Small Automotive Front-End 16W Power Supply Reference Design

qwqwqw2088

Small Automotive Front-End 16W Power Supply Reference Design [Copy link]

This design is an automotive front-end power supply that provides 16W output to a 12V vehicle battery. The first stage is a pre-boost LM5150-Q1 to maintain a regulated mid-rail voltage of 8.5V during cold-crank operation. Two downstream buck converters are capable of handling fast-crank requirements up to 40V. Also, a built-in LC filter improves EMI behavior.

44mm x 32mm slim solution
Designed to handle 3.2V cold crank operation
Wide input voltage step-down power supply handles 40V fast start operation
Low EMI solution
Output power includes 5V (1.6A rail) and 3.3V (2.3A rail)
No electrolytic capacitors are used

Chip Manual

Wide Vin Automotive Low IQ Boost Controller View Design Kits & Evaluation Modules

Design source files

PMP30548 PCB

PMP30548 Assembly Drawing

PMP30548 Gerber

PMP30548 CAD Files

Design Test