General Description
The AS8444 is a complete and fully protected PWM DC motor driver/controller, which could be implemented by interfacing a low cost 8-bit µP and a high-side N-channel power FET switch.

Key Features
- Programmable PWM DC Motor Driver / Controller with µP Interface (Three Wire Interface)
- Programmable Functions and Parameters for Motor Current, Voltage and Speed Regulation
- Single Voltage Supply in the range Vbat = 6.0 V to 30 V (Vbat,max = 40 V)
- Total Power Efficiency up to 96 %
- Low RF Emission within the whole frequency range due to an integrated special EMC compliant driver
- No EMC Filters required
- Driver fulfils EMC Level 5 (CISPR 25)
- Dynamically self-adjusting slew rate regulated switching technology
- Fully protected by programmable failure handling procedures via µP
- Fast Over Current and Over / Under Voltage Detection and Protection, Battery Voltage Monitoring
- External and On Chip Temperature Detection and Protection
- Motor Current and Speed Measurement with a shunt resistor and capability of trimming the chip for an external shunt value
- LIN Bus Interface
- Programmable Parameters:
    • EMC compliant Driver Functions
    • Over Current, Over / Under Voltage Threshold Values
    • Motor Failure Threshold Levels
    • Motor Current Measurement Range
    • Trimming for the current measurement shunt
    • PWM Frequency, Charge Pump Monitor
- Charge Pump to control high side drivers
- Integrated 5 V Power Supply for external components (µP, etc.)
- Standby and Wake-up capability
- Sleep / Wake-up Mode system controlled by the µP and the LIN Bus
- SOIC 28 Package

Applications
- Fan cooler
- Air conditioning
- Fuel pumps
- Water and oil pumps
- General purpose DC Motor Regulators