Overview

The RAA489110 is a digitally configurable buck-boost battery charger that supports Narrow Voltage Direct Charging (NVDC) and Hybrid Power Buck-Boost (HPBB/Bypass) charging; it switches between these modes using firmware control. Bypass mode is also supported using the firmware of the controller, allowing the adapter to provide power directly to the system. The RAA489110 provides charging functionality, system bus regulation, and protection features using only N-MOSFETs for tablet, Ultrabook, and notebook platforms. The advanced Renesas R3™ technology provides an efficient charging mode. The RAA489110 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 is provided by 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 RAA489110 can operate with only a battery, only an adapter, or both connected. For Intel IMVP-compliant systems, the RAA489110 includes a System Power monitor (PSYS) functionality that provides an analog signal representing total platform power. The PSYS output can connect to many different IMVP core regulators to provide an IMVP-compliant power domain function. The RAA489110 supports reverse buck, boost, or buck-boost operation to the adapter port (On-the-Go/OTG) mode) from 2- to 4-cell batteries, allowing configurations to support USB-C Power Delivery (PD) output for Programmable Power Supply (PPS) ports. The RAA489110 serial communication uses SMBus/IC, allowing for the programming of many key parameters to deliver a customized solution.

RAA489110 Typical Application Diagram
RAA489110 Typical Application Diagram
  • Buck-boost NVDC or hybrid power (turbo boost) charger for 2-, 3-, or 4-cell Li-ion batteries using all N-MOSFET transistors
  • Input voltage range: 3.9V to 30V (no dead zone)
  • System/Battery output voltage: 3.9V to 18.304V
  • Bypass mode supported to connect the system to the 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 programmable temperature profiles and JEITA compliance using an NTC
  • 4mm x 4mm 32-lead TQFN package, pin-to-pin compatible with the ISL9241 family of parts

Applications

  • 2- to 4-cell tablets
  • Notebooks
  • Power banks
  • DSLR
  • Any USB-C interface portable device requiring batteries

Documentation

= Featured Documentation
Type Title Date
Datasheet - Short-form
RAA489110 Short-Form Datasheet
PDF 148 KB
Datasheet
RAA489110 Datasheet
Log in to Download PDF 4.49 MB
2 items

Design & Development

RTKA489110DE0000BU Evaluation Board

RTKA489110DE0000BU

Evaluation
Learn More

USB-C Buck-Boost Charger Evaluation Board

The RTKA489110DE0000BU evaluation board demonstrates the performance of the RAA489110. From the PROG pin to GND, a resistor can be used to program the default value...

Featured Documents:
RTKA489110DE0000BU Evaluation Board Manual

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