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
- 4mm x 4mm 32 Ld TQFN package
- UL2367, IEC 62368-1: File No. E520109
Description
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.
Parameters
| Attributes | Value |
|---|---|
| Topology [Rail 1] | Hybrid Power Buck-Boost |
| Input Voltage (Min) (V) | 3.9 |
| Input Voltage (Max) (V) | 23.4 |
| Input Current Limit Accuracy (% (±)) | 2.25 |
| Battery Charge Voltage | 3.9 to 18.304 |
| Charging Voltage Accuracy (Max) (±%) | 0.5 |
| Battery Charge Voltage Adjustment | 8mV steps |
| Charge Current Limit Accuracy | ±3 |
| Trickle Charge Current Range | 64mA, 96mA, 128mA, 160mA, 192mA, 224mA, or 256mA |
| Switching Frequency Range (Typical) (kHz) | 600 - 1420 |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFN | 4.0 x 4.0 x 0.70 | 32 | 0.4 |
Application Block Diagrams
 | Highly Secure Drug Delivery System with NFC Authentication and Rich Connectivity Secure drug delivery system with precision dosing and safety features for proper medication and delivery. |
Additional Applications
- 2- to 4-cell tablets
- Notebooks
- Power banks
- Any USB-C interface portable device requiring batteries
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Renesas Boards & Kits
USB-C Buck-Boost Charger Evaluation Board
The ISL9241EVAL1Z evaluation board is designed to demonstrate the performance of the ISL9241. From the PROG pin to GND, the resistor can be used to program the default value numbers of the battery in series, the switching frequency, and the adapter current limit charging function. The default... Read More
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- Model-Based Development PlatformOffers electrochemical battery models designed to run on Renesas battery management solution platforms, enabling more accurate state estimation and improved overall battery performance.Provided By: BattGenie
