Reference Design: High Power Digital Inrush Current Controller (IXRD1002)

The High Power Digital Inrush Current Controller reference design extends IXYS' Digital Power Control technology to high current levels and introduces high current MOSFETs with current mirror sensors. High power digital inrush current control is based on Zilog’s 8-bit Z8F3281 microcontroller, a member of the Z8 Encore! XP F6482 Series of MCUs, and IXYS power transistors and rectifiers.

 

This reference design uses high-current IXYS transistors and rectifiers. The capacitor is charged according to a time-dependent pulse train. Pulses are designed to provide substantially equal voltage increment applied to the capacitor to maintain peak charging current at approximately the same value at each cycle. The number of cycles depends on the capacitor value and limitations to charge current. For higher load current, the capacitor value is larger, to provide the desired amplitude of ripples; therefore, pre-charge may be longer to maintain the charge current within limits. This reference design is suitable for load currents up to 10A. The load current may be substantially increased, considering that the MOSFETs used are rated at 120A DC and a serial sensor resistor is not present. The main components to be changed include a bridge rectifier, an inductor with the appropriate current rating, and a current mirror sensor resistor.

 

Features:
 
  • Input voltage range from 80 V to 240 V RMS
  • Steady load current up to 10 A
  • Programmable overload protection
  • Power Good status signal High endurance
  • Not sensitive to power outage or brownout
  • Not sensitive to ambient temperature variations
  • Voltage ripples 12% at 10 A load current and output capacitance of 3000 μF

 

The High Power Digital Inrush Current Controller reference design is relevant for high power loads with tens of amperes of current at normal operation. It allows users to optimize performance, maximize efficiency across the load range, and reduce the design time to market. IXYS power components handle the pre-charge of load capacitors at these values, while limiting inrush current to controlled values.

 

Start developing your Power Management application today!  Buy the High Power Digital Inrush Current Controller (Product ID #RD10042) from the Zilog Store.

 

 



Associated Documentation
Doc ID Title Doc Type
IXRD1002 High Power Digital Inrush Current Controller Reference Design Reference Design
IXRD1002-SC01 Source Code for the High Power Digital Inrush Current Controller Reference Design Source Code
Related Documentation
Doc ID Title Doc Type
IXRD1001 Digital Inrush Current Controller Reference Design Reference Design
IXRD1001-SC01 Source Code for the Digital Inrush Current Controller Reference Design Source Code
 
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