Power-One’s Z-One(TM) Digital IBA used in Xinwei Telecom's “Big Smart” Wireless Service

14th December 2005
ES Admin

Power-One, Inc today announced details on its Z-OneTM Digital IBA design win for Beijing Xinwei Telecom’s "Big Smart" SCDMA wireless service.

SCDMA incorporates advanced technologies, such as smart antenna, software radio, and synchronous wireless access protocol, to target a Chinese market projected to grow from 3 million users in 2005 to over 20 million by 2007. This extremely-complex application requires six different voltages, from 1.3 to 3.3VDC, with peak currents approaching 60 amps.

Xinwei’s Chief scientist, Dr. Guanghan Xu commented, “Using the Z-Series graphical user interface, we were able to configure a power system in less than ten minutes. This is extremely impressive considering that the diverse range of functionalities we implemented included paralleling, turn-on cascading, and fault management. Z-One Digital IBA saved weeks of design time compared to analog power management. The complex power requirements of our base station control board, combined with our need for on-the-fly reconfiguration, would have been extremely difficult to support without Power-One’s revolutionary Z-One Digital IBA.”

Steve Goldman, Power-One’s Chairman and CEO, commented, “We are very excited about the revenue-growth potential for this application. In November, it was announced that China‘s two fixed telecom network operators, China Netcom and China Telecom will be launching SCDMA networks. Xinwei’s growth potential has impressed others as well; they were ranked fifth in the first Deloitte Technology Fast 50 China Program and included in Red Herring’s list of the top 100 private companies in Asia.”

Mr. Goldman continued, “Although their control board uses eleven Point of Load (POL) converters, they only have to inventory one Z-Series POL part number due to the wide range of programmable attributes. In addition, a single Digital Power Manager controls all eleven POLs, their dc-dc front end, and I2C communications with their host system. This advanced functionality is only obtainable by using standard Z-Series components, available from Power-One and other Z-Alliance ™ members.”

The industry-standard I2C-compatible Z-7000 Series utilizes an extremely-scalable architecture that employs many revolutionary operating concepts. An extensive range of parameters, such as Vout for each POL, is user-programmed via I2C protocols, or through a graphical user interface, and stored in a Digital Power Manager. At system startup, the Digital Power Manager uses this stored information to initialize up to 32 POLs. After system initialization, ongoing bi-directional communications facilitate intelligent power system operation. Hardware-configurable Z-1000 POLs are also available for customers preferring power management without programming.

SCDMA -- also called Big Smart wireless phone service -- has been developed primarily by Xinwei, which has partnered with China Netcom, China Telecom, China Unicom and China Railcom to deploy services in rural areas. According to China’s Ministry of Information Industry (MII), SCDMA service has been deployed in 106 cities of 16 provinces across China. SCDMA is a highly efficient technology, requiring much fewer base stations to cover the same geographical area than the existing technology currently deployed in China. SCDMA operates in both the 400 MHz and 1800 MHz spectrum, with up to 3-kilometer base station (1800 MHz) coverage, 95 percent success ratio in base station switching, a 100 kilometer/hour mobile speed limit, and 0.05W transmission power.

Pictures of this application are available at

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