LTC4076 Dual Input Standalone Battery Charger

The LTC®4076 is a standalone linear charger that is capable of charging a single-cell Li-Ion battery from both wall adapter and USB inputs. The charger can detect power at the inputs and automatically select the appropriate power source for charging.

No external sense resistor or blocking diode is required for charging due to the internal MOSFET architecture. Internal thermal feedback regulates the battery charge current to maintain a constant die temperature during high power operation or high ambient temperature conditions. The float voltage is fixed at 4.2V and the charge current is programmed with an external resistor. The LTC4076 terminates the charge cycle when the charge current drops below the user programmed termination threshold after the final float voltage is reached. The LTC4076 can be put into shutdown mode reducing the DCIN supply current to 20µA, the USBIN supply current to 10µA, and the battery drain current to less than 2µA even with power applied to both inputs.

Other features include automatic recharge, undervoltage lockout, charge status output, power present status output to indicate the presence of wall adapter or USB power and high power/low power mode (C/5) for USB compatible applications

产品特点 Features
  • Charges Single-Cell Li-Ion Batteries from Wall Adapter and USB Inputs
  • Automatic Input Power Detection and Selection
  • Charge Current Programmable up to 950mA from Wall Adapter Input
  • C/X Charge Current Termination
  • Thermal Regulation Maximizes Charge Rate Without Risk of Overheating*
  • Preset Charge Voltage with ±0.6% Accuracy
  • 18µA USB Suspend Current in Shutdown
  • Power Present Status Output
  • Charge Status Output
  • Automatic Recharge
  • Available in a Thermally Enhanced, Low Profi le (0.75mm) 10-Lead (3mm × 3mm) DFN Package
应用
  • Cellular Telephones
  • Handheld Computers
  • Portable MP3 Players
  • Digital Cameras
典型应用图
LTC4076 典型应用
参数
LTC4076 参数
LTC4076 订购信息和价格参考Package Variations and Pricing
器件型号 封装 引脚 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量) *
LTC4076EDD DFN 10 E $2.67 $1.88
LTC4076EDD#PBF DFN 10 E $2.67 $1.88
LTC4076EDD#TR DFN 10 E $1.98
LTC4076EDD#TRPBF DFN 10 E $1.98
LTC4076 数据手册及相关资料下载
  1. 数据手册(英文) : LTC4076 - Dual Input Standalone Battery Charger.PDF
  2. 可靠性数据 : R402 Reliability Data .PDF
  3. 产品选型卡 : Energy Harvesting Portfolio.PDF