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Primarion unveils dual-output dual-phase DC/DC controller

Posted: 30 Apr 2007     Print Version  Bookmark and Share

Keywords:power conversion  power management  DC/DC controller 

Primarion's dual-output DC/DC controller

Primarion Inc. has unveiled the dual-output, dual-phase PX7522 for synchronous DC/DC converters in the telecom, datacom, computing and storage markets. As the third member of the company's Di-POL family of programmable digital power conversion and power management ICs, the device addresses both the OEM aspects of time to market and simple system-level communications.

The device supports dual-output operation, having two independent outputs with different voltages; and single-output operation with two phases, having the internal current balance and frequency sync between the phases.

As with the previous Di-POL products, the PX7522 features a PMBus serial interface, real-time current temperature and input voltage sense telemetry and an on-chip non-volatile memory (NVM) for user-friendly control and real-time system monitoring. The device operates on an output range of 0.5-8V and switching range of 150kHz to 1.4MHz. It also supports DCR and Rds(on) current sense and features a digital control loop and active voltage positioning.

Programmable configuration
The PMBus serial interface allows sequencing, margining and tracking, fault of the output voltage. The device is configurable to meet power system needs without the use of DSPs or MCUs. Configurations for controller can be easily loaded, edited and saved to the on-chip NVM over the I?C serial bus through the GUI.

"The PX7522 and the Di-POL product family address two aspects that are becoming increasingly important to OEMs?the first is time to market and the second is simple system-level communications," said Deepak Savadatti, VP of marketing for Primarion." A complete system can quickly and easily be built around the PX7522 and other members of the Di-POL product family with a simple GUI. The GUI enables designers to perform design, analysis and optimisation without having to devote time to software programming."

Reduced cost of BOM
Savadatti said most FPGAs and ASICs systems require two voltages because they have so much of digital logic in them, which need low voltage but very high current. In such systems, switches and routers would need a power management IC for sequencing and tracking. However, since such an IC does not provide the monitoring information for all the parts, an MCU is added to communicate back to the host, monitor the output voltage for the current voltage, temperature and fault, then provide the information back to the host.

Using the PX7522 eliminates the need for a power management ICs and MCUs. "In a way, the 7522 will cost higher than an analogue controller but the solution cost with the chip is much lower than an analogue. You will have at least 25 per cent saving on the BOM," he said.

Housed in RoHS-compliant, 6-by-6mm 40-lead QFN package, the PX7522 is sampling with top-tier customers. General sampling will be available this quarter.

- Rhea Barua
EE Times-Asia

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