LM3420AM5-8.4/NOPB集成电路（IC）的电池充电器规格书PDF中文资料

LM3420AM5-8.4/NOPB属于集成电路（IC）的电池充电器。由德州仪器制造生产的LM3420AM5-8.4/NOPB电池充电器电池充电器 PMIC（电源管理集成电路）是元器件级产品系列，用于在电子设备中实现电池充电控制和充电管理功能。这些器件主要根据电池化学及其设计用于的电池数量来分类，可提供电化学电池和超级电容器安全充电所必需的电流或电压调节和监视功能。

1 Features

1• 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

2 Applications

• Lithium-Ion Battery Charging

• Suitable for Linear and Switching Regulator

Charger Designs

3 Description

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.