rohm referencedesigns

refrpt001

refrpt001reference design / application evaluation kit | rohm co., ltd.-ag旗舰平台尊龙

cispr25 class5 compliant 8 rails power tree reference design for automotive adas/infotainment application

this reference design is a power tree solution board developed for infotainment devices such as automotive clusters and center information displays and for ecus for adas application. the power system that can support functional safety is integrated on a single board to achieve the optimal configuration as a power tree. excellent emc performance that meets cispr25 class 5 even at all power supply rails are enabled, and reduces heat generation of each device by distributing high-efficiency dcdcs. in addition, two supervisor ics with self-diagnosis functions can monitor the output of all power rails and contribute to a higher level of functional safety.


  • automotive infotainment/adas 8-channels power tree reference design
  • verified to satisfy emc cispr 25 class 5 standard without common mode filter
  • in order to avoid the am radio frequency bands all dc/dc converters operate at a switching frequency of 2.2 mhz or higher.
  • thermal characteristics tested
  • voltage monitoring for 8-channel power tree to improve the functional safety asil level
  • space saving by integrating multiple power trees
refrpt001-evk-001
part no. specifications power supply configuration in the refrpt001-evk-001
vin [v] vout [v] iout [a]
for automotive 3.5v to 40v input,
1a single 2.2mhz buck dc/dc converter
9.0~16.0 5.0 1.0
for automotive 2.7v to 5.5v input,
2a single synchronous buck dc/dc converter
(internal 5.0v) 1.25 1.25
bd00ia5mefj-m for automotive 0.5a,
0.8~4.5v variable output ldo regulator
(internal 5.0v) 3.3 0.2
for automotive 3.5v to 40v input,
2a single 2.2mhz buck dc/dc converter
9.0~16.0 3.3 2.0
for automotive 2.7v to 5.5v input,
4a integrated mosfet single synchronous buck dc/dc converter
(internal 3.3v) 1.0 1.5
for automotive 2.7v to 5.5v input,
3a integrated mosfet single synchronous buck dc/dc converter
(internal 3.3v) 1.5 1.0
for automotive 2.7v to 5.5v input,
2a single synchronous buck dc/dc converter
(internal 3.3v) 1.8 0.5
rv4c020zphzg 20v, 2a pch mosfet (internal 3.3v) 3.3 0.15
for automotive
low vf, 60v, 3a, sod-128, schottky barrier diode
9.0~16.0 - -
bd39040muf-c for automotive
system power good watchdog timer reset
(internal 5.0v) - -
bd39040muf-c for automotive
system power good watchdog timer reset
(internal 3.3v) - -

related documents

 
  • refrpt001-evk-001

design resources

 
  • refrpt001-evk-001

specifications

 
board number input voltage output channel output voltage emc performance size
refrpt001-evk-001 9.0v to 16.0v 8ch 5.0v x2/3.3v x2/1.8v/1.5v/1.25v/1.0v verified to satisfy cispr 25 class 5 121.9mm x 96.5mm

distribution inventory

 
board number distributor quantity available
refrpt001-evk-001 -

key components

 
board number part number product category datasheet status spice ltspice thermal model symbol & footprint 3d step samacsys ecad library calc tool rohm solution simulator
refrpt001-evk-001 bd00ia5mefj-m linear regulators active solution simulator
refrpt001-evk-001 bd39040muf-c voltage detectors (reset ics) recommended -
refrpt001-evk-001 bd9p105efv-c dc-dc converter ics active solution simulator
refrpt001-evk-001 bd9p205efv-c dc-dc converter ics active solution simulator
refrpt001-evk-001 bd9s201nux-c dc-dc converter ics recommended solution simulator
refrpt001-evk-001 bd9s300muf-c dc-dc converter ics recommended solution simulator
refrpt001-evk-001 bd9s400muf-c dc-dc converter ics recommended solution simulator
refrpt001-evk-001 rbr3lam60btf schottky barrier diodes recommended -
refrpt001-evk-001 rv4c020zphzg automotive mosfets recommended -