5A 2-4 Cell Buck-Boost Switching Battery Charger

RT9490

The RT9490 is a highly-integrated 5A Buck-Boost switch mode battery charge management and system power path management device for 2-4 cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I²C serial interface with charging and system settings makes the device a truly flexible solution.

The recommended junction temperature range is -40°C to 130°C, and the ambient temperature range is -40°C to 85°C.

Applications

Smart Phone/Tablet/Chrome Book
Drone
Portable Device and Accessory

Key Spec.

	RT9490
Status	Active
Vin (min) (V)	3.6
Vin (max) (V)	24
Battery Charge Voltage (max) (V)	18.8
Battery Charge Current (max) (A)	5
Status Indicator	Yes
Charger Type	Switching
Input Source	AC Adapter;USB
Features	ACOT Control;Adjustable Frequency;I2C;OCP;OVP;Power Good;SCP;UVP;Ultrasonic Mode Control
Package Type	WL-CSP2.93x3.46-56(BSC)
Built-in Power MOSFETs	Yes

Features

High Efficiency, 750kHz/1MHz/1.5MHz Programmable Frequencies, Synchronous Switch-Mode Buck-Boost Charger
► 96.7% Charge Efficiency at 2A with 9V Input and 8V Battery
► Supports 3.6V to 24V Input Voltage Range
► Average Input Current Regulation (AICR)
► Minimum Input Voltage Regulation (MIVR)
Supports USB On-The-Go (OTG)
► 93.8% OTG Efficiency at 2A with 8.4V Battery and 5V Output
► Output Voltage with 10mV resolution to support USB-PD
► BAT Current Limit Regulation (BCLR)
Supports Dual Input Selection
Supports BC1.2, Host mode and FRS/Seamless
Supports 11-Channel, 16-bit ADC
Low Battery Quiescent Current
High Accuracy for Charger CV and ICHG
Protection
► Over-Temperature Protection (OTP)
► Junction Thermal Regulation (JTR)
► Input Protection (VAC OVP/VBUS OVP/OCP)
► Battery Overvoltage Protection (VBAT OVP)
► System Voltage Protection (VSYS OVP/UVP)
► System Over-Load Protection (VSYS OLP)
► Cycle-by-Cycle Overcurrent Protection (OCP)
► OTG Low Battery Protection (OTG LBP)
► OTG Voltage Protection (OTG OVP/UVP)