Single-Chip Battery Controllers Enable USB Power Delivery

Texas Instruments (TI) has introduced a pair of highly flexible, single-chip buck-boost battery charge controllers for one- to four-cell (1S to 4S) designs. The bq25703A and bq25700A synchronous charge controllers support efficient charging through USB Type-C and other USB ports in end equipment ranging from notebooks and tablets to power banks, drones and smart home applications. To learn more about the bq25703A and bq25700A.

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Supporting both I2C and SMBus interfaces, the bq25703Aand bq25700A feature a new advanced battery algorithm enabling full power output by adding intelligence to battery charging through maximum power point tracking technology. The unique algorithm, referred to as input current optimization (ICO), automatically detects the full capacity of input power to optimize current, while maintaining consistent system and charging current to ensure the utilization of maximum input power.

Key features and benefits

  • Input source flexibility: The device’s USB Power Delivery compatibility offers an input voltage range from 3.5 V to 24 V, which designers can use in multiple ports including USB 2.0, USB 3.0 and the newest standard, USB Type-C.
  • Wide USB On-the-Go (OTG) output compatibility: The new charge controllers support input-ready devices from 5 V to 20 V and adjustable output for USB OTG with programmable current regulation.
  • Compact configurations: TI’s new battery-charging algorithm and intelligent detection features enable the battery charge controllers to support wide input and output voltage ranges and more compact adaptor designs.
  • Seamless transition between different modes : The devices support 1S to 4S batteries and an efficient transition between buck and boost operation without any dead zone.

Designers can use the bq25700A evaluation module (EVM) to easily evaluate device features and performance and speed time to market. The bq25703A EVM and the bq25700A EVM  are available from the TI store and authorized distributors for US$149.00. Designers can use the WEBENCH Battery Charger Designer to calculate the efficiency of the battery charge controller.

The bq25703A and bq25700A charge controllers are now available through the TI store and authorized distributors. Offered in a 4-mm-by-4-mm, 32-pin quad flat no-lead (QFN) package, the controllers are priced at US$2.20 in 1,000-unit quantities.

Texas Instruments | www.ti.com

Promoter Group Announces USB 3.2 Spec Update

The USB 3.0 Promoter Group has announced the pending release of the USB 3.2 specification, an incremental update that defines multi-lane operation for new USB 3.2 hosts and devices, effectively doubling the bandwidth to extend existing USB Type-C cable performance. During the upcoming USB Developer Days 2017 event, the promoters will provide detailed technical training covering USB 3.2, fast charging advancements in USB Power Delivery, and other topics.

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While USB hosts and devices were originally designed as single-lane solutions, USB Type-C cables were designed to support multi-lane operation to ensure a path for scalable performance. New USB 3.2 hosts and devices can now be designed as multi-lane solutions, allowing for up to two lanes of 5 Gbps or two lanes of 10 Gbps operation. This enables platform developers to continue advancing USB products by effectively doubling the performance across existing cables. For example, a USB 3.2 host connected to a USB 3.2 storage device will now be capable of realizing over 2 GB/sec data transfer performance over an existing USB Type-C cable that is certified for SuperSpeed USB 10 Gbps.

Key characteristics of the USB 3.2 solution include:

– Two-lane operation using existing USB Type-C cables

– Continued use of existing SuperSpeed USB physical layer data rates and encoding techniques

– Minor update to hub specification to address increased performance and assure seamless transitions between single and two-lane operation

For users to obtain the full benefit of this performance increase, a new USB 3.2 host must be used with a new USB 3.2 device and the appropriate certified USB Type-C cable. This update is part of the USB performance roadmap and is specifically targeted to developers at this time. Branding and marketing guidelines will be established after the final specification is published. The USB 3.2 specification is now in a final draft review phase with a planned formal release in time for the USB Developer Days North America event in September 2017.

The USB 3.0 Promoter Group, comprised of Apple, Hewlett-Packard, Intel Corporation, Microsoft Corporation, Renesas Electronics, ST Microelectronics, and Texas Instruments, continues to develop the USB 3.x family of specifications to meet the market needs for increased functionality and performance in SuperSpeed USB solutions. Additionally, the USB 3.0 Promoter Group develops specification addendums (USB Power Delivery, USB Type-C, and others) to extend or adapt its specifications to support more platform types or use cases where adopting USB 3.x technology will be beneficial in delivering a more ubiquitous, richer user experience.

USB 3.0 Promoter Group | www.usb.org