Motor Control _ Relay Driver

E523.02/12 (*SBC) | LIN2.x Relay Node SBC for 4/3 Relays


The Elmos System-Basis-Chip (SBC) family E523.02/12 controls controls four relays either low-side or high-side driven or three bistable relays (activation in sequential order). The relay holding current can be programmed by the external microcontroller via the PWM input pins.
The IC provides a LIN 2.x(1.3), SAE-J2602 compliant communication interface or PWM-interface with error feedback capability, which can be accessed by an external micro-controller. Also integrated functions are, system power supply (3.3V or 5V selectable) for an external μC and an independent window-watchdog .
The IC is configured and controlled over an SPI interface together with one PWM input pin for each relay driver. A set of diagnostic functions is provided, the status information can be read out via SPI. The LIN interface supports a “FLASH Mode” for fast upload of new firmware to the external micro- controller. For fast time-to-market Elmos provides demoboards as well as design-in support.


  • Voltage range 7V to 28V (5V to 42V peak)
  • Controls 4 relays, low- or high-side driven or 3 bistable relays
  • Relay pull-in and holding current can be controlled via PWM input
  • Power supply 3.3V or 5VC for external controller
  • LIN 2.x interface (1.3), SAE-J2602 or PWM bidirectional
  • Several diagnostic and protection functions
  • Adjustable window watchdog
  • TJunc peak = +170°C


  • LIN2.x or LIN1.3 relay nodes

Ordering Information

  • Samples
    Part No.FeaturesPackageOrder No.
    E523.02LIN 2.x or PWM for 2 half bridgesQFN44L7E52302C39B
    E523.02LIN 2.x or PWM for 2 half bridgesQSOP44E52302C35E
    E523.12PWM for 2 half bridgesQFN44L7E52312C39B
    E523.12PWM for 2 half bridgesQSOP44E52312C35E


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Application Diagram

LIN2.x Relay Node SBC  for 4/3 Relays


*Plug & Play Chip with defined functionality | no controller programming necessary
*SoC System-on-a-Chip | with integrated microcontroller
*SBC System-Basic-Chip | with Voltage Regulator Reset, Watchdog, physical Interface
*Driver IC Driver Chip without SBC or SoC features