H108947C

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H108947C is a precision, open-loop, digitally-controlled, electronically commuted, permanent magnet motor driver. Developed and provided by Robert Bosch GmbH, the driver features a single-channel system for controlling brushless DC motors that are used widely in robotics, automation, and precision control systems.

The microcontroller-centric design of the H108947C enables the motor driver to be programmed and configured for various robotic, automation, and precision control systems. It includes a programmable AMR (Advanced Motor Register) that provides adjustable features such as current compensation, sensitivity, timing, polarity, and torque control. The H108947C also supports a wide range of motor control algorithms and features advanced analogue front-end circuitry and digital signal processing for optimal power efficiency.

Application Field

The H108947C is an ideal solution for robotics, automation, and precision control systems due to its high accuracy and performance capabilities. It is designed for use in applications that require precise motor control, such as those involving high torque, wide speed ranges, high precision, and fast acceleration and deceleration. Examples of such applications include industrial robots, medical device technology, welding and cutting machines, semiconductor manufacturing systems, and industrial printing systems.

Working Principle

The H108947C is based on the principle of an H-bridge circuit, which allows the motor driver to be configured either in low-side or high-side mode. This allows the user to optimize the driver for both single-ended as well as push-pull operation. The driver operates in a current-mode control with a minimum pulse-width modulation frequency of 20 kHz and a resolution of 8 bits, guaranteeing motor control accuracy.

The driver is capable of delivering continuous currents of up to 20 A and peak currents of up to 40 A. It is designed for use with brushless DC motors that are powered using DC battery, battery management systems, or AC mains with voltage levels ranging from 5 V to 60 V. The driver allows for current sensing in each of its four channels, which ensures peak power efficiency.

The H108947C is built using a modular design with an in-line communication interface and built-in protection features such as over-voltage protection, thermal shut-off, and soft start. The driver is programmed and configured using the dedicated software, and includes communication protocols like SPI, I2C, and CAN. The driver also includes an adjustable frequency current generator for advanced motion control.

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