Power & Power Management

Overview

Description

The ISL9237 is a buck-boost Narrow Output Voltage DC (NVDC) charger utilizing Intersil’s advanced R3™ Technology to provide high light-load efficiency, fast transient response and seamless DCM/CCM transitions for a variety of mobile and industrial applications. In Charge mode, the ISL9237 takes input power from a wide range of DC power sources (conventional AC/DC charger adapters, USB PD ports, travel adapters, etc. ) and safely charges battery packs with up to 3 cells in a series configuration. ISL9237 supports On-the-Go (OTG) function for 2- and 3-cell battery applications. When OTG function is enabled, the ISL9237 operates in the reverse Buck mode to provide 5V at the USB port. As a NVDC topology charger, it also regulates the system output to a narrow DC range for stable system bus voltage. The system power can be provided from the adapter, battery or a combination of both. The ISL9237 can operate with only a battery, only an adapter or both connected. For Intel IMVP8 compliant systems, the ISL9237 includes PSYS functionality, which provides an analog signal representing total platform power. The PSYS output will connect to a wide range of Intersil IMVP8 core regulators to provide an IMVP8 compliant power domain function. The ISL9237 has serial communication via SMBus/I2C that allows programming of many critical parameters to deliver a customized solution. These programming parameters include, but are not limited to: Adapter current limit, charger current limit, system voltage setting and trickle charging current limit.

Features

  • Buck-boost NVDC charger for 1-, 2- or 3-cell Li-ion batteries
  • Input voltage range 3.2V to 23.4V (no dead zone)
  • System output voltage 2.4V to 13.824V
  • System power monitor PSYS output, IMVP-8 compliant
  • Up to 1MHz switching frequency
  • LDO output for charger VDD
  • Adapter current monitor (AMON)
  • Battery discharging current monitor (BMON)
  • PROCHOT# open-drain output, IMVP-8 compliant
  • Allows trickle charging of depleted battery
  • Optional ASGATE FET control
  • Ideal diode control in Turbo mode
  • Supports OTG function for 2- and 3-cell batteries
  • SMBus and auto-increment I2C compatible
  • Two-level adapter current limit available
  • Pb-free (RoHS compliant)
  • Package 4x4 32 Ld QFN

Documentation

Design & Development

Boards & Kits

Boards & Kits

Models

Support

Videos & Training

ISL9238, ISL9237 USB Type-C™ Buck-Boost Battery Chargers

Introducing the industry's first buck-boost battery charger that supports USB Type-C™ connector. Single-chip ISL9237 reduces BOM costs up to 40%, extends battery life for ultrabooks, tablets and power banks.

Transcript

The USB Type-CTM is a next generation industry standard that allows charging, data transfer, and video, all in one simple connector. It can deliver up to 20V or 100W over a single cable: tailored to fit mobile devices, yet robust enough for laptops and tablets. It features reversible plug orientation and cable direction, so it will no longer matter which end of the cable or which side of the connector you plug in. It is truly all-in-one connectivity standards for tablets, notebooks, or smartphones. The USB 3.1 compliant ISL9237 joins the emerging USB Type-C ecosystem as the first battery charger capable of providing buck mode, buck-boost mode, and boost mode for 1 to 3-cell lithium-ion batteries.

The single-chip ISL9237 replaces competitive buck and boost two-chip charger solutions, eliminating a charger IC and inductor, to reduce customer bill of material costs by up to 40%. It also supports USB On-The-Go (OTG) with a 5V ultra-reverse buck mode, and reduces traditional two-stage charging to a single stage buck-boost for improved efficiency. In charging mode, the ISL9237 takes input power from a wide range of DC power sources: AC/DC charger adaptors, USB power delivery ports and any travel adapter to charge battery packs with up to three series cell lithium-ion batteries.

The ISL9237 can also operate connected to only a battery, an adapter or both. The ISL9237's key features include: input voltage range of 3.2V to 23.4V, system output voltage of 2.4V to 13.1824V, up to 1MHz operation allows smaller, lower cost inductors, and reduces acoustic noise in DCM mode.

The ISL9237 battery charger is the latest member of Intersil's family of mobile computing power management solutions, which include the ISL95852, Vcore PMIC, and the ISL95908 peripheral PMIC. These products power IMVP8 compliant systems using Intel's sixth generation core processors. For more information about the ISL9237 buck-boost charger IC, please visit the ISL9237 product page.