ISL9241HRTZ-T7A - INTERSIL

FN8945 Rev.4.03 Page 1 of 1

Sep 3, 2020

FN8945

Rev.4.03

Sep 3, 2020

ISL9241

Buck-Boost Configurable Battery Charger with SMBus Interface and USB

Power Delivery

Data Short

To request the full datasheet, visit the ISL9241 product page.

The ISL9241 is a digitally configurable buck-boost

battery charger that can support both Narrow Voltage

Direct Charging (NVDC) and Hybrid Power Buck Boost

(HPBB/Bypass) charging and switch between the modes

using firmware control. Bypass mode is also supported

using the firmware of the controller, which allows the

adapter to provide power directly to the system. The

ISL9241 provides charging functionality, system bus

regulation, and protection features using only NFETs for

tablet, Ultrabook, and notebook platforms. The advanced

Renesas R3™ technology provides a high, light-load

efficient Charging mode. The ISL9241 takes input power

from a wide range of DC power sources (such as

conventional AC/DC charger adapters, USB Type-C

Power ports, and travel adapters) and safely charges

battery packs with up to 4-series cell Li-ion batteries.

The system power can be provided from the adapter,

battery, or a combination of both. The reconfigurable

internal registers of the charger allow the use of a smaller

inductor for the HPBB mode to achieve higher

efficiencies across multiple power levels. The ISL9241

can operate with only a battery, only an adapter, or both

connected. For Intel IMVP compliant systems, the

ISL9241 includes System Power monitor (PSYS)

functionality, which provides an analog signal

representing total platform power. The PSYS output

connects to a wide range of IMVP core regulators to

provide an IMVP compliant power domain function. The

ISL9241 supports reverse buck, boost, or buck-boost

operation to the adapter port (OTG mode) from 2- to

4-cell batteries. This allows configurations to support

USB-C Power Delivery (PD) output for Programmable

Power Supply (PPS) ports. The ISL9241 serial

communication uses SMBus/I2C, which allows

programming of many key parameters to deliver a

customized solution.

Features

• Buck-boost NVDC or hybrid power (turbo boost)

charger for 2-, 3-, or 4-cell Li-ion batteries using all

NFET transistors

• Input voltage range: 3.9V to 23.4V (no dead zone)

• System/battery output voltage: 3.9V to 18.304V

• Bypass mode supported to connect system to adapter

• Autonomous charging option (automatic end of

charging)

• Adapter current and battery current monitor

(AMON/BMON)

• PROCHOT# open-drain output, IMVP compliant

• System power monitor PSYS output, IMVP8/9

compliant

• Internal 8-bit ADC for monitoring key parameters

• USB-C PD Fast Role Swap support and PPS support

• Independent compensation pins for forward and

reverse operation (OTG) modes

• Supports supplemental power (Intel VMIN active

protection)

• Battery Ship mode: IC ultra-low power state

• Supports JEITA compliance using an NTC

• 4x4 32 Ld TQFN package

Applications

• 2- to 4-cell tablets, notebooks, power banks, and any

USB-C interface portable device requiring batteries

Related Literature

For a full list of related documents visit our website:

•ISL9241 device page

Figure 1. Typical Application

VSYS

VIN

BYPSG

BGATE

NGATE

CIN

CBAT

COUT

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(Rev.1.0 Mar 2020)