TDK Embedded Controller HVC 4420F for Automotive Applications

The HVC 4420F is a product designed to drive small brushed, stepper or brushless motors, and it meets the latest requirements for diagnostic functions for smart actuators in modern cars. This article provides easy-to-understand information about the TDK embedded controller HVC 4420F that may be helpful to you.

Product Description

The HVC 4220F is designed to drive small brushed, stepper or brushless motors. The product meets the latest requirements of modern cars for smart actuators to provide diagnostic functions.

64 KB Flash and 4 KB SRAM can meet the increased functionality and diagnostics requirements of OEMs. Currently, OEMs take different approaches and methods to achieve diagnostics. This includes sensor data fusion strategies, actuator status and result diagnostics. To ensure the required data analysis, conventional software that can activate the underlying hardware diagnostic functions must be implemented and must meet the OEM's framework for proper integration. With a large memory and embedded diagnostic components, the HVC 4420F provides storage capabilities and can implement diagnostic functions in the unique environment of smart actuators.

The HVC 4420F is a member of the Micronas High Voltage Controller (HVC) family for smart actuators. The HVC products combine an ARM® standard microcontroller core with a wide range of additional functions to enable compact and cost-effective system designs specifically for automotive and beyond applications. Powered by a 32-bit CPU (ARM® Cortex®-M3) with 64 kB Flash, the HVC 4420F includes timers/counters, interrupt controller, multi-frequency ADC, SPI and enhanced PWM with diagnostics, which is important for implementing safety-related applications. An advanced LIN UART, LIN 2.x transceiver, and voltage regulator are all directly connected to the board network for integrated integration. Multiple power management modes help reduce power consumption. The product integrates a variety of integrated digital and analog circuit elements, such as comparators with virtual starting point reference, current scaling and embedded programmable gain amplifiers, which are used to eliminate the need for many external components.

Figure 1: HVC4420 Block Diagram

Because it handles high voltages, the HVC 4420F supports complex motor control algorithms such as space vector modulation (SVM) for permanent magnet synchronous motors, six-step commutation with sensor feedback or sensorless control, and a variety of stepper configurations.

Figure 2: Sensor-Controlled Block/Six-Step Commutation or Sensor-Controlled Space Vector Modulation.
Motor currents driven by internal MOSFET bridge. For continuous motor currents up to 1000 mA.

Figure 3 : Stepper Motor Current Control. Motor currents driven by internal MOSFET bridge. 
For continuous motor currents up to 500 mA.

HVC 4420F can be equipped with production-ready and highly flexible parameter-adjustable firmware, mature communication, monitoring and power management functions and configuration tools. Based on this firmware, customers can quickly and effectively develop application software, optimize the combination of motor and control, and shorten the time to market.

main application

● Grille door

● Smart valves and pumps

● HVAC valve

Figure 4: HVC 4420F in-vehicle application

Main features and benefits

● Fully integrated

● Support OEM diagnosis

● Reusability and flexibility

Key data