MAX22212

DC-Motor Driver with ICS and CDRout, IN1+IN2+EN (4A/36V)

(under construction)

The MAX22212 features an accurate current drive regulation (CDR) which can be used to limit the start-up current of a brushed DC motor or to control the phase current for stepper operation. The bridge output current is sensed by a non-dissipative integrated current sensing (ICS) and it is then compared with user configurable threshold (I_TRIP). When the bridge current exceeds the I_TRIP threshold, the device enforces the decay for a fixed OFF-time (t_OFF). Four different Decay methods are supported (Slow Decay, Fast Decay, and two Mixed Decay modes). The non-dissipative ICS eliminates bulky external power resistors which are normally required for this function resulting in a dramatic space and power saving compared with mainstream applications using external sense resistors.

The MAX22212 features OCP, thermal shutdown (TSD), and undervoltage lockout (UVLO) protection. An open-drain active low FAULT pin is activated every time a fault condition is detected. During TSD and UVLO events, the driver is three-stated until normal operations are restored.

Features and benefits

• Integrated Current Drive Regulation
  • ICS Eliminates Bulky External Resistors and Improves Efficiency
  • Current Drive Regulation Monitor Output Pins (CDRA, CDRB)
  • Four Decay Modes Supported (Slow Decay, Fast Decay, and two Mixed Decays)
  • Half Full Scale (HFS) Pin to Improve Current Control Accuracy in the Low Current Range
• Current Sense Output (Current Monitor)
• Fault Indicator Pin (FAULT)
• Low-Power Mode (Sleep Mode)
• Protections
  • OCP for Each Individual Channel
  • UVLO
  • TSD T_J = 165°C
• TQFN32 5×5 mm and TSSOP28 4,4×9,7 mm Package