New HT32F65C32F/C40F Motor MCU with a three-phase driver for BLDC applications by HOLTEK

Motor-MCU HT32F65C32F/C40F: BLDC motors have become very popular for many applications since they offer high efficiency and produce less EMI due to the absence of brushes and a commutator. However, they may have a more complex drive design compared to other types of motors and might require more electronic components for driving them. An answer is the new HT32F65C32F/C40F Motor MCU.

An BLDC motor driver plays an important role in simplifying the application’s design and reducing the costs of additional circuitry. When choosing a BLDC motor driver, it can be helpful to opt for one that includes some of the additional components you might need. For instance, HOLTEK offers a wide range of BLDC Motor Drivers for various applications. Some of them come with integrated 32-bit and 8-bit MCUs.

As a highlight, we now look more in detail on the new HT32F65C32F/C40F Motor MCU with a three-phase driver for BLDC applications.

At a glance: New HT32F65C32F/C40F Motor MCU

More than an Arm® Cortex®-M0+ MCU running with up to 60MHz main clock, both devices integrate an accurate 5 V output LDO. The 32 V 3-channel half-bridge driver with an isolated motor current sensing function is capable of driving three-phase BLDC motors directly due to the 6 integrated MOSFETs.

In addition, some protection features are integrated like under voltage lock-out (UVLO), output short circuit projection (OSP), over temperature protection (OTP) and a FAULT indication output signal to indicate the state of the protection features.

In both devices, a rich set of peripherals can be found. These include a Hardware Divider (DIV), ADC, OPA, CMP, I2C, USART, UART, SPI, MCTM, GPTM, SCTM, BFTM, CRC-16/32, LSTM, WDT, PDMA, SW-DP (Serial Wire Debug Port), among others.

All these features are packed into a single, compact chip available in either a 48-pin LQFP-EP or a 64-pin LQFP-EP – both 7x7mm – package for easy handling in production and reliable soldering.

HT32F65C32F or HT32F65C40F?

The HT32F65C32F differs from the HT32F65C40F in some details. The main differences include:

• HT32F65C32F: It features a 12-bit SAR ADC with a conversion rate of up to 2 Msps and supports up to 12 external analog input channels. Additionally, it includes one OPA, a Flash memory of 32 KB, and 4 KB of SRAM. It is suitable for 1-Shunt FOC and square wave sensor less applications.
• HT32F65C40F: It features a 12-bit SAR ADC with a conversion rate of up to 1 Msps and supports up to 8 external analog input channels for each ADC. Unlike the HT32F65C32F, it comes with two OPAs, a 64KB Flash memory, and 8KB of SRAM. It is suitable for 2-Shunt FOC applications, such as floor fans that require extremely quiet operation.

Other Applications

Both motor drivers are suitable for various applications using BLDC motors. These include

Why HOLTEK?

Holtek is a Taiwan-based semiconductor manufacturer established in 1998. Holtek aims to provide the electronic market with a highly competitive range of MCU and peripheral ICs and solutions. These find diverse applications in wireless technology, healthcare, automotive, measurement, power products, and more.

With the Motor-MCU HT32F65C32F/C40F you found the perfect solution for your application and would like to get more information? Or are you unsure about what to choose and would prefer to receive some advice from us? Please get in contact with us directly or send us your request here: