for applications requiring simultaneous power up of nonisolated point-of-load (POL) modules, such as TI's PTH series of POLA plug-in modules.
The switched design also eliminates the need for extra FETs and control circuits for sequencing a 3.3V intermediate bus.
TI's Auto-Track technology provides easy-to-use sequencing control to simplify the power-up sequencing of multiple modules.
A single control pin connects to the Auto-Track pin of nonisolated POL modules to accommodate various sequencing requirements.
TI's PTB78520W module comes in a horizontal through-hole or surface-mount package that measures 36.8 x 56.3 x 12.5mm.
The power modules are available in volume production from TI and its authorised distributors.
Pricing per module in quantities of 1000 is $62.
Lead (Pb)-free and RoHS-compatible versions available in the fourth quarter of 2005.
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