STMicroelectronics' first dual op amp for electric vehicle resolver

【Lansheng Technology Information】TSB582 is STMicroelectronics' first high-voltage and high-current dual operational amplifier with a small package. This dual op amp is used in resolvers for electric vehicles, or other applications with high power AC motors or brushless DC motors, to determine motor position and improve efficiency. Additionally, the size of this op amp and its pin compatibility with other op amps make it an excellent general-purpose device for piezo actuators.

Why are resolvers so important in electric vehicles?

Accuracy of Motor Control Algorithms

A resolver uses a primary winding in the rotor. In addition to this reference coil, there are two secondary windings in the stator, placed at 90° to each other. One of the windings is called the sine winding because the system reports its sine amplitude, while the other is the cosine winding. In simple terms, alternating current passes through the primary coil, and as it moves, its electromagnetic field excites the secondary winding. By measuring the change in current in each winding, the sine and cosine functions can be obtained. The program can then apply the arctangent function through the sine and cosine values to obtain the precise angle of the rotor.

Resolvers and the popularization of electric vehicles

Another important advantage of resolvers is their durability. The TSB582 is equipped with an output current limiter as well as short-circuit and over-temperature protection to help handle more severe conditions. For example, with a thermal safety feature, the device automatically shuts down the output power stage to allow it to cool down. Once the temperature drops below a certain level, it will restart. Engineers don't have to worry about adding safety measures, just take advantage of them when planning for extreme conditions. STMicroelectronics data sheets even include PCB layout recommendations and application examples to help designers get started.

Lansheng Technology Limited, which is a spot stock distributor of many well-known brands, we have price advantage of the first-hand spot channel, and have technical supports. 

Our main brands: STMicroelectronics, Toshiba, Microchip, Vishay, Marvell, ON Semiconductor, AOS, DIODES, Murata, Samsung, Hyundai/Hynix, Xilinx, Micron, Infinone, Texas Instruments, ADI, Maxim Integrated, NXP, etc

To learn more about our products, services, and capabilities, please visit our website at http://www.lanshengic.com