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LM3420

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锂离子电池充电控制器

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数据表

LM3420

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产品详情

Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 0.015 Features IC thermal regulation Vin (min) (V) 13 Vin (max) (V) 20 Absolute max Vin (max) (V) 20 Control topology Linear Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Control interface Standalone (RC-Settable) Operating temperature range (°C) -40 to 125
Rating Catalog Number of series cells 1, 2, 3, 4 Cell chemistry Li-Ion/Li-Polymer Charge current (max) (A) 0.015 Features IC thermal regulation Vin (min) (V) 13 Vin (max) (V) 20 Absolute max Vin (max) (V) 20 Control topology Linear Battery charge voltage (min) (V) 4.2 Battery charge voltage (max) (V) 4.2 Control interface Standalone (RC-Settable) Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Input Voltage Range: up to 20 V
  • Voltage Options for Charging 1, 2, 3, or 4 Cells
  • Output Current up to 15 mA
  • Precision (0.5%) End-of-Charge Control
    • LM3420 ±1%
    • LM3420A ±0.5%
  • Drive Capability for External Power Stage
  • Temperature Drift Curvature Correction for
    Voltage Stability
  • Low Quiescent Current, 85 µA (Typ.)
  • Tiny SOT-23-5 package
  • Input Voltage Range: up to 20 V
  • Voltage Options for Charging 1, 2, 3, or 4 Cells
  • Output Current up to 15 mA
  • Precision (0.5%) End-of-Charge Control
    • LM3420 ±1%
    • LM3420A ±0.5%
  • Drive Capability for External Power Stage
  • Temperature Drift Curvature Correction for
    Voltage Stability
  • Low Quiescent Current, 85 µA (Typ.)
  • Tiny SOT-23-5 package

The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for lithium-ion rechargeable batteries. The LM3420 is available in an 8.4-V version for one through four cell charger applications.

Included in a very small package is an (internally compensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors. The amplifier’s inverting input is externally accessible for loop frequency compensation. The output is an open-emitter NPN transistor capable of driving up to 15 mA of output current into external circuitry.

A trimmed precision bandgap reference utilizes temperature drift curvature correction for excellent voltage stability over the operating temperature range. The LM3420 series allows for precision end-of-charge voltage threshold for lithium-ion rechargeable batteries. The premium grade LM3420A is available with an initial voltage threshold tolerance of ±0.5%, while the standard grade LM3420 has an initial voltage threshold tolerance of ±1%.

The LM3420 is available in a sub-miniature 5-lead surface mount package thus allowing very compact designs.

The LM3420 series of controllers are monolithic integrated circuits designed for charging and end-of-charge control for lithium-ion rechargeable batteries. The LM3420 is available in an 8.4-V version for one through four cell charger applications.

Included in a very small package is an (internally compensated) op amp, a bandgap reference, an NPN output transistor, and voltage setting resistors. The amplifier’s inverting input is externally accessible for loop frequency compensation. The output is an open-emitter NPN transistor capable of driving up to 15 mA of output current into external circuitry.

A trimmed precision bandgap reference utilizes temperature drift curvature correction for excellent voltage stability over the operating temperature range. The LM3420 series allows for precision end-of-charge voltage threshold for lithium-ion rechargeable batteries. The premium grade LM3420A is available with an initial voltage threshold tolerance of ±0.5%, while the standard grade LM3420 has an initial voltage threshold tolerance of ±1%.

The LM3420 is available in a sub-miniature 5-lead surface mount package thus allowing very compact designs.
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类型 标题 下载最新的英语版本 日期
* 数据表 LM3420 8.4-V Li-Ion Battery Charge Controller 数据表 (Rev. E) PDF | HTML 2014年 12月 15日
EVM 用户指南 AN-1969 LM3424 Boost Evaluation Board (Rev. A) 2013年 5月 3日
EVM 用户指南 AN-1985 LM3429 Buck-Boost Evaluation Board (Rev. C) 2013年 5月 3日
EVM 用户指南 AN-1986 LM3429 Boost Evaluation Board (Rev. B) 2013年 5月 3日
EVM 用户指南 AN-1872 LM3423 Boost Evaluation Board (Rev. B) 2013年 5月 1日
EVM 用户指南 AN-1907 LM3423 Buck-Boost Configuration Evaluation Board (Rev. A) 2013年 5月 1日
应用手册 Battery Charging 2007年 3月 21日

设计和开发

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封装 引脚 CAD 符号、封装和 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

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