Motor Control _ Relay Driver

E520.02/08 (*Driver IC) | 12/8x Low-Side Relay driver with constant holding current

Description

The Elmos Driver ICs E520.02/08 control twelve/eight lowside switched relays. The ICs autonomously generate a constant relay holding current in a wide supply voltage range. A special circuit generates a PWM duty-cycle which automatically compensates changes in the supply voltage. So, there is no need for an external controller to observe the supply voltage and adapt the PWM duty-cycle for a constant relay holding current.
The IC is configured and controlled over an SPI interface. All outputs are short circuit and over-temperature protected with error read back capability. Switch monitoring with control lamp combination with only 1 wire and output is possible. For fast time-to-market Elmos provides demo-boards as well as design-in support.

Features

  • 12 high current outputs (RDSON typ. 1.5Ω / IMAX = 350mA)
  • Low standby current (typically <1μA)
  • Serial interface (SPI) for direct μC interfacing
  • Short circuit / Open load detection, diagnosis
  • TJunc peak = +150°C

Applications

  • Relay Driver with automatically VBAT- dependent WM duty cycle generation
  • Low power dissipating relay boards

Ordering Information

  • Samples
    Part No.FeaturesPackageOrder No.
    E520.02control 12 low-side
    switched relays
    SOIC28E52002A05E
    E520.02control 12 low-side
    switched relays
    QFN32L5E52002A61C
    E520.08control 8 low-side
    switched relays
    QFN20L5E52008A62C
    E520.08control 8 low-side
    switched relays
    QFN32L5E52008A61C
    E520.08control 8 low-side
    switched relays
    SOIC20E52008A55E

     

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Application Diagram

12/8x Low-Side Relay driver with constant holding current

Documentation

*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