Active-Semi Solutions for Sustainability
Chinese (Simplified)English

Product Features

  • Fully Programmable 50MHz Arm® Cortex® -M0
  • Integrated 600V DC/DC Flyback controller
  • Integrated 600V Gate Drivers (250mA/500mA)
  • Integrated PGA (3 Differential, 4 Single-ended)
  • Integrated DACs and Comparators
  • UART, I2C and SPI serial interfaces
  • Extremely low total hibernate mode
  • Minimal external component
  • 8x8mm, 43-pin QFN

The PAC5253 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 PAC5253 integrates a FLASH-based MCU, Power Management, High-side and low-side Gate Drivers and Signal-Conditioning components in a single product. The PAC5253 is optimized for AC-Powered BLDC or PMSM motor control applications such as AC-powered fans, white goods or compressors in a low pin-count package. The PAC5253 contains a 50MHz Arm® Cortex®-M0 with 32kB of FLASH that can be used to implement high-performance motor control and supervisory applications. The MCU also contains motor control peripherals such as 10b 1MSPS dual auto-sequencer ADC, PWM timers with hardware dead-time insertion, etc. The Multi-Mode Power Manager™ (MMPM) contains a Flyback DC/DC controller and power management components for powering the 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

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 Manager 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 integrated high-side and 6 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
Lowest standby power Allows 18µA Iq for standby-mode
8x8mm, 43-pin QFN package Small footprint for small form-factor applications

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

PAC52xx BLDC Application Firmware

Installer for the PAC52XX BLDC application firmware, which implements sensored BLDC and sensorless BEMF motor control on all members of the PAC52XX 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: v2.3.0

Download Now!

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

Download Now!

PAC52xx Software Development Kit

Installer for the PAC52XX Software Development Kit (SDK) that provides register level definitions and peripheral driver APIs for developing ARM M0 application firmware on all PAC52XX devices.  The PAC52XX SDK is a unified SDK that supports Keil µVision IDE, IAR Systems Embedded Workbench for ARM (EWARM) IDE, and GCC tool chains.

Version: v2.6.1

Download Now!

PAC52XX Example Code

Installer for the PAC52xx Example Code that provides a simple source code example for getting started with the following IDE projects: Keil MDK (µVision), IAR Systems Embedded Workbench for ARM (EWARM), and Eclipse.

Version: 2019-05-03

Download Now!

PAC52xx IDE Support

Development of application firmware for PAC52XX Arm® Cortex® M0 is made easy with standard integrated development environments (IDEs). Several of the most popular IDEs contain support for PAC52XX devices including Keil uVision, and IAR Systems Embedded Workbench for Arm®. Eclipse development is possible using J-Link by downloading and installing the “Eclipse with PAC support” package.

PAC52XX Keil IDE Guide
Version: 2018-08-21

Download Now!

Guide for installing Keil uVision for development of PAC52XX application firmware.
Keil PAC52xx .pack v1.0.9 to v2.0.0 upgrade
Version: 2018-02-22

Download Now!

Guide for upgrading the Keil uVision PAC52XX pack from v1.0.9 to v2.0.0.
PAC IAR Support
Version: 2019-07-31

Download Now!

PAC IAR Systems Embedded Workbench IDE installation guide and patches.
Eclipse with PAC support
Version: v1.1.0 2019-03-27

Download Now!

Installer for Eclipse and supporting plugins for development on the PAC family of devices.

RD5253SWP 64mm up to 60W Waterpump Motor Control


The RD5253SWP reference design shows how the PAC5253 can be used to implement a water pump application in a compact form-factor allowing the PCB to fit on the back of the motor.  This design is a 64mm diameter PCB that supports up to 60 Watts.

RD5253SWP Schematic, Layout. BOM and Gerber Files