Renesas Electronics announces industry’s first USB-C combo buck-boost battery charger for mobile computing systems

Renesas Electronics Corporation, a supplier of advanced semiconductor solutions, introduced the industry’s first USB-C buck-boost battery charger to support both Narrow Voltage Direct Charging (NVDC) and Hybrid Power Buck-Boost (HPBB) charging for notebooks, ultrabooks, tablets, and power banks using the reversible USB Type-C connector cable.

Through firmware control, the ISL9241 can switch between NVDC and HPBB modes, providing a low-cost and small solution size capable of efficiently processing a full range of power levels. It leverages Renesas’ advanced R3 modulation technology for superior light-load efficiency and ultra-fast transient response to extend battery run-time. The charger’s reconfigurable internal registers allow the use of a smaller inductor for HPBB mode to achieve higher efficiencies across multiple power levels.

The ISL9241 delivers charging, system bus regulation, and protection features using NFETs for highest efficiency and bill of material (BOM) cost optimisation. The charger can operate with only a battery, only an adapter, or both connected. It takes DC input power from conventional adapters, travel adapters, and USB Type-C power delivery (PD) ports, and safely charges battery packs with up to four-cell Li-ion series batteries.

In NVDC mode, the ISL9241 automatically selects the adapter or battery as the source for system power. NVDC operation also supports turbo mode by turning on the BGATE FET to limit adapter current at the adapter’s current limit set point. NVDC is the ISL9241’s initial startup state before the system controller’s firmware changes the configuration to HPBB. In higher power HPBB mode, the ISL9241 supports bypass, bypass plus charging, reverse turbo-boost mode, and reverse turbo-boost mode plus charging.

The ISL9241 provides 5V to 20V reverse buck, boost, or buck-boost operation to the adapter port (OTG mode). This allows configurations to support USB-C PD output for fast charging Programmable Power Supply (PPS) ports. Direct charging the battery can also be enabled by bypassing the ISL9241 in PPS mode. The ISL9241’s reconfigurable charging architecture also allows designers to use the charger for multiport configurations while remaining fully compliant with the USB PD3.0 standard. Several digital telemetry, fault monitoring and protection features are provided. In addition, the ISL9241 also features a supplemental power mode that allows the input bias capacitor to store energy and release it during high power demand.

“The ISL9241 combo NVDC and HPBB battery charger gives customers the highest level of flexibility along with optimised system performance and maximum efficiency,” said Andrew Cowell, vice president, Battery & Optical Systems Division, Renesas Electronics Corporation. “Mobile computing OEMs count on Renesas to consistently deliver power management innovations that help them differentiate their products with thinner form factors and longer battery life.”

The ISL9241 can be combined with the ISL95338 buck-boost voltage regulator, R9A02G011 USB PD controller or R9J02G012 USB PD controller, and RAJ240045 fuel gauge IC for a complete USB-C PD3.0 and battery charger solution.

Key Features of ISL9241
  • Buck-boost NVDC and HPBB charger for 2-, 3-, or 4-cell Li-ion batteries
  • Input voltage range of 3.9V to 23.4V (no dead-zone)
  • System/battery output voltage of 3.9V to 18.304V
  • Bypass mode supports system connection to adapter
  • Adapter current and battery current monitor (AMON/BMON)
  • Supports supplemental power (Intel V active protection)
  • Programmable autonomous charging, and end of charge timer to stop battery charging
  • Integrated 8-bit ADC enables system telemetry: temperature (PCB and junction), adapter current/voltage, battery charge/discharge current, and system bus voltage
  • Compliant with Intel PROCHOT# and PSYS for protection against battery voltage drop, adapter over-current, battery over-current and overheat
  • Allows trickle charging of depleted battery
  • SMBus/I2C allows programming of key parameters to deliver a customised solution
  • Battery ship mode keeps IC in ultra-low power state

Comment on this article below or via Twitter: @IoTNow_OR @jcIoTnow

RECENT ARTICLES

SiTime expands addressable market with its new precision timing solution for autonomous vehicles

Posted on: September 30, 2022

Santa Clara, United States. 27 September, 2022 – SiTime Corporation, a provider in precision timing, introduced a new automotive oscillator family, based on SiTime’s advanced MEMS technology. The new differential oscillators are 10x more resilient and ensure reliable operation of ADAS across extreme road conditions and temperatures. The launch of the new automotive oscillator, AEC-Q100 SiT9396/7,

Read more

Semtech’s LoRa devices featured in Kiwi Technology gas metering solution

Posted on: September 30, 2022

Camarillo, United States. 29 September, 2022 – Semtech Corporation, a global supplier of high performance analog and mixed-signal semiconductors and advanced algorithms, announced that Kiwi Technology, an advanced internet of things (IoT) turn-key solutions and data analytics provider, is using Semtech’s LoRa devices for its new third party class B network control unit (NCU) that connects gas meters

Read more
FEATURED IoT STORIES

9 IoT applications that will change everything

Posted on: September 1, 2021

Whether you are a future-minded CEO, tech-driven CEO or IT leader, you’ve come across the term IoT before. It’s often used alongside superlatives regarding how it will revolutionize the way you work, play, and live. But is it just another buzzword, or is it the as-promised technological holy grail? The truth is that Internet of

Read more

Which IoT Platform 2021? IoT Now Enterprise Buyers’ Guide

Posted on: August 30, 2021

There are several different parts in a complete IoT solution, all of which must work together to get the result needed, write IoT Now Enterprise Buyers’ Guide – Which IoT Platform 2021? authors Robin Duke-Woolley, the CEO and Bill Ingle, a senior analyst, at Beecham Research. Figure 1 shows these parts and, although not all

Read more

CAT-M1 vs NB-IoT – examining the real differences

Posted on: June 21, 2021

As industry players look to provide the next generation of IoT connectivity, two different standards have emerged under release 13 of 3GPP – CAT-M1 and NB-IoT.

Read more

IoT and home automation: What does the future hold?

Posted on: June 10, 2020

Once a dream, home automation using iot is slowly but steadily becoming a part of daily lives around the world. In fact, it is believed that the global market for smart home automation will reach $40 billion by 2020.

Read more

5 challenges still facing the Internet of Things

Posted on: June 3, 2020

The Internet of Things (IoT) has quickly become a huge part of how people live, communicate and do business. All around the world, web-enabled devices are turning our world into a more switched-on place to live.

Read more

What is IoT?

Posted on: July 7, 2019

What is IoT Data as a new oil IoT connectivity What is IoT video So what’s IoT? The phrase ‘Internet of Things’ (IoT) is officially everywhere. It constantly shows up in my Google news feed, the weekend tech supplements are waxing lyrical about it and the volume of marketing emails I receive advertising ‘smart, connected

Read more
IoT Newsletter

Join the IoT Now online community for FREE, to receive: Exclusive offers for entry to all the IoT events that matter, round the world

Free access to a huge selection of the latest IoT analyst reports and industry whitepapers

The latest IoT news, as it breaks, to your inbox