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Highly Integrated USB-C Buck Charger Reduces Size by 30 Percent
Maxim Integrated’s MAX77860 is said to be the industry’s first highly integrated USB-C charger that reduces complexity and simplifies software development for a wide range of consumer electronic devices, including power banks, medical devices, charging cradles, portable speakers, gaming devices, and more. Photo courtesy of Maxim Integrated Products, Inc. / PR Newswire.
Maxim Integrated Products’ MAX77860 is reported to reduce complexity and simplify software development
SAN JOSE, Calif.–The MAX77860 3A switch-mode charger from Maxim Integrated Products, Inc., is reported to provide designers of portable Li-ion battery-powered electronics with a simplified and more flexible way to add a USB Type-C (USB-C) charging system to their products.
Maxim said in a press release that the USB-C buck charger provides the industry’s first integrated USB-C port controller and charger to eliminate the need for a separate host controller, simplify software development, and reduce overall bill-of-materials (BOM) costs for applications that include financial point-of-sale terminals, power banks, industrial computers, scanners, radios, medical devices, charging cradles, portable speakers, and game players.
Maxim Integrated (https://www.maximintegrated.com) aims to develop innovative analog and mixed-signal products and technologies to make systems smaller and smarter, with enhanced security and increased energy efficiency. In doing so, the company said that it is empowering design innovation for customers in the automotive, industrial, healthcare, mobile consumer, and cloud data center markets.
The company describes the MAX77860 as the industry’s first highly integrated USB-C charger that reduces complexity and simplifies software development for a wide range of consumer electronic devices.
A wide range of consumer electronic devices are migrating to USB-C interfaces to support rapidly advancing communication and battery-charging capabilities, as well as smaller design size. In current designs, the host microprocessor is needed to detect the current level and configure the charger’s input current limit. Although PCs, laptops, and cell phones have driven early adoption, USB-C adoption rates are expected to grow by 8.5 percent per year through 2020, as a result of usage in other classes of portable devices, according to IDTechEx.
To reduce design size and simplify the system hardware and software design, the MAX77860 integrates USB-C configuration channel (CC) port detection and a battery charger for 15W applications. These integrated functions are said to allow battery charging at the fastest rate possible under the USB-C specification and contribute to 30 percent smaller design size, while also simplifying software development.
The CC pin detection feature also shortens the design effort by eliminating the need to support end-to-end USB port connection and allowing charging to start automatically, Maxim said in the release.
The highly integrated MAX77860 eliminates a separate port controller and many discrete components. It reduces the size of an inductor and a capacitor due to a high switching frequency of 2MHz/4MHz, resulting in a device that is 30 percent smaller than the closest competitive device, the company said. This high level of integration also reduces overall BOM costs.
“The MAX77860 dramatically reduces system complexity by integrating the charger, the power path, the low-dropout regulator, the ADC and the USB-C CC detection in a small 3.9mm x 4.0mm package,” said Perry Tsao, executive director, Mobile Solutions Business Unit at Maxim Integrated, in the release. “This level of integration simplifies the design, enabling the delivery of more power and more functionality in minimal printed circuit board space.”
Other key advantages are reported to include high efficiency and design flexibility. The buck reduces heat dissipation with more than 93 percent efficiency and up to 3A charging capability.
“The new MAX77860 from Maxim provides real advantages to design engineers working in the growing internet of things market,” said Kimberly Majkowski, global product manager, Power Management ICs at Premier Farnell. “It reduces cost and design time while delivering super-fast battery-charging capabilities demanded by today’s consumers.”
At the same time, backward compatibility allows designs to work with both USB-C and legacy BC1.2 or proprietary adapters. Integrated analog-to-digital converter (ADC) frees up resources in the microcontroller, while providing accurate voltage and current measurements, the company said.
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