LTC4062

量产

具微功率比较器的独立型线性锂离子电池充电器

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ADI公司所提供的资料均视为准确、可靠。但本公司不为用户在应用过程中侵犯任何专利权或第三方权利承担任何责任。技术指标的修改不再另行通知。本公司既没有含蓄的允许，也不允许借用ADI公司的专利或专利权的名义。本文出现的商标和注册商标所有权分别属于相应的公司。
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概述

  • 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

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
LTC4062
具微功率比较器的独立型线性锂离子电池充电器
800mA Single-Cell Li-Ion Battery Charger (C/10 Termination) Complete Charge Cycle (1100mAh Battery) Product Package 1
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eval board
schematic 1
DC789A

LTC4062EDD | 集成比较器的单节锂离子电池充电器， +VIN = 4.3V 至 8V， Bat = 4.2V (0.5A/1A)

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产品详情

DC789A：LTC4062集成微功率比较器的独立线性锂离子电池充电器演示板。
DC789A
LTC4062EDD | 集成比较器的单节锂离子电池充电器， +VIN = 4.3V 至 8V， Bat = 4.2V (0.5A/1A)
DC789A - Schematic

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