Chip Features Adopts current mode, center-aligned PWM modulation, and can handle both inductive and capacitive loads. SPWM carrier frequency 20KHz, suitable for high-power MOS tubes and IGBT tubes. Output voltage and output current are processed in real time for each PWM cycle, enabling precise tracking. Integrated synchronous zero-crossing signal output and configurable 0°/120° phase tracking, enabling three-phase inverter function through cascading. Supports multi-unit applications. Pin configurable functions: H-bridge left and right bridge arm interchangeable control; 4 selectable dead-time options: 300nS, 500nS, 1uS, 1.5uS; 2 selectable fixed sine wave frequencies: 50Hz, 60Hz; soft start on/off; Inverter protection functions: DC bus overvoltage and undervoltage protection; AC output undervoltage protection; output overload protection; Output overcurrent protection; PCB overtemperature protection and IGBT overtemperature protection; output short-circuit protection; Serial communication configurable parameters: 50Hz pure sine wave fixed frequency; 60Hz pure sine wave fixed frequency; AC output voltage; Temperature protection value; rated power protection value; rated current protection value; fault reset; Serial communication readable parameters: AC output voltage; AC output frequency; AC output power; AC output current; AC output PF value; DC bus voltage; fault code;

Chip Description

The EG8020 is a mixed analog-digital chip that uses current mode and center-aligned PWM modulation, specifically designed for inverter products.

This chip uses CMOS technology. Its main internal modules include an SPWM sine wave generator, dead-time control circuit, multiple feedback and protection processing circuits, and a UART serial communication module.

The EG8020 uses an LQFP48 package. Combined with two external EG1160 high-voltage MOS driver chips, it can achieve characteristics such as a no-load waveform distortion rate of less than 1.5%, a full-load waveform distortion rate of less than 3%, and high-precision output voltage, meeting the waveform requirements of the inverter industry.

The EG8020 has built-in comprehensive protection functions, providing protection against DC bus overvoltage and undervoltage, AC output undervoltage, overload alarm, overload protection indication, overcurrent protection indication, overtemperature protection indication, and short-circuit protection indication.

The EG8020 has a built-in UART serial communication function. Users can configure parameters and reset functions through the serial port. The inverter's operating status and related data can also be read through the serial port.

The EG8020 supports three-phase inverter functionality. Through AC zero-crossing signal output and synchronous phase signal input, transmitted via an optocoupler isolation circuit, a three-phase inverter with a 120-degree phase difference can be formed using a serial cascade method.