In recent years, there has been a growing trend toward using IPM (Individual Mass Processing) motors instead of SPM (Single Mass Processing) motors for three-phase BLDC (Blind-Mode DC) motors to achieve low cost, high performance, and high torque. Typical applications include household appliances such as air conditioners and air purifiers, as well as a wide range of industrial equipment. However, IPM motors are prone to vibration and noise, so there is a high demand for motor controllers that reduce noise and improve control efficiency.

The newly launched devices incorporate a high-resolution sine wave drive and support sine wave starting, which helps reduce vibration and noise. Furthermore, depending on the motor's characteristics and application, various speed settings can be programmed into the integrated non-volatile memory (NVM) via the serial peripheral interface (SPI). This capability enables highly efficient motor control by adjusting parameters such as the lead angle.

A key difference between the two devices is that the TC78B043FNG's NVM comes pre-programmed with the initial speed profile settings for common motors. This eliminates the need for manual programming or configuration before use, speeding up development time. Additionally, the TC78B043FNG has four terminals: FGC, LATYPE, LAOFS, and LA. The voltage settings on these terminals also allow for more granular adjustment of motor control parameters in the NVM without the SPI interface, such as motor lead angle control.

These motor controllers, which operate on a supply voltage between 6 V and 23 V, function over a wide temperature range, from -40 °C to +115 °C. They also feature thermal shutdown, undervoltage lockout, current limiting, overcurrent detection, and lockout protection. Both devices include integrated 5 V regulators, providing a stable power supply for external components such as Hall effect sensors or logic circuits, thus reducing the need for an additional voltage regulator in the system design.

The TC78B043FNG is housed in the popular HTSSOP28 package (6.3 mm x 9.9 mm), which simplifies board mounting thanks to its pin package. On the other hand, the TC78B043FTG comes in a compact, lead-free WQFN20 package (3.0 x 3.0 mm), enabling circuit board miniaturization and mounting in confined spaces.