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ISL9237 Buck-Boost Bettary Charger

 2016-04-13

【产品特性】

‧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
‧Adapter current monitor (AMON)
‧Battery discharging current monitor (BMON)
‧Supports OTG function for 2- and 3-cell batteries
‧SMBus and auto-increment I2C compatible

【产品应用】

‧Mobile devices with rechargeable batteries

【文字介绍】

The ISL9237 is a buck-boost Narrow Output Voltage DC (NVDC) charger. The ISL9237 provides the NVDC charging function, system bus regulation and protection features for tablet, ultra-book and notebook platforms. Intersil’s advanced R3™ Technology is used to provide high light-load efficiency, fast transient response and seamless DCM/CCM transitions.

In charging 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-series cell Li-ion batteries.

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 an 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.