Universal AC input, 30V (max)/6A output lead-acid battery charger reference design with PFC

The PMP10110 is designed to convert universal input AC voltage to an isolated 17V...30V@6A, suitable for charging lead-acid and lithium-ion batteries. The converter is a constant voltage and constant current generator, the set points for output voltage (charge level) and current can be set via two PWM signals. The first stage is the PFC boost stage, while isolation and current stabilization are performed by the DC-DC half-bridge stage. The isolated quasi-resonant flyback converter provides all internal voltages and some additional current to the external load (fan or analog section), specifically 12V@400mA and 5V@300mA.

characteristic

• ● The first stage is a CCM PFC boost stage driven by UCC28180, which exhibits high efficiency and low EMI characteristics.
• ● The second stage is a DC/DC half-bridge, which contains both current and voltage loops; using the PWM signal as the reference for voltage and current
• ● The auxiliary power supply generates all voltages required; the network will disconnect all resistors associated with high voltages to reduce standby losses
• ● Over the entire input voltage range, plug-to-plug efficiency at full load: 86%...92%
• ● The design has been tested and includes test results and CAD files