Trinamic introduces smart driver ICs for battery-powered DC motors
TRINAMIC Motion Control Co., Ltd. announced the launch of the TMC7300, a low-voltage driver for one DC motor with a peak current of 2A or two DC motors with a peak current of 2.4A. The TMC7300 is powered by a single or dual lithium-ion battery or at least 2 AA batteries, making it ideal for battery-powered devices (such as IoT and handheld devices, printers, POS applications, toys, cameras, and mobile medical devices).
Figure 1: TMC7300-LA
Due to the integrated direct bridge, the chip can also be used to control solenoids, relays and other actuators. Despite its small form factor – only 3x3 mm in a QFN20 package, the TMC7300 uses integrated power MOSFETs and a fully integrated DC motor control logic to achieve high power density. Therefore, it can control speed and limit torque, or for torque control operations.
Hamburg-based company founder and CEO Michael Randt explained, "By launching a new family of driver ICs for battery-powered applications, we want to inspire innovation. We want to provide engineers around the world with the tools they need to develop new applications Tools and turn proven concepts into portable devices for consumers and professionals to inspire their imagination. "
For ease of use, the TMC7300 has a single-wire UART interface. It can control the direction, speed and torque of two DC motors at most. Combined with Trinamic's development environment (including open source hardware and software), the new chip enables rapid prototyping with lower overhead costs.
Protection and diagnostic functions support stable and reliable operation, including PWM control for smooth acceleration and deceleration, internal current limiters for protecting DC motors and power supplies, and mechanical load sensing. By using a sense resistor to achieve the required maximum current, the chip can disable the power amplifier stage and report an error through the interface or DIAG output.
TMC7300-LA, together with the breakthrough board TMC7300-BOB and evaluation board TMC7300-EVAL, will be available through Trinamic's distribution channels at the end of January 2020.
Features and advantages:
· Voltage range: 2 (1.8) ... 11V DC
· Can drive up to 2A DC motor or 2.4A DC motor
· Use 1 or 2 lithium-ion batteries or at least 2 AA batteries
· Single-wire UART with speed, torque and direction control
· Standby current consumption "50nA (typical)
· Low RDSon for LS170mΩ and HS170mΩ (typical)
· Comprehensive protection and diagnostics, including motor load feedback
· PWM control of LED
· Suitable for solenoid
· QFN20 package (3x3 mm)