Features
- Buck-boost charger for 2 to 7 cells up to 30V batteries
- Optional BFET
- Input voltage range: 3.9V to 30V (no dead zone)
- System output voltage: 2.4V to 30.8V
- Autonomous charging option (automatic completion of charging)
- Pass-through mode in a forward direction
- Adapter current and battery current monitor (AMON/BMON)
- Trickle charging of depleted battery
- Reverse buck, boost, and buck-boost operation from battery
- Battery Ship mode option
- 4×4 32 Ld TQFN package compatible with the ISL9238 and RAA489108 products
Description
The RAA489118 is a buck-boost charger that supports a 30V input and 30V battery. It provides charging and protection features for power tools, portable vacuums, battery-powered lawn mowers, and power banks, and provides additional system bus regulation for notebooks. It is compatible with any USB-C interface platform, including USB Power Delivery (USB PD) Extended Power Range (EPR). The advanced Renesas R3™ technology ensures highly efficient light-load operation and fast transient response.
In charging mode, the RAA489118 accepts input power from a wide range of DC power sources, such as conventional AC/DC charger adapters, USB PD ports, and travel adapters, safely charging battery packs with up to 7 serially connected cells up to 30V. The device can operate with only a battery, only an adapter, or both connected. It supports reverse buck, reverse boost, or reverse buck-boost operation to the input port from 2-cell to 7-cell batteries.
The RAA489118 offers programming resistor options, including autonomous charging, maximum output voltages, and adapter current limits. Additionally, it provides serial communication for programming many critical parameters, enabling a customized solution.
Parameters
| Attributes | Value |
|---|---|
| Topology [Rail 1] | Buck-Boost |
| Input Voltage (Min) (V) | 3.9 |
| Input Voltage (Max) (V) | 30 |
| Input Current Limit Accuracy (% (±)) | 2.2 |
| Battery Charge Voltage | 2-7 cell battery |
| Charging Voltage Accuracy (Max) (±%) | 0.5 |
| Battery Charge Voltage Adjustment | 16mV steps |
| Charge Current Limit Accuracy | ±3.5 (6A) |
| Trickle Charge Current Range | 128mA, 256mA, 512mA, or 1024mA |
| Switching Frequency Range (Typical) (kHz) | 635 - 1000 |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFN | 4.0 x 4.0 x 0.70 | 32 | 0.4 |
Product Comparison
| RAA489118 | RAA489108 | |
| Input Voltage (Min) (V) | 3.9 | 3.9 |
| Input Voltage (Max) (V) | 30 | 30 |
| Input Current Limit Accuracy (% (±)) | 2.2 | 2 |
| Battery Charge Voltage | 2-7 cell battery | 2-4 cell battery |
| Charging Voltage Accuracy (Max) (±%) | 0.5 | 0.5 |
| Battery Charge Voltage Adjustment | 16mV steps | 8mV steps |
| Charge Current Limit Accuracy | ±3.5 (6A) | ±2.5 (6A) |
| Trickle Charge Current Range | 128mA, 256mA, 512mA, or 1024mA | 64mA, 128mA, 256mA, or 512mA |
Application Block Diagrams
 | 240W USB Type-C Battery System This flexible battery system supports 2-7 Li-ion cells, USB-C charging, and power bank functionality. |
 | 100W USB PD Battery Charger 100W USB PD platform offers efficient charging, safety features, and a user-friendly design for electronics. |
 | USB PD Charger Battery Management High-efficiency USB PD charger battery management system supports up to 240W, multi-cell packs, and fuel gauging. |
 | Multi-Cell USB PD Power Bank with Quick Charge 2.0/3.0 60W+ USB PD power bank offers efficient charging with multi-cell setup and Bluetooth LE monitoring. |
 | USB PD Adapter with Turbo Boost High-power USB PD system supports devices needing over 20V and up to 45W with broad compatibility. |
Additional Applications
- Standalone battery charging for 2- to 7-cell batteries, including those used in power tools, portable vacuums, battery-powered lawn mowers, and drones
- Suitable for 2- to 7-cell tablets, ultrabooks, notebooks, power banks, and any USB-C interface portable device requiring batteries
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Renesas Boards & Kits
RAA489118 Buck-Boost Charger Evaluation Boards
The RTKA489118DE0000BU and RTKA489118DE0010BU evaluation boards are designed to evaluate the performance of the RAA489118. The default values for maximum and minimum output voltages, autonomous charging mode, and the adapter current limit charging function can be programmed using a resistor... Read More
140W USB Type-C Battery System for 2 to 7S Li-ion Evaluation Kit (RTK-G015-EPRSinkCharger-140W)
This is a single-port evaluation kit for implementing battery systems with 2 to 7 cells connected in series. It supports two modes: one where power is supplied solely from the USB Type-C® port, and another that enables a power bank function when used with a lithium‑ion battery and a Battery... Read More
240W USB Type-C Battery System for 2 to 7S Li-ion Evaluation Kit (RTK-G015-EPRSinkCharger-240W)
The RTKA489EPRDK0000BU (RTK-G015-EPRSinkCharger-240W) evaluation kit incorporates advanced safety features and an efficient 3-level DC/DC buck controller to reduce heating and BoM cost. It supports modes that allow power from the USB Type-C® port and enable a power bank in combination with a 2-... Read More
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Partner Solutions
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
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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
Partner Solutions (1)
100W USB Type-C Battery System Reference Design for 2 to 7S Li-ion
This is a single-port reference design for implementing battery systems with 2 to 7 cells connected in series. It supports two modes: one where power is supplied solely from the USB Type-C® port, and another that enables a power bank function in combination with a lithium-ion battery with a... Read More
Support Communities
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Issue while migrating from Dedicated I²C (RIIC) to SCI I²C (HCI I²C) — Unable to communicate with slave
... accuracy or timing constraints between the two modules? Any guidance, example configurations, or migration notes would be greatly appreciated. Environment details: MCU:RA6M5 FSP version: v6.0.0 I²C speed: Standard Slave device: RAA489118 PMIC Thank you for your support.RegardsSarthak Malik This thread was automatically locked due to age.
Oct 9, 2025
Knowledge Base
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RAA489800 Configuration Support
... Question: Which configuration does RAA489800 Support? Answer: In addition to 4-switch buck-boost configuration, it can also support 2-switch Buck mode operation. RAA489800 is voltage regulator but if you are looking for Buck-Boost Narrow VDC Battery Charger kindly check RAA489108/RAA489118 Suitable Products RAA489800 RAA489108 RAA489118
Nov 7, 2024
Support Communities
