Active-Semi Solutions for Sustainability
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Product Features

  • Fully Programmable 32-bit MCU
  • Integrated 600V DC/DC N-CH Buck Controller
  • Integrated 600V Gate Drivers (250mA/500mA)
  • Integrated PGA (3 Differential, 4 Single-ended)
  • Integrated DACs and Comparators
  • UART, SPI, I2C and CAN Serial Interfaces
  • Extremely Low-Power Total Hibernate Mode
  • Minimal external component count
  • 10x10mm, 52-pin QFN


The PAC5556 belongs to Active-Semi’s Power Application Controller?五分快三计划?(PAC) family. The PAC family of products are highly-optimized SOC devices that can implement BLDC or PMSM programmable motor controller and driver in a single integrated IC. The PAC5556 integrates a FLASH-based high-performance MCU, Power Management, High-side and Low-side Gate Drivers and Signal-Conditioning components in a single product.

五分快三计划The PAC5556 is optimized for AC-Powered BLDC or PMSM motor control applications such as AC-powered fans, white goods or compressors. The PAC5556 also includes optimized hardware support and software libraries for the IEC/UL 60730 Class B Safety standard.

The PAC5556 contains a 150MHz Arm??Cortex?-M4F with 128kB of FLASH that can be used to implement high-performance motor control and supervisory applications. The MCU also contains motor control peripherals such as 12-bit 2.5 MSPS dual auto-sequencer ADC, PWM timers with hardware dead-time insertion, etc. The PAC5556 contains an integrated N-CH Buck DC/DC controller, a? 5V/200mA converter and multiple LDOs for system and power management components for he IC and other PCB system power supplies. The Application-Specific Power Drivers? provide integrated gate drivers for use with an external inverter. The Configurable Analog Front-End? (CAFE) provides signal-chain components such as differential and single-end amplifiers, comparators and DACs.

Advantages of our Intelligent Motor Control

High-Performance, high-memory programmable 32-bit MCU Allows implementation of high-performance advanced control algorithms such as Field Oriented Control (FOC), Sensorless BEMF, Sensored BLDC and serial communications protocols
Integrated Power Management Removes the need for an external DC/DC Controller. Provides 5V/200mA system supply for additional PCB peripherals. Integrates all power rails for MCU, FLASH, Analog and gate drivers
Integrated Gate Drivers 3 600V 250mA/500mA integrated high-side and 3 1A integrated low-side gate drivers for 3-phase inverters
Integrated Signal Chain Allows integrated current, voltage and temperature sensing and protection using integrated Differential and Single-ended Programmable-Gain Amplifiers, comparators and DACs. Cycle-by-cycle current limit without MCU intervention
Lowest Standby Power 18 μA Iq for standby-mode
IEC/UL60730 Class B Optimization Allows implementation of the IEC/UL60730 Class B standard without additional system cost for PCB components


Active-Semi’s PAC5556EVK1 development platform is a complete hardware solution enabling users not only to evaluate the PAC5556 device, but also develop power applications revolving around this powerful and versatile Arm? Cortex?-M4F based microcontroller. The module contains a PAC5556 Power Application Controller? MCU, and all the necessary circuitry to properly energize the MCU and its internal peripherals once power is applied.

To aid in the application development, the PAC5556EVK1 offers access to each and every one of the PAC5556 device’s signals by means of a series of male header connectors.

PAC5556EVK1 User Manual
PAC5556EVK1 Schematics, Layout, BOM, Gerber Files
PAC5556EVK1_Altium Project Files

Supporting Evaluation Tools

The ET-UARTSWD adapter is the preferred adapter for evaluation of PAC devices/firmware and?combines a USB to UART adapter with SWD debugger connector adaptation into a single board with isolation. The?ET-UARTISO-1 adapter provides only the USB to UART adapter with isolation for Active-Semi application GUI?communications.


Buy it at these partners


The ET-UARTISO-1 adapter is a USB to UART adapter for Active-Semi application GUI communications with the?PAC device UART, and can be used for evaluation and debugging of PAC applications.
Buy it at these partners

PAC5xxx Flash Programmer Tools

Active-Semi has partnered with Flash Programmer solution providers to support our Intelligent Motor Control PAC product families.
These proven tools are suitable for emerging and high volume product manufacturing.
Both package level (socketed) and board level Flash programming solutions are available.

Active-Semi will support other vendors familiar with Arm? Serial Wire Debug (SWD) protocol to add PAC product compatibility on their existing Flash programmer platforms.

For more details contact

PAC55xx BLDC Application Firmware

Installer for the PAC55xx BLDC application firmware, which implements sensored BLDC and sensorless BEMF motor control on all members of the PAC55xx family.? The installer contains example application source code, Windows graphical user interface (GUI), and documentation to allow the user to configure the system to work with their target motor.? Project files for IAR Systems Embedded Workbench for ARM (EWARM) and Keil uVision are included.

Version: v2.2.0 2019-09-10

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PAC FOC Application Firmware

Installer for the PAC FOC application firmware designed to show case motor control using sensorless Field Oriented Control (FOC) on all PAC devices.? The installer contains example FOC application source code, Windows graphical user interface (GUI), and documentation to allow the user to configure the system to work with their target motor.?? Project files for IAR Systems Embedded Workbench for Arm? (EWARM), Keil uVision and Eclipse are included. The FOC application provides a?configurable set of features to meet many different application requirements such as sensorless position/speed estimator, start-in-motion (SIM), three or single shunt operation, open phase detection (OPD), field weakening and others.

Version: v4.1.2

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PAC55XX Software Development Kit

Installer for the PAC55XX Software Development Kit (SDK) that provides register level definitions and peripheral driver APIs for developing ARM M4 application firmware on all PAC55XX devices. The PAC55XX SDK is a unified SDK that supports Keil μVision IDE, IAR Systems Embedded Workbench for ARM (EWARM) IDE, and GCC tool chains.

Version: v1.5.1

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PAC55XX Example Code

Installer for the PAC55xx Example Code that provides source code examples for using the PAC55xx peripherals. IDE projects are provided for Keil MDK (μVision), IAR Systems Embedded Workbench for ARM (EWARM), and Eclipse.

Version: v1.4.0

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PAC55xx IDE Support

Development of application firmware for PAC55XX ARM Cortex ? M4 is made easy with standard integrated development environments (IDEs). PAC55XX can be used with the most popular integrated IDEs including Keil MDK(uVision), IAR Systems Embedded Workbench for ARM, and Eclipse.


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Support files for developing PAC55XX firmware with Keil MDK (uVision).
PAC IAR Support
Version: 2019-07-31

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Support files for developing PAC firmware with IAR Embedded Workbench for ARM
Eclipse with PAC support
Version: v1.1.0 2019-03-27

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Installer for Eclipse and supporting plugins for development on the PAC family of devices.
Segger J-Link Support
Version: 2019-10-23

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PAC support files for Segger J-Link debuggers.