TI Develops 20-A Isolated Plug-In Power Module with Auto-Track

9/30/2004 - Texas Instruments announced a 20-A, wide-input (18 V to 60 V), isolated DC/DC plug-in power module with Auto-TrackTM sequencing technology. The highly efficient new module simultaneously powers up with any downstream, non-isolated, Auto-Track compliant point-of-load module. See www.ti.com/sc04209.

TI's easy-to-use PTB78520W provides greater design flexibility to 24-V and -48-V telecom and computing distributed power systems, including complex digital systems requiring power sequencing of multiple power supply rails. Achieving power conversion efficiency up to 90 percent, the module provides two high-current outputs that are both regulated to the same output voltage. The first output incorporates softstart 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 PTB78520Ws switched output design is ideal for applications requiring simultaneous power up of non-isolated point-of-load (POL) modules, such as TIs PTH series of POLATM 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 non-isolated POL modules to accommodate various sequencing requirements.

Key Features for PTB78520W:

Packaging, Pricing and Availability
TIs PTB78520W module comes in a horizontal through-hole or surface-mount package that measures 36.8 mm x 56.3 mm x 12.5 mm. The power modules are available in volume production from TI and its authorized distributors. Pricing per module in quantities of 1,000 is $62. Lead (Pb)-free & RoHS-compatible versions will be available in the fourth quarter of 2005. Application notes, reference designs and TIs new Power Management Selection Guide are available through power.ti.com.

Leading Portfolio of Battery and Power Management IC Technology
TI is focused on meeting the power design needs of customers through innovative products and technical support. TI leverages its analog and digital system expertise and manufacturing capabilities to provide high-performance, discrete and integrated power management solutions to fit any portable, line-powered, isolated or non-isolated power design challenge - from cell phones and PDAs to telecom, industrial and computing applications.

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