48V lead-acid/Li-ion battery charger 2kW high efficient natural convection cooled evaluation board based on CoolMOS™ P7
The 2kW lead-acid / Li-ion industrial battery charger targets LSEV applications. The evaluation board uses a dual-boost PFC + half-bridge LLC power supply solution. Infineon’s latest CoolMOS™ P7 Superjunction MOSFETenables natural convection cooling. The design has a battery management control system capable of charging both lead-acid and Li-ion based 48V batteries in the different charging modes. The charging profiles correspond to the latest trends of battery charging. Furthermore, the evaluation board offers the possibility to set the nominal battery capacity in order to adjust the charging currents of different battery sizes. In addition to this, it grants a parallel operation of two modules that can extract 4kW maximum charging power. This enables fast charging for Li-ion batteries.
The 2kW evaluation board is designed to operate at a wide range input from 90VAC up to 265VAC to charge lead-acid and Li-ion batteries of 48VDC. The charger also gives the possibility for a battery capacity selection (from 40Ah up to 250Ah). The design comes with an integrated error indication and handling system. It is programmed not only to de-rate output power at PCB temperature of 105°C and shutdown at 115°C, but it also adopts the charging profile by sensing the battery voltage and temperature.
Furthermore, the design can be modified to support higher output voltage (72V and 144V). For detailed information, please refer to the application note.
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Application note evaluation board EVAL_2KW_48V_CHAR_P7
01_01 | Mar 23, 2022 | PDF | 7.8 mb