ISL9241

Buck-Boost Configurable Battery Charger with SMBus Interface and USB Power Delivery

Product Status: Mass Production

OVERVIEW

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.

KEY 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
  • 4 x 4 32 Ld TQFN package
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    Applications

  • 2- to 4-cell tablets, notebooks, power banks, and any USB-C interface portable device requiring batteries

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL9241
Basic Information
生产状态
Mass Production
输入电压最小值 (V)
3.9
输入电压最大值 (V)
23.4
电池充电电压 (V)
3.9 to 18.304
充电电压精度最大值 (%)
±0.5
电池充电电压调节 (%)
8mV steps
充电限流精度 (%)
±3
涓流充电限流精度 (%)
64mA, 96mA, 128mA, 160mA, 192mA, 224mA, or 256mA
自动电源选择
Yes
直流适配器检测
Yes
拓扑
R3 modulator
开关频率典型值 (kHz)
600 to 1420
最大占空比 (%)
100
听觉噪音
No
热关断 (°C)
150 °C
电池化学物品
Multi-Cell Li+/Polymer
资质级别
Standard
输入电压范围 (V)
3.9 to 23.4
CAN 采样
YES

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