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Product Features

  • Fully Programmable 150MHz Arm® Cortex-M4F®
  • Integrated 70V DC/DC Buck or SEPIC controller
  • 128kB FLASH
  • Integrated 70V/1.5A Gate Drivers
  • Integrated PGA (3 Differential, 4 Single-ended)
  • Integrated DACs and Comparators
  • UART, CAN, I2C and SPI serial interfaces
  • Extremely low total hibernate mode
  • Minimal external components
  • 6x6mm, 48-pin QFN

The PAC5523 belongs to Active-Semi’s Power Application Controller (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 PAC5523 integrates a high-performance, high-memory FLASH-based 150MHz Arm® Cortex-M4F®, Power Management , High-side and low-side Gate Drivers and Signal-Conditioning components in a single product.

The PAC5523 is optimized for high-performance battery-powered BLDC motor control applications up to 48V.

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 integrated 70V/1.5A high-side and 3 integrated 1.5A 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. Hardware-based cycle by cycle current limit
Lowest Standby Power 18µA Iq for standby-mode


Active-Semi’s PAC5523EVK1 evaluation kit is a complete hardware solution enabling users to evaluate the PAC5523 device, but also develop motor control applications revolving around the powerful and versatile 150MHz Arm® Cortex® -M4F based MCU. This evaluation kit is a motor controller and driver evaluation PCB, that uses PAC5523 Power Application Controller®.To aid in evaluation and application development the PAC5523EVK1 offers access to all of the PAC5523 device’s signals by means of a series of female header connectors.

The PAC5523EVK1 can be used with the include reference firmware for sensored BLDC, sensorless BEMF and sensorless FOC control. Each firmware suite includes a graphical user interface (GUI) that runs on a Windows platform for evaluation and debugging of the user application. The ET-COLINK-1 and ET-UARTISO-1 adapters can be used for FLASH programming using SWD and GUI communication using the UART on the PAC5523.


PAC5523EVK1 User Manual

PAC5523EVK1 Schematics, Layout, BOM, Gerber Files

PAC5523EVK1 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.


The ET-UARTSWD isolated communications and debugging interface unifies two modules into one. Previously, interfacing a PC Computer to any of Active-Semi’s PAC5xxx Evaluation Modules required one module to enable UART based serial communications and a second module to allow for in-system debugging and FLASH memory programing.

Download ET-UARTSWD User Manual

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

PAC5523 BLDC Application Firmware

Installer for the PAC5523 BLDC application firmware, which implements sensorless BEMF motor control on the PAC5523 device. 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: 2018-05-16

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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: v4.0.1

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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: v.1.0.0

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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).

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Support files for developing PAC55XX firmware with IAR Embedded Workbench for ARM
Eclipse with PAC ® support

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Installer for Eclipse and supporting plugins for development on the PAC ® family of devices.
Segger J-Flash/J-Link Support

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Support files to enable flashing the PAC55xx using Segger J-Flash via J-Link debuggers.