描述 Description

The LTC?4062 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 LTC4062 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.

Applications Handheld Computers Portable MP3 Players Digital Cameras

特性 Features

? 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

簡(jiǎn)介

LTC4062屬于集成電路（IC）的電池充電器。由制造生產(chǎn)的LTC4062電池充電器電池充電器 PMIC（電源管理集成電路）是元器件級(jí)產(chǎn)品系列，用于在電子設(shè)備中實(shí)現(xiàn)電池充電控制和充電管理功能。這些器件主要根據(jù)電池化學(xué)及其設(shè)計(jì)用于的電池?cái)?shù)量來(lái)分類，可提供電化學(xué)電池和超級(jí)電容器安全充電所必需的電流或電壓調(diào)節(jié)和監(jiān)視功能。