GENERAL DESCRIPTION
The typical total RON (high side plus low side) is 0.25Ω (typ). Each half bridge can be individually PWM controlled by mean of two logic inputs (DIN_, EN_). The MAX22213 integrates non-dissipative current sensing, which eliminates the bulky external power resistors normally required for this function, resulting in dramatic space and power saving compared with mainstream applications based on an external sense resistor. A current proportional to the internally-sensed load current is output to the external current-monitor pins (ISEN_). By connecting an external resistor to these pins, a voltage proportional to the motor current is generated. The voltage drop across the external resistors can be input into the controller ADC whenever the control algorithm requires the current/torque information. The maximum output current per half H-bridge is IMAX = 3.8A and is limited by the overcurrent protection (OCP) circuit. This current can be driven for very short transients and aims to effectively drive small capacitive loads.
Analog Devices
