Automotive CXPI Communication Application Circuit C (LED Ambient Light Drive Board / CXPI Responder Node)

CXPI, a next‑generation automotive communication protocol, delivers low cost and high responsiveness to support efficient control of various in‑vehicle functions.
This reference design demonstrates an example of a CXPI responder node, implemented as an LED ambient light driving board with an integrated CXPI interface.
The CXPI interface IC TB9033FTG is employed, and four PWM outputs selected from its 16-channel GPIO are utilized to provide flexible control of WRGB LEDs.

Board Appearance
Board Appearance
DF2B29FU DF2B29FU TB9033FTG SSM3K341R SSM3K341R SSM3K341R SSM3K341R SSM3K341R

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Features

  • Supports next‑generation in‑vehicle communication protocol CXPI (ISO 20794‑2~4, ISO 14229‑8).
  • Equipped with a CXPI interface IC featuring 16‑channel GPIO, supporting PWM output, AD input switching, and various I/O control functions.
  • Control multicolor LED ambient lighting by driving N‑channel MOSFETs with PWM signals from GPIO.
  • Outer dimensions: 100mm x 100mm

Specifications

Main Ics CXPI Interface IC TB9033FTG
Input Power Supply Voltage VBAT: DC 6V to 16V (Typ. 12V), LED: DC Max. 24V
Functional blocks CXPI Communication Circuit, LED Ambient Light Drive Circuit
Control Method PWM

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Design Data

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*1:Actual PCB was designed on CR8000BD. The other files were made from CR8000BD file.

*2:The data was generated on CR8000BD.

Used Toshiba Items

Part Number Device Category Application Area – Qty Description
Network communication IC CXPI Communication Circuit・1 CXPI Interface H/W logic IC with configurable 16ch I/O
Small Low ON resistance MOSFETs LED Ambient Light Drive Circuit・4 N-ch MOSFET, 60 V, 6.0 A, 0.036 Ω@10V, SOT-23F
ESD protection diode (bi-directional type) CXPI Communication Circuit・1 Bidirectional TVS Diode (ESD Protection Diode), +/-24 V, SOD-323(USC)

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Such as high efficiency, low power consumption and miniaturization are important in designing LED lighting. Toshiba provides information on a wide range of semiconductor products suitable for power supply units, sensor signal input units, etc., along with circuit configuration examples.
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