LM5046

LM5046 Based Eighth Brick Reference Board LM5046 Based Eighth Brick Reference Board National Semiconductor Application Note 2126 Ajay Hari March 4, 2011 Introduction The LM5046 reference board is designed based on the phase-shifted full-bridge topology. This board is for reference only and is intended to demonstrate the capability of the LM5046. Hardware is not provided for evaluation. Please refer to AN2115 for LM5046 evaluation board. The reference board is in an industry standard eighth brick footprint. The performance of the evaluation board is as follows: • Input operating range: 36V to 75V • Output voltage: 12V • Measured efficiency at 48V: 92% @ 10A • Frequency of operation: 420kHz • Board size: 2.28 x 0.89 x 0.4 inches • Load Regulation: 0.2% • Line Regulation: 0.1% • Line UVLO (34V/32V on/off) • Hiccup Mode Current Limit The printed circuit board consists of 10 layers; 2 ounce copper outer layers and 3 ounce copper inner layers on FR4 material with a total thickness of 0.12 inches. The unit is designed for continuous operation at rated load at