ETA4662
ETA4662 is 500mA Single Cell Li-Ion Battery Charger manufactured by ETA.
DESCRIPTION
The ETA4662 is a single cell battery charger with power path management function for Li-Ion and Li-Polymer battery. It features pre-charging, fast charging (CC) and constant voltage (CV) charging, end-of charging termination, and auto-recharge, and built-in safe-timer preventing from being over-charged or host running out of control. The power path management function features a low dropout regulator from the input to the system and a low RDSON switch from battery to the system, so it separates the charging current from the system load. This function prioritizes the battery and the system, ensuring the continuous power supply to the system. Parameters and functions are programmed or selected through an I2C patible serial interface, such as input current limit, charging current, battery regulation voltage, safety timer, battery UVLO. It also features a safe watchdog protection. The ETA4662 is available in FCQFN-9L package.
FEATURES
- Fully Autonomous Charger for Single Cell Li-Ion and Li-Polymer Battery
- 21V Maximum Input Voltage Rating with Over Voltage Protection
- I2C Interface for Setting Charging Parameters and Status Reporting
- Fully Integrated Power Switch and No External Blocking Diode Required
- Battery Temperature Monitor and Programmable Timer
- Battery or PCB Over-Temperature Protection
- System Reset Function
- Battery Disconnection Function
- Thermal Limiting Regulation on Chip
- FCQFN-9L 1.75x1.75mm
APPLICATIONS
- Wearable Devices
- Smart Watches
- Io T Gadgets
- Smart Handheld Devices
TYPICAL APPLICATION
USB Por t MCU
A1 IN 1u F
SYS A2
4.7u F
B2 n INT
BAT A3
C1 SDA
C2 SCL
NTC B1
C3 GND
VDD B3
2.2u F
.
RTS 100n F
To System
Li-ion battery pac k
.etasolution. ETA4662_REV1.8
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ORDERING INFORMATION
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