E523.39: Very quiet running, low EMC emission - fully integrated stall and residual current detection

With the E523.39 Elmos presents a highly precise stepper motor driver. It meets the highest demands regarding smooth running, EMC emissions and error detection. The target application is, among others, headlight adjustment. A new video clip shows this application with an integrated E523.39 in a practical way.

Other applications include: Valves for heat management, HVAC flap control, cruise control or front grill adjustment. Especially in the field of thermal management for electric and hybrid vehicles, the demand for valves is increasing because the heat generated by the combustion engine, electric drive, battery and other electronic components must be effectively controlled. For such valves, the E523.39 is the optimal driver for the servomotor. Furthermore, the chip can also be used in industrial environments or for building automation.

With a supply voltage of 5V to 42V, the output stages of the E523.39 deliver a maximum current of either 400mA, 800mA or 1200mA. In each of the 3 modes the programmable motor current curves achieve a very precise current resolution of 8 bit.

The high smoothness of operation and at the same time very low EMC emission is achieved by the step resolution of up to 1/32 microstep as well as a wide range of setting options such as 8 PWM frequencies or 7 decay modes. In addition, there is the possibility to use a user defined waveform as an alternative to the pre-programmed sine waveform. This allows the E523.39 to be adapted even better to the requirements of the applications. The E523.39 requires a minimum number of external components, which contributes to a cost-efficient BOM. Even with very small capacitances at the motor outputs, an electrostatic discharge strength (EDS) of over ±8kV (HBM) can be achieved.

Further outstanding features of the E523.39 are the integrated measuring and diagnostic functions: For example, the complete stall detection is performed internally, i.e. no evaluations with external MCUs are required. The stall detection works extremely reliably even at low speeds, challenging environmental conditions and different types of transmissions. This enables the application to work with very precise position information.

In addition, there is a new, unique residual current detection system which detects even the smallest residual currents in the motor or wiring system. Many faults can be diagnosed preventively. This makes the E523.39 an ideal component in safety-relevant applications.

For applications where energy consumption is an important issue, the sensor technology of the E523.39 enables the implementation of an "Adaptive Holding Torque" and an "Adaptive Running Current". The consumption over lifetime can thus be reduced by up to 90%. The E523.39 therefore offers a unique opportunity to reduce the CO2 emissions of the associated vehicle components in combination with innovative diagnostic functions.

For more information please send an e-mail to sales@elmos.com with the subject "E523.39" or contact us by phone: + 49 231 7549 100.

Show cookie popup