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