A solar charging PCB for a 13S 5P lithium-ion battery pack. Charging design parameters: - Input voltage range: 40V to 56V - Battery voltage range: 39V to 54.6V - Input current limit: 12 A - Fast-charge current limit: 10 A - Switching frequency: 350kHz

48V-5V Linear DC Buck Converter

HCTI27156 https://static6.arrow.com/aropdfconversion/e678176cfa1390a35f9cebed6e845f990e3a56c4/hctiseriesdatasheet.pdf Inductor Power Shielded Toroid 27uH/15.7uH 15% 1KHz 15.6A 0.008Ohm DCR RDL 32.512 530-HCTI-27-15.6 https://www.mouser.co.uk/ProductDetail/Bel-Signal-Transformer/HCTI-27-15.6?qs=gt1LBUVyoHlXx9AG5hN7Sw%3D%3D Signal Transformer HCTI-27-15.6

SOT89_DIO ~

Through-hole pads meant to be soldered to 9-AWG wire

QFP50P900X900X120-48N Texas Instruments 1.2mm TQFP-48 Texas Instruments None https://www.snapeda.com/parts/BQ76952PFBR/Texas+Instruments/view-part/?ref=eda IPC7351B B https://www.snapeda.com/parts/BQ76952PFBR/Texas+Instruments/view-part/?ref=snap BQ76952PFBR

The BQ25750 is a wide input voltage, switched-mode buck-boost Li-Ion, Li-polymer, or LiFePO 4 battery charge controller with direct power path control. The device offers high-efficiency battery charging over a wide voltage range with accurate charge current and charge voltage regulation, in addition to automatic charge preconditioning, termination, and charge status indication. The device integrates all the loop compensation for the buck-boost converter, thereby providing a high density solution with ease of use. In reverse mode, the device draws power from the battery and regulates the SYS terminal voltage.