The REFWATERPUMP150W 12V reference design targets electrically driven water pumps with a nominal power level of 150 W operating from a 12 V supply. The design is based on the MOTIX™ TLE9954EQW40 System-on-Chip, which integrates an Arm® Cortex®-M23 microcontroller, a LIN transceiver, a gate driver, and power management blocks in a single device. This integration supports sensorless motor control using block commutation and Field-Oriented Control (FOC) algorithms without external position sensors.

The power stage uses OptiMOS™ 7 40 V MOSFETs, including the IAUCN04S7N024H in an SSO8 package and the IAUZN04S7N032 in an S3O8 package, optimized for low conduction losses and switching efficiency in automotive-style DC motor applications. The reference design includes validated hardware schematics and pre-tested control firmware, enabling evaluation of motor performance, efficiency, and control stability. It also supports software customization paths for advanced pump control strategies and system-level integration.

Features of REFWATERPUMP150W 12V Reference Design 

The REFWATERPUMP150W 12V reference design provides a compact motor control platform for electronically driven water pumps, combining integrated control, power, and communication blocks. Let’s go through its features in detail.

Targeted Architecture for 12 V Water Pump Systems

The REFWATERPUMP150W reference design is intended for 150 W water pump applications operating from a 12 V supply. It is built around the MOTIX TLE9954EQW40 System-on-Chip, which integrates an Arm Cortex-M23 CPU, a LIN transceiver, a bridge driver, and an internal power supply. This high level of integration enables sensorless motor operation while reducing external components, PCB area, and overall system complexity.

Motor Control and Power Stage Implementation

The design supports both block commutation and Field-Oriented Control (FOC) using pre-tested firmware, allowing evaluation of efficiency, torque control, and dynamic response. The power stage employs OptiMOS 7 40 V MOSFETs, including IAUCN04S7N024H (SSO8) and IAUZN04S7N032 (S3O8), selected for low conduction losses and suitability for automotive-style motor loads. This configuration supports thermal stability and predictable switching behavior.

Communication, Debug, and System Evaluation

A LIN interface is included for control and diagnostics, aligning with automotive and industrial pump communication requirements. An SWD debug port enables firmware development, testing, and parameter tuning. The reference design is supported by extensive documentation and evaluation tools, enabling detailed analysis of motor behavior, control algorithms, and system performance.

EMC, Thermal Design, and Scalability

The reference platform serves as a baseline for EMC compliance and thermal performance validation. Optimized BOM selection and reduced PCB size support compact implementations while maintaining scalability for customized control features. The architecture enables the adaptation of hardware and software to support advanced pump functions and application-specific requirements.

Sensorless Control and System Integration

The integrated SoC enables sensorless motor control by combining processing, gate driving, and power management in a single device. This eliminates the need for external position sensors, reducing wiring complexity and improving long-term system robustness in pump environments where moisture and vibration are present.

Development Workflow and Custom Software Paths

The reference design supports rapid firmware iteration through validated control stacks and structured software architecture. For applications requiring extended diagnostics, advanced control modes, or application-specific behavior, the platform allows integration of customized software layers and control logic without modifying the core hardware architecture.