锂电池充电器
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ETA(钰泰半导体)
锂电池充电器
ETA6964A
ETA6964A is a highly-integrated 3A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. It features fast charging with high input voltage support for a wide range of smart phones, tablets and portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. Its input voltage and current regulation deliver maximum charging power to battery. The solution is highly integrated with input reverse-blocking FET (Q1), high-side switching FET (Q2), low-side switching FET (Q3), and battery FET (Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate drive for simplified system design. The device supports a wide range of input sources: standard USB host port, USB charging port, and USB compliant high voltage adapter. To support fast charging using high voltage adapter. The device is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. The device also meets USB On-the-Go (OTG) operation power rating specification by supplying 5.15 V on BUS with constant current limit up to 1.2A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5 V minimum system voltage. With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement Mode prevents overloading the input source.
ETA6964A is available in a QFN4x4-24 package.
FEATURES
High-Efficiency, 1.5MHz Synchronous Switching Buck Charger
91% Charge Efficiency at 2A from 5V Input
Programmable PFM Mode for Light Load Conditions
Supports USB On-The-Go (OTG)
Boost Converter with Up to 1.2A Output
91% Boost Efficiency at 1A Output
Output Short Circuit Protection
Wide Range Single Input to Support both USB Input and High Voltage Adapters
Support 3.9V to 13.5V Input Voltage Range with 22V Absolute Maximum Input Voltage Rating
Maximum Power Tracking by Input Voltage Limit Up to 4.5V (VINDPM)
Auto Detect USB BC1.2, SDP, CDP, DCP and Non-Standard Adaptors
High Battery Discharge Efficiency with 27mΩ Battery Discharge MOSFET
Narrow VDC (NVDC) Power Path Management
High Integration Includes All MOSFETs, Current Sensing and Loop Compensation
Safety
Battery Temperature Sensing for Charge and Boost Mode
Thermal Regulation and Thermal Shutdown
Input UVLO and Overvoltage Protection
Available in a QFN4x4-24 package
APPLICATIONS
Tablet PC, Smart Phone, Internet Devices
Portable Audio Speaker
Handheld Computers, PDA, POS
需要样品测试或详细资料请联系：18126521362（点击复制微信号）
