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Intersil introduces the industry's first buck-boost battery charger that supports USB Type-C™ connector

Intersil has introduced the industry's first buck-boost battery charger that supports two-way power delivery using the reversible USB Type-C™ connector. The single-chip ISL9237 Narrow VDC (NVDC) battery charger replaces competitive buck and boost two-chip charger solutions, eliminating a charger IC and inductor to reduce customer bill of materials (BOM) costs by up to 40%. The ISL9237 leverages Intersil's patented R3™ modulation technology for acoustic noise-free operation, excellent light load efficiency and ultra-fast transient response to extend battery run-time.

The USB 3.1-compliant ISL9237 joins the emerging USB-C™ ecosystem as the first battery charger capable of providing buck-mode, buck-boost-mode, and boost-mode for 1-to-3 cell Li-ion batteries. It also supports USB On-The-Go (OTG) with a 5Vout reverse buck-mode, and reduces traditional two-stage charging to a single-stage buck-boost for improved efficiency. The USB Type-C interface connection enables delivery of data, video and power up to 100W over a single cable.

In charging mode, the ISL9237 takes input power from a wide range of DC power sources -- AC/DC charger adapters, USB power delivery (PD) ports and any travel adapter to charge battery packs with up to 3-series cell Li-ion batteries. The ISL9237 can also operate connected to only a battery, an adapter, or both. The ISL9237's system turbo-mode helps the battery and charger adapter work together to supply the system load when it exceeds the adapter's capability. In turbo-mode, the ISL9237 quickly turns on the battery BGATE FET to deliver system power. In addition, the ISL9237's wide 5V to 20V input voltage capability helps boost the USB-C ecosystem to support new power bank products.

Free eval
  
Key Features
  • Buck-boost NVDC charger for 1-, 2-, or 3-cell Li-ion batteries
  • Input voltage range of 3.2V to 23.4V (no dead-zone)
  • System output voltage of 2.4V to 13.824V
  • Up to 1MHz operation allows use of smaller, lower cost inductors and automatically reduces switching frequency with no audible acoustic noise when charger is in DCM mode
  • ASGATE FET control: actively controls inrush current to prevent FET damage
  • LDO output for charger VDD
  • 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 programmable limit settings with adapter current monitor (AMON) and battery discharging current monitor (BMON)
  • Battery learn mode activated by SMBus control command, allows calibration of the battery fuel gauge)
  • Compact Package, 4x4 32 Lead QFN
Data

Typical application circuit diagram

Intersil Eval Board

The ISL9237 is housed in the compact 32 Lead 4x4 QFN package and has an operating temperature range of -10°C to +100°C.

Click on the video below to view a brief overview of the ISL9237 buck-boost battery charger

The ISL9237 is suitable for a wide range of applications where rechargeable batteries are the primary power source such as hand held instruments, rugged tablets/laptops, portable industrial equipment and portable environmental monitoring devices etc..

The ISL9237 is supported by the ISL9237EVAL2Z evaluation board which allowing engineers to accelerate the design process and bring products to market faster.

The ISL9237EVAL2Z provides all circuits that are required to evaluate the majority of the features of the ISL9237, such as adjustable output voltage, On-the-Go (OTG) mode, trickle charging mode for depleted battery, and system power monitor at buck, boost and buck-boost modes are available on the evaluation board.

Intersil Eval Board

Anglia are offering customers a FREE ISL9237EVAL2Z evaluation board and samples of ISL9237HRZ from Intersil, please fill in the form below to register your interest now.

To register for a FREE evaluation board and samples of the ISL9237 buck-boost charger from Intersil, please fill in the form below

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FREE samples for UK and Ireland customers only, subject to availability.

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