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70_V_INPUT_5_V_700_mA_TELECOM_CONVERTER

2014-11-08 18:57  
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70_V_INPUT_5_V_700_mA_TELECOM_CONVERTER
Telecom dc-to-dc conversion applications are usually complex because of the wide input voltage range of -30 to -70 V. Either big, expensive converter modules or space- and component-intensive discrete solutions are normally required to handle these higher voltages. The LT1082 contains a 1-A switch that can handle 100 V, enabling a -48-V-to-5-V converter to be designed with minimal size and cost. Features include foldback of the 60-kHz switching frequency under short-circuit condi-tions, protecting the LT1082 and power components from excessive power dissipation. The LT1082 dc-to-dc converter circuit provides up to 750 mA of output current, and the solution costs less than a modular supply of similar capabilities.