LTC1773EMS#PBF

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The LTC1773EMS#PBF is a voltage regulator from the DC/DC Switching Controllers range of Power Management and Interface ICs (PMIC) produced by Linear Technology. This device is an Integrated Mega-Step Motor Speed Controller that combines the features of a switch-mode controller, a PWM chopper and an op-amp, affordinng an integrated solution for controlling the speed of two-phase bipolar series mototrs. As with most PMICs, the LTC1773EMS#PBF is delivered in a small package, with a pin-out that allows flexible, convenient designs while providing controls to assure they runp efficiently, quietly and safely in the application.

The LTC1773EMS#PBF\'s most important feature is its microstepping capability. It allows sub-step resolutions from 0.66° down to 0.0083°, providing fine, smooth motion of the motor shaft for superior precision and accuracy. Another attribute of the device is its over-temperature protection, which helps maintain a safe operating environment for the motor, prolonging its lifespan. Other features of the LTC1773EMS#PBF include a wide input voltage range, adjustable current limit and monitoring sections for the supply and output voltages.

In terms of its application field, the LTC1773EMS#PBF can be used in a wide range of motor-control applications, such as ink-jet printers, fluid-control pumps, medical equipment and other industrial automation systems. In addition, due to its small size and power efficiency, it is suitable for portable products, such as smart phones, tablets and other similar devices.

The working principle behind the LTC1773EMS#PBF is quite straightforward. It incorporates two comparators, one of which is used to detect the voltage across its motor. When the motor voltage exceeds a specified level, a signal is sent to the microcontroller, which then switches off the current to the motor for a certain time period. The time period for which the current is switched off is determined by the microcontroller, maximizing efficiency and protecting the motor from overheating.

In addition, the IC constantly monitors the output currents and can adjust them automatically according to the application\'s current requirements. The device\'s adjustable current limit thresholds also allow a better accuracy of the motor current and help to reduce the total power dissipation of the system, optimizing its efficiency of operation. Finally, the LTC1773EMS#PBF features an integrated charge pump circuit, which helps reduce the board area significantly.

In conclusion, the LTC1773EMS#PBF is an ideal solution for motor-speed control applications. It provides an integrated solution that combines the features of several components into a single device, making it highly efficient, reliable and cost-effective. Further, its PWM and microstepping capability make it suitable for precise applications, while its adjustable current limit and over-temperature protection features help reduce power dissipation and improve system efficiency. Together, these features make the LTC1773EMS#PBF an ideal choice for many motor-control applications.

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