Overview: This seminar will introduce a new form of control referred to as Emulated Current Mode (ECM) control, that retains all of the intrinsic performance and ease-of-use benefits found in conventional current mode control, with reduced noise susceptibility and high operating frequency capability. Following a review of the step-down buck regulator and conventional current mode control, the operation of Emulated Current Mode control will be introduced. A new family of Simple Switcher buck regulators utilizing emulated current mode control is presented. These new regulators allow the user the ability to optimize the solution size and performance. A detailed explanation and design procedure to select for loop compensation components is presented. Also, a method is shown to predict the junction temperatures and overall thermal performance of a buck regulator. Finally an inverting (positive input to negative output) Buck-Boost application is presented.
Length: 33 minutes
Published Date: January 2007
Topics covered in this online seminar include:
- Buck Regulator Basics
- Operation of Current Mode Control
- Operation of Emulated Current Mode Control
- New Family of Simple Switcher Regulators
- Thermal Considerations
- Loop Compensation Design
- Inverting Buck-Boost Application
 Presenter: Robert (Bob) Bell is the application engineering manager for the National Semiconductor design center located in Phoenix, Arizona. Products designed at the Phoenix design center include; next generation PWM power controllers, gate drivers, hotswap and load share controllers. Previous to joining National, Bob designed power converters for both military and spacecraft applications. Education: BSEE Fairleigh Dickinson University, Teaneck NJ |
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