Description

The MAX22201/MAX22202/MAX22207 integrate one36V, 3.5A peak full bridge capable of driving one brushedDC motor. The full bridge features very low impedanceFETs with a typical RON (high side + low side) of 0.3Ω resultingin high driving efficiency. The peak current ratingof 3.5A is limited by the overcurrent protection threshold(OCP). The peak current is defined as the maximum currentthe driver can provide for short transients. The maximumRMS current is 2A and is typically limited by thermalconsiderations. The 2ARMS capability refers to a standardJEDEC 4-layer board at 25°C ambient temperature. Thereal operating maximum current depends on the applicationthermal characteristic (PCB ground planes, heatsinks, ventilation, etc.).The MAX22201/MAX22202/MAX22207 feature a non-dissipativeand accurate integrated current sensing (ICS) andan embedded internal current drive regulation (CDR) circuitto monitor the current through a motor coil and limitthe peak output current. When the motor current exceedsthe current limit threshold, the full bridge enters a decaymode for a fixed off time (tOFF). For brushed motor driveapplications, the current drive regulation guarantees safeand reliable operation of the driver under normal conditionsor during motor startup and stall conditions, and alsoreduces system power and supply bypassing requirements.A scaled copy of the internally sensed current isoutput to an external pin (ISEN). For more information onthese features, refer to the Detailed Description.All versions feature overcurrent protection (OCP), thermalshutdown (TSD), and undervoltage lockout (UVLO). Anopen-drain active-low fault indication pin ( active-low FAULT) is activatedevery time a fault condition is detected.The device is packaged into a tiny TDFN12 3mm x 3mmpackage. The small package footprint, the extremely highefficiency and the integrated accurate current sensingmake the MAX22201/MAX22202/MAX22207 an excellentchoice for space- and power-sensitive applications.ApplicationsBrushed DC Motor DriveLatched Valves and SolenoidsStepper Motor Drive (One Phase Only)