Automotive High Efficiency Power Front End and Multi-Phase Processor Supply Reference Design
Description
This processor supply reference design is an automotive power solution for use in highperformance: single-core-voltage application processors in advanced driver assistance systems (ADASs). This design can support core supply currents up to 10 A at 0.9 V. The design can also operate with a wide input voltage range: withstand reverse battery conditions: and support start-stop and cold-crank down to a 3.5-V input with an undisturbed output. The sub-AM band switching frequency of the power front end improves efficiency and reduces board temperatures when compared to a power front end with faster switching frequency. The multiphase configuration and integration of supplies enables lower electromagnetic interference (EMI) and higher efficiency. This reference design also provides results for conducted emissions tests for CISPR 25 Class 5.
Features
- 5A integrated: 400kHz synchronous wide input voltage buck DC/DC converter with spread spectrumSupplying 10A at 0.9V to core-voltage rail of application processorOperating range 3.5 - 36V: supports start-stop and cold-crankInterleaved four-phase core-voltage supply minimizing ripple: EMI and inductor sizeSmart diode reverse battery protection for minimum voltage drop (typical 20mV)Small switched cap boost for 5V CAN supply reduces solution size and BOM cost
Applications
- Front camera
- Surround view system ECU
- Aircraft cockpit display
- Interconnect/distribution box
- ADAS domain controller
- Laser distance meter
- Mirror replacement/camera mirror system
- Drive assist ECU
- Driver vital sign monitoring
- Conditionally automated drive controller
- Circuit breaker (ACB
- MCCB
- VCB)
Product Categories
- Power management