RRB96838

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.

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

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