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LTC1730 - 典型应用图例：
LTC1730典型应用图例一
LTC1730 - 封装图解：
LTC1730封装图解一
LTC1730封装图解二
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LINEAR产品 - LTC1730介绍

LTC1730 - LTC1730是Lithium-Ion Battery Pulse Chargers with Overcurrent Protection

LTC1730是LINEAR凌力尔特公司的一款脉冲充电器产品，LTC1730是LTC1730是Lithium-Ion Battery Pulse Chargers with Overcurrent Protection，本站介绍了LTC1730的封装应用图解、特点和优点、功能等，并给出了与LTC1730相关的LINEAR元器件型号供参考。

LTC1730 - LTC1730是Lithium-Ion Battery Pulse Chargers with Overcurrent Protection - 脉冲充电器 - 电源管理 - 凌力尔特

LTC1730 - Lithium-Ion Battery Pulse Chargers with Overcurrent Protection

LTC1730 - Lithium-Ion Battery Pulse Chargers with Overcurrent Protection - Linear Technology（凌力尔特）

功能描述

The LTC1730 is a complete pulse charger for 1-cell lithium-ion batteries. When charging a depleted cell, the internal MOSFET is fully on allowing the current limited input power source to provide charge current to the battery, virtually eliminating heat generation in the charger.

As the battery accepts charge and approaches the programmed voltage, the internal MOSFET begins switching off and on with the duty cycle gradually decreasing as the battery approaches a fully charged condition. A programmable timer ends the charge cycle. The end-of-charge condition is indicated at the CHRG pin when the average charge current falls to C/10. Removing the input voltage puts the LTC1730 into a sleep mode, dropping the battery current drain to less than 1µA (maximum).

An external sense resistor limits the maximum charge current as a safety precaution against a user connecting a wall adapter with the incorrect or no current limit. The internal MOSFET prevents reverse battery current from flowing if the input voltage is shorted to ground, eliminating the need for a blocking diode.

The LTC1730-4 is available in the 16-pin SSOP package and the LTC1730-4.2 is available in the 8-pin SO package.

特点
  • Complete Pulse Charger for 1-Cell Lithium-Ion Batteries
  • Sense Resistor Limits Maximum Current for Safety
  • 1% Float Voltage Accuracy
  • End-of-Charge (C/10) Detection Output
  • Programmable Charge Termination Timer
  • Internal 0.35 Ohm NMOS Switch
  • No Blocking Diode Required
  • SEL Pin to Set Either 4.1V or 4.2V/ Cell (LTC1730-4)
  • Low-Battery Drain (1µA Max) when Input Supply Is Removed
  • Battery Temperature Sensing and Charge Qualification
  • Automatic Trickle Charge for Low-Battery Cell
  • Automatic Battery Refresh
    • 应用
  • Standalone Lithium-Ion Battery Charger
  • Handheld Computers
  • Cellular Telephones
    • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LTC1730EGN-4 SSOP-16 E $2.33 $2.05
    LTC1730EGN-4#PBF SSOP-16 E $2.33 $2.05
    LTC1730EGN-4#TR SSOP-16 E $2.11
    LTC1730EGN-4#TRPBF SSOP-16 E $2.11
    LTC1730ES8-4.2 SO-8 E $2.07 $1.85
    LTC1730ES8-4.2#PBF SO-8 E $2.07 $1.85
    LTC1730ES8-4.2#TR SO-8 E $1.91
    LTC1730ES8-4.2#TRPBF SO-8 E $1.91
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