Trinamic Introduces High-Power Gate Driver for BLDC and PMSM Motor Control SolutionsApril 10, 2019 by Gary Elinoff
The TMC6200 integrates in-line current sensing for complete Field Oriented Control solutions for servo motors.
The TMC6200 high-voltage gate driver integrates in-line current sensing to implement complete Field Oriented Control solutions for BLDC and PMSM servo motors drawing up to 100 Amps.
The TMC6200 is a one-chip solution, enabling flexible designs that can be tuned to perfectly match the motors in nearly any application.
The TMC6200. Image courtesy Trinamic.
Featuring integrated in-line current sense amplifiers with programmable amplification, the device includes most everything needed except the sensing resistors and the MOSFETs to power and control brushless DC (BLDC) motors and Permanent Magnet Synchronous (PMSM) motors.
What are BLDC and PMSM Servo Motors?
In a BLDC, the rotor is a permanent magnet. The stator is composed of multiple coils arranged around the circumference of the rotor’s rotation. The stators are turned on and off in sequence, and the magnetic interaction between the rotor’s permanent magnet and the stator’s electromagnets nudges the rotor, in a step-by-step manner, to rotate.
A PMSM servo motor is similar, and in both cases the position of the rotor in relation to the stator must be ascertained, which is where devices such as the TMC6200 comes in.
TMC6200 in Action
The TMC6200 can implement the complete high-voltage section of a Field Oriented Control (FOC) drive system for 12V, 24V, or 48V PMSM motors drawing up to 100A. The image below illustrates the TMC6200 working in concert with the TMC4671.
Block Diagram of the TMC6200. Image courtesy Trinamic TMC6200 Datasheet.
Michael Randt, Founder and CEO of Trinamic, states, “The TMC6200 complements the TMC4671 hardware-based servo controller building blocks and offers programmable safety features like short detection and over-temperature thresholds, enabling robust and reliable designs using an off-the-shelf building block.”
Important Features and Benefits
- Coil current sense range (external MOSFETs): up to 100A 2 or 3-phase motors
- DC voltage range: 8V to 60V
- 3-phase motors up to 100A coil current (external MOSFETs)
- Programmable gate drive (0.5A / 1A / 1.5A)
- Full protection and diagnostics via SPI interface
- SPI & Stand-Alone operation
- Charge Pump for 100% Duty Cycle operation
- Optional BBM break-before-make logic for single line control
- Programmable Short and Overload current threshold and retry
- Programmable Control Interface with 3 line or 6 line drive
- Compact 9x9mm2 TQFP48 package
- Double Pin Distance for safe operation at high voltage
Getting Designs to Market Faster
In a paradigm typical of today’s electronics industry, the TMC6200 encompasses circuitry needed to implement functions needed in a wide range of separate but related designs, freeing the engineers from essentially redundant work while shortening BOMs, reducing costs, saving board space and increasing reliability.
TMC6200-EVAL. Image courtesy Trinamic TMC6200 Datasheet.
As described in the datasheet, the TMC6200-EVAL is available to help designers get up and running quickly.
What the Competition has on Offer
Given the popularity of BLDC and PMSM motors, it isn’t surprising that many manufacturers offer integrated semiconductor solutions for drive and control, optimized for a variety of operating environments. Here is just a small sampling from a huge wealth of possibilities.
The RAJ306000 is a motor control IC from Renesas for controlling three-phase brushless DC (BLDC) motors that are used in battery-operated applications, like power tools and drones, operating at 6V to 30V.
Allegro Microsystems’s A4964 is a BLDC motor controller designed specifically for automotive applications. It operates over a supply range of 5.5 to 50 V and over temperatures ranging from -40ºC to +150ºC.
Have you worked with BLDC or PMSM motors in your designs? What do you think of these new components? Let us know in the comments.