Embedded Motor Controllers

Product OverviewHVC 4420F – Fully Integrated Embedded Motor Controller with Extended Memory for Automotive Applications

Motion SensorsThe HVC 4420F is designed for the drive of small brush-type, stepper, or brushless motors. It satisfies the latest needs of the automotive industry to provide diagnostics capability newly introduced in the field of smart actuators.This article clearly describes and explains information valuable for our customers related to the features of TDK's HVC 4420F of Embedded Motor Controllers.

Product Description

The HVC 4420F is designed for the drive of small brush-type, stepper, or brushless motors. It satisfies the latest needs of the automotive industry to provide diagnostics capability newly introduced in the field of smart actuators.

With 64 KB flash memory and 4 KB SRAM, the HVC 4420F is the answer for the OEMs' increased functional and diagnostic demands. Currently, OEMs use own ideas and approaches on diagnostics. This includes sensor data fusion strategy, actuator status and resulting activities. To ensure the required data analysis, software routines have to be implemented, which activate the underlying hardware diagnostic features, while respecting the OEMs' framework to ensure proper integration. Due to its larger memory and the built-in diagnostic feature set, the HVC 4420F offers the storage capacity and processing capability to execute these actions which are unique in the environment of smart actuators.

The HVC 4420F is part of the Micronas high-voltage controller family (HVC) for smart actuators. The HVC family combines an ARM® standard microcontroller core with a wide range of additional functions in order to enable particularly compact and cost-efficient system designs for use in automotive applications and beyond. Powered by a 32-bit CPU core (ARM® Cortex®-M3) with 64 kB flash memory, the HVC 4420F contains, amongst others, timers/counters, interrupt controllers, multichannel ADC, SPI, and enhanced PWMs with diagnosis functions, important for utilization in safety relevant applications. An advanced LIN UART with a LIN 2.x transceiver as well as voltage regulators to connect the device directly to the automotive board net (5.4 V…18 V) do round up the all-in-one approach. Several power management modes help reducing the current consumption. Various integrated digital and analog circuit units, such as comparators with virtual star point reference, current scaling and an embedded programmable gain amplifier allow users to minimize the number of external components.

Figure 1 : HVC4420 Block diagram
Figure 1 : HVC4420  Block diagram

Due to its high processing power, the HVC 4420F allows complex motor control algorithms such as Space Vector Modulation (SVM) for permanent magnet synchronous motors (PMSM), six-step commutation with sensor feedback or sensorless control, as well as various 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 2 : Sensor-Controlled Block/Six-Step Commutation or Sensor-Controlled Space Vector Modulation.<br>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.
Figure 3 : Stepper Motor Current Control. Motor currents driven by internal MOSFET bridge.<br>For continuous motor currents up to 500 mA.

The HVC 4420F optionally comes with production-ready and highly flexible, parameterizable firmware with sophisticated communication, monitoring and power management functions as well as a configuration tool. Customers can develop application software, based on the firmware, that is both efficient and effective and thus optimally design the combination of motor and control by gaining significant reduction in their time to market.

Main Applications

  • Grille shutter
  • Smart valves and pumps
  • HVAC flaps
Figure 4 : HVC 4420F Automotive Applications
Figure 4 : HVC 4420F Automotive Applications

Main Features and Benefits

  • Full integration
  • OEM diagnostic support
  • Re-usability and flexibility

Key data

Type HVC4420F
Package QFN40
Temperature Range Automotive Grade-1
Built-in µC ARM® Cortex®-M3
Drivability Special peak drive up to 1 A
Diagnostics Built-in support by hardware and software