Trinamic Motion Control GmbH & Co. KG, now part of Maxim Integrated Products, Inc. has launched an integrated 3-phase MOSFET gate driver that simplifies design and improves the battery life of brushless direct current (DC) motor drives. The TMC6140-LA 3-phase MOSFET gate driver integrates all three bottom shunt amplifiers, as well as a switching regulator, to provide a complete motor drive solution with 30-percent improved power efficiency. It also simplifies design by reducing component count by half when compared to similar solutions, according to Trinamic.
(Source: Trinamic) Click for a larger image.
The TMC6140-LA operates over a wide voltage range, making it well-suited for servo motors, brushless motors, and permanent magnet synchronous motors. The three-phase gate driver provides pins to add a charge pump, statically stabilizing the gate voltages of external MOSFETs in three-phase motors with up to 100 A of coil current.
(Source: Trinamic)
Offered in a 36-pin quad-flat no-leads (QFN) package, the gate driver delivers 0.5-A or 1.0-A gate driver current for 5 to 30-VDC battery-powered applications, such as power tools where voltages can drop below 10 V. For functional safety, the device integrates current sense and diagnostics features. The integrated shunt amplifiers provide current sensing for status information, and an analog programmable short detection and diagnostic output reports the status to the host.
In addition, for applications at 15 V or lower, the switching regulator output can be used to stabilize the power supply, said Trinamic, which maintains the output signals to ensure consistent operation over an extended battery life.
The TMC6140-LA, priced at $2.68 (1000-up, FOB USA), is available from Trinamic authorized distributors. The TMC6140-EVAL evaluation board and TMC6140-EVAL-KIT evaluation kit with both bridge and driver evaluation boards are priced at $66 and $130, respectively.
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