98% Efficiency Analog 24V to 36V: 500W Backup and 50W Charger Reference Design for DC UPS

1 января 2018

This analog, bidirectional power conversion reference design has a discharge or boost stage of 500 W and charge or buck stage of 50 W. This reference design is made for 24-V battery pack and 30-V to 38-V bus voltage for use in DC-UPS, battery backup unit (BBU), local energy storage (LES) and DC/DC brick modules. The design’s high efficiency of >98% discharge and >95% charge optimizes the thermal management and extends battery backup time.

Особенности

High efficiency of 98.3% peak and 97.4% at full load as backup power supply Delivers high power output 20A, 30V as backup supply and charges battery at 2A during normal operation Fast changeover in <500 μs from charging to backup supply mode enables fast power transfer during power failure Compact solution with built-in heat sink (65 mm × 60 mm × 18 mm) Typical efficiency of ≈ 95%, maximum efficiency of > 98.5% Built-in analog solution for transition and CC-CV logic implemented reducing solution cost