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Astec, Tyco dc/dc series spark point-of-load applications

Posted: 09 May 2002 ?? ?Print Version ?Bookmark and Share

Keywords:axh010a0x? austin lynx? apc08? voltage converter? voltage conversion?

Tyco Electronics Power Systems here and Astec Power have both released industry-compatible dc/dc converter families that look to maximize the power-to-cost ratio in a compact size.

Tyco's Austin Lynx and Astec's APC08, are single-output, nonisolated devices designed for PC, telecom and datacom applications.

Tyco's AXH010A0x converters, in 16 surface-mount versions (33-by-13.5-by-7.37mm) and eight SIP models (101.6-by-12.7-by-8.38mm) deliver up to 10A at 0.9V to 3.3V and 33W from a 3.3V to 5V input.

"This product family delivers major enhancements in cost/power compared to previous solutions," said Sabi Varma, global director of marketing and operations. The Austin Lynx SIP is around half the price of its predecessor, the NH020, and the SMT version replaces the Austin Lite, to give twice the power at the same price.

Line regulation is 10.05 percent, load regulation is 10.1 percent and efficiency is as high as 92 percent. Output voltage trim adjustment goes 110 percent in all SIP models and half the SMT models.

These converters provide overvoltage, overtemperture, input undervoltage and autoreset output overcurrent protection, and remote on/off. Their mean time between failures is 2 million hours.

The APC08, Astec Power's first 25W point-of-load dc/dc converter, is available in six voltages (0.9, 1.2, 1.5, 1.8, 2.5, and 3.3 V) in a 33-by-13.5-by-8.38mm SMT package.

The 3.3V version delivers 8A at 89 percent efficiency from an input of 1.8V to 6V or 5V to 13V. A current-share option allows the converters to be operated in parallel for extra current.

The APC08, running at 400kHz, features a combined regulation of >3 percent over line, load and temperature, ripple and noise of 75mV for outputs >2.5V, and transient response of 5005s maximum.

Overvoltage, overcurrent and overtemperature protection are provided, with autorecovery of any protective shutdown once the fault is removed. The MTBF is 1 million hours.

Tyco's Austin Lynx is priced at $13.75 in lots of 1,000. Samples are available now. Astec's APC08 starts at $11.99 in similar quantities. Samples of the 3.3V model are available.

Vincent Biancomano

EE Times

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