The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 15, 2024
Filed:
Jan. 21, 2021
Maxim Integrated Products, Inc., San Jose, CA (US);
Bernhard Dwersteg, Rellingen, DE;
Maxim Integrated Products, Inc., San Jose, CA (US);
Abstract
Described is a method and a circuit arrangement for controlling a stepper motor in a voltage-controlled or voltage-regulated operating mode, having a bridge circuit provided for a motor coil (A) with semiconductor switches (HS, HS, LS, LS) for applying a first and a second PWM voltage (U(LA), U(LA)) having opposite polarity to the motor coil (A) and having a charge pump for switching at least the high-side semiconductor switch (HS, HS) of the bridge circuit. Because the charge pump must wait for a blocking or dead time before a further semiconductor switch can be switched after switching a first semiconductor switch, the time interval between a rising edge of one of the two PWM voltages and a subsequent rising edge of the respective other PWM voltage is increased at least until the blocking or dead time of the charge pump has elapsed.