This reference design demonstrates a power supply system for infotainment display modules with common system requirements like cold crank, load dump, and Automotive Safety Integrity Level (ASIL). The LM74900-Q1 is the first stage of the design playing a role of protection for negative input voltage, undervoltage, locked output, and overcurrent protection. The LM5152-Q1 is the second stage to function as pre-boost controller which can boost up to a specific voltage if battery voltage is low when starting up. The device supports battery voltages down to 4.2V and 100W power output. At the third stage, the design uses LMQ644A2-Q1, TPS62813-Q1, and TPS745-Q1 to provide the desired voltage to the subsystem like local dimming backlight, TCON, and SerDes. Lastly the design uses voltage monitors to monitor each rail and to aid ISO 26262 system design to achieve the targeted ASIL.

• LM74900-Q1 is the automotive ideal diode with circuit breaker, undervoltage (UV), and overvoltage (OV) protection with fault output
• LM5152-Q1 is the automotive low-I_Q synchronous boost controller for start-stop and backup battery power supply
• LMQ644A2-Q1 is the 3V to 36V, low-I_Q, dual 6A automotive buck converter optimized for power density and low EMI
• TPS37-Q1 is the wide V_IN, 65V dual channel OV and UV detector with programmable sense and reset delay function for automotive
• TPS3704-Q1 is the low V_IN automotive quad window or standard voltage supervisor
• Total 100W power rating with 4.2V battery voltage input
• Reference design aids ISO 26262 system design to achieve the targeted ASIL