The first model available offers a 28V nominal output and is designed to support the popular use of LDMOS technology used in high power wireless base station (BTS) deployments. The ADH700 series nominal 28V model can deliver up to 28A output current and offers a trim range of 14V to 33V. Housed in the industry standard half-brick format (2.4 x 2.3 inches or 61.0 x 57.9 mm) the ADH700 series is 0.5 inch or 12.7 mm high. The dc-dc converter series offers greater than 95% typical efficiency and a wide input range of 36 to 65 V. An aluminium baseplate structure aids thermal performance. The 28V model can operate between -40 and +85C ambient temperature, and can continue to operate at full power up to 100C baseplate temperature – all without [forced] air cooling. The conversion technology employs 280 kHz fixed-frequency switching to help minimize external EMI filtering requirements.
Other features include remote enable, remote output sense and trim with protection features such as input under voltage lockout, output over current protection, output over voltage protection, and over temperature protection. No minimum load requirement helps to increase reliability and contributes to an MTBF of 2 million hours (calculated according to Telcordia SR-332-2006).
Artesyn Embedded Technologies; www.artesyn.com