LTC4062EDD
发布时间：2018/5/17
概述
The LTC4062EDD is a full-featured, flexible, standalone linear charger for single-cell Lithium-Ion batteries. It is capable of operating within USB power specifications.
Both programmable time and programmable current based termination schemes are available. Furthermore, the CHRG open-drain status pin can be programmed to indicate the battery charge state according to the needs of the application. A precise low power comparator is available even with no power applied as long as battery voltage is higher than 2.5V. Additional safety features designed to maximize battery lifetime and reliability include the SmartStart charging algorithm.
No external sense resistor or external blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The charge current is programmed with an external resistor. With power applied, the LTC4062EDD can be put into shutdown mode to reduce the supply current to 20μA and the battery drain current to less than 5μA. Without power applied, the internal low power comparator can work sinking only 10μA from the battery.
Other features include smart recharge, USB C/5 current programming input and undervoltage lockout.
*Protected by U.S. Patents, including 6522118.
特点
Charge Current Programmable up to 1A
Charges Single Cell Li-Ion Batteries Directly from USB Port
Preset Float Voltage with ±0.35% Accuracy
Micropower Comparator for Battery Monitoring
Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*
Programmable Charge Current Detection/Termination
Programmable Charge Termination Timer
Smart Pulsing Error Feature
SmartStartTM Prolongs Battery Life
20μA Charger Quiescent Current in Shutdown
Available in a Low Profile (0.75mm) 10-Lead
(3mm × 3mm) DFN Package
应用
Handheld Computers
Portable MP3 Players
Digital Cameras
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