- 制造厂商：TI
- 产品类别：电源管理
- 技术类目：电池管理 IC - 电池充电器 IC
- 功能描述：锂离子电池充电控制器
- 点击这里打开及下载LM3420的技术文档资料
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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.
- 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
- Number of series cells
- 1, 2, 3, 4
- Charge current (Max) (A)
- 0.015
- Operating Vin (Max) (V)
- 20
- Cell chemistry
- Li-Ion/Li-Polymer
- Battery charge voltage (Min) (V)
- 4.2
- Battery charge voltage (Max) (V)
- 4.2
- Absolute Vin (safety rating) (Max) ((V))
- 20
- Control interface
- Standalone (RC-Settable)
- Features
- IC thermal regulation
- Operating Vin (Min) (V)
- 13
- Rating
- Catalog
LM3420的完整型号有：LM3420AM5-8.4/NOPB、LM3420M5X-8.4/NOPB，以下是这些产品的关键参数及官网采购报价：
LM3420AM5-8.4/NOPB，工作温度：-40 to 125，封装：SOT-23 (DBV)-5，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3420AM5-8.4/NOPB的批量USD价格：2.933（1000+）
LM3420M5X-8.4/NOPB，工作温度：-40 to 125，封装：SOT-23 (DBV)-5，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3420M5X-8.4/NOPB的批量USD价格：2.933（1000+）
LM3420AM5-8.4/NOPB，工作温度：-40 to 125，封装：SOT-23 (DBV)-5，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3420AM5-8.4/NOPB的批量USD价格：2.933（1000+）
LM3420M5X-8.4/NOPB，工作温度：-40 to 125，封装：SOT-23 (DBV)-5，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM3420M5X-8.4/NOPB的批量USD价格：2.933（1000+）
