Electronicdesign 8096 Tichipsetpromo
Electronicdesign 8096 Tichipsetpromo
Electronicdesign 8096 Tichipsetpromo
Electronicdesign 8096 Tichipsetpromo
Electronicdesign 8096 Tichipsetpromo

Chipset Controls Dead Time to Reduce MOSFET Failure Risk

May 21, 2015
A new power-management chipset from Texas Instruments exploits intelligent digital control and a body-diode sensing feature that optimizes secondary-side synchronous rectification in ac-dc and isolated dc-dc power supplies.

Accurately controlling dead time in synchronous rectifiers helps minimize power loss and risk of MOSFET failure. With that in mind, Texas Instruments incorporated intelligent digital control and a body-diode sensing feature into its latest chipset to optimize secondary-side synchronous rectification in ac-dc and isolated dc-dc power supplies. The chipset comprises the UCD3138A digital controller and UCD7138 low-side gate driver.

The controller/driver combo uses body-diode voltage information with digital control algorithms to optimize dead time and compensate for power-stage component variations without calibration or screening during mass production. Intelligent sensing adjusts timing for minimal diode conduction to boost efficiency and reliability while eliminating the traditional signal-to-noise ratio channels of MOSFET VDS_ON sensing devices.

The gate driver features an asymmetrical, rail-to-rail, 4-A source and 6-A sink peak-current drive to support load range of a few hundred watts to a kilowatt (for multiple paralleled FETs). Operation maintains high efficiency at frequencies up to 2 MHz, thanks to the controller’s hardware peripherals in addition to 14-ns propagation delays and fast rise/fall teams. A 3- by 3-mm QFN package helps conserve board space.

Sponsored Recommendations

Board-Mount DC/DC Converters in Medical Applications

March 27, 2024
AC/DC or board-mount DC/DC converters provide power for medical devices. This article explains why isolation might be needed and which safety standards apply.

Use Rugged Multiband Antennas to Solve the Mobile Connectivity Challenge

March 27, 2024
Selecting and using antennas for mobile applications requires attention to electrical, mechanical, and environmental characteristics: TE modules can help.

Out-of-the-box Cellular and Wi-Fi connectivity with AWS IoT ExpressLink

March 27, 2024
This demo shows how to enroll LTE-M and Wi-Fi evaluation boards with AWS IoT Core, set up a Connected Health Solution as well as AWS AT commands and AWS IoT ExpressLink security...

How to Quickly Leverage Bluetooth AoA and AoD for Indoor Logistics Tracking

March 27, 2024
Real-time asset tracking is an important aspect of Industry 4.0. Various technologies are available for deploying Real-Time Location.

Comments

To join the conversation, and become an exclusive member of Electronic Design, create an account today!