6 Electronic Expansion Valve (EEV)

The Electronic Expansion Valve (EEV) is a device that utilizes electrical signals to control the flow of refrigerant. By adjusting the refrigerant flow, it enables precise control of the refrigeration system, thereby maintaining system pressure, achieving variable temperature heat exchange, and ensuring stable operation and efficient cooling of the air-conditioning system.

The DRV8847 is an integrated low-voltage dual H-bridge driver specifically designed to drive electronic expansion valves. It supports a wide input supply voltage range from 2.7V to 18V and boasts high output current capabilities: at an ambient temperature of 25°C, a single H-bridge can drive a load of 1A RMS, and in parallel mode, it can drive loads up to 2A RMS (under proper heat dissipation conditions). This allows the DRV8847 to drive motors or loads with higher power requirements. Effortless integration with controllers via a simple PWM interface facilitates precise motor control. A low-power sleep mode is also provided, consuming only 1.7µA of supply current in sleep mode at VVM=12V and TA=25°C, contributing to reduced energy consumption during no-load conditions. Built-in protection features ensure reliable motor operation and provide fault status indications, making it convenient for users to promptly detect and address faults.