LM3420 - 锂离子电池充电控制器

LM3420是TI德州仪器公司的一款电池充电器IC产品，LM3420是锂离子电池充电控制器，本站介绍了LM3420的封装应用图解、特点和优点、功能等，并给出了与LM3420相关的TI元器件型号供参考。

LM3420 - 锂离子电池充电控制器 - 电池充电器IC - 电池管理产品 - 德州仪器

产品特性

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

产品应用

Lithium-Ion Battery Charging
Suitable for Linear and Switching Regulator Charger Designs

产品说明

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.

产品器件信息

PART NUMBER	PACKAGE	BODY SIZE (NOM)
LM3420	SOT-23 (5)	2.90 mm x 1.60 mm

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