Fast Capacitor Charger with SEPIC Topology (42V to 52Vin: 160V/180Vout @ 900mA) Reference Design
Description
A SEPIC converter is used to fast charge a load capacitor up to 160V/180V (selectable). The input voltage range is 47V +/-10% and the constant output charging current 900mA. The SEPIC topology has the advantage to Boost or Buck the output voltage: needed by capacitor charging: since they start at zero volt (short circuit).
Features
- No spikes on the drain of main FET: thanks to SEPIC topologyGood efficiency curve (>91%) at full load and with output voltage >80VTwo active loops: CV and CC stabilize the output voltage in all conditions: during charging and in steady stateThe output voltage can be switched between 160V and 180V on the fly
Applications
Product Categories
- Power management