特長
- Buck-boost charger for 2-, 3-, or 4-cell Li-ion batteries
- Input voltage range: 3.9V to 23.4V (no dead zone)
- Battery output voltage: 2.4V to 18.304V
- Autonomous charging option (with BFET configuration only)
- Passthrough mode in the forward direction
- Switching frequency up to 1MHz
- Adapter current and battery current monitoring (AMON/BMON)
- ALERT# open-drain output
- Trickle charging support for depleted batteries
- Reverse buck, boost, and buck-boost operation from the battery
- Battery ship mode option
- SMBus and auto-increment I2C compatibility
- 4mm × 4mm 32-lead TQFN package
説明
The RRB96838 is a buck-boost battery charger supporting input voltages up to 23.4V and battery voltages up to 18.3V. It can operate in direct battery charging mode without a battery FET or in narrow-voltage DC (NVDC) charging mode with a battery FET. Featuring advanced Renesas R3™ technology, it ensures highly efficient light-load operation and fast transient response.
For direct battery charging, the RRB96838 supports 2- to 4-cell batteries, making it ideal for applications such as power tools, portable vacuums, drones, robots, and power banks. As an NVDC charger, it regulates system output to a narrow voltage range, ensuring stable system bus voltage. In NVDC operation, system power can be sourced from the adapter, battery, or a combination of both.
The RRB96838 is compatible with a wide range of DC power sources, including USB Type-C® and USB Power Delivery (PD) adapters, and safely charges battery packs with up to four serially connected Li-ion cells. It also supports reverse buck, boost, and buck-boost operation, enabling power transfer from the battery to the input port. Additionally, the RRB96838 features SMBus and I2C serial communication, allowing programming of critical parameters for a fully customized solution.
製品比較
| RRB96838 | RAA489108 | |
| Input Voltage (Min) (V) | 3.2 | 3.9 |
| Input Voltage (Max) (V) | 23.4 | 30 |
| Input Current Limit Accuracy (% (±)) | 2 | 2 |
| Battery Charge Voltage | 2-4 cell battery | 2-4 cell battery |
| Charging Voltage Accuracy (Max) (±%) | 0.5 | 0.5 |
| Battery Charge Voltage Adjustment | 8mV steps | 8mV steps |
| Charge Current Limit Accuracy | ±2.5 (6A) | ±2.5 (6A) |
| Trickle Charge Current Range | 64mA, 128mA, 256mA, or 512mA | 64mA, 128mA, 256mA, or 512mA |
パラメータ
| 属性 | 値 |
|---|---|
| Topology [Rail 1] | Buck-Boost |
| Input Voltage (Min) (V) | 3.2 |
| Input Voltage (Max) (V) | 23.4 |
| Input Current Limit Accuracy (% (±)) | 2 |
| Battery Charge Voltage | 2-4 cell battery |
| Charging Voltage Accuracy (Max) (±%) | 0.5 |
| Battery Charge Voltage Adjustment | 8mV steps |
| Charge Current Limit Accuracy | ±2.5 (6A) |
| Trickle Charge Current Range | 64mA, 128mA, 256mA, or 512mA |
| Switching Frequency Range (Typical) (kHz) | 635 - 1000 |
パッケージオプション
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TQFN | 4.0 x 4.0 x 0.70 | 32 | 0.4 |
アプリケーション
- Power tools
- Portable vacuums
- Drones
- Power banks