LP3918TL/NOPB屬于集成電路（IC）的電池充電器。由美國(guó)德州儀器公司制造生產(chǎn)的LP3918TL/NOPB電池充電器電池充電器 PMIC（電源管理集成電路）是元器件級(jí)產(chǎn)品系列，用于在電子設(shè)備中實(shí)現(xiàn)電池充電控制和充電管理功能。這些器件主要根據(jù)電池化學(xué)及其設(shè)計(jì)用于的電池?cái)?shù)量來(lái)分類，可提供電化學(xué)電池和超級(jí)電容器安全充電所必需的電流或電壓調(diào)節(jié)和監(jiān)視功能。

FEATURES

? Fully Integrated Li-Ion Battery Charger with

Thermal Regulation

? USB Charge Mode

? 7 Low Noise LDO’s

– 2 x 300 mA

– 3 x 150 mA

– 2 x 80 mA

? I2C Compatible Interface for Controlling LDO

Outputs and Charger Operation

? Thermal Shutdown

? Under Voltage Lockout

? 25-Bump Thin DSBGA Package 2.5 x 2.5 mm

? Options Available on Request, Please Contact

Sales Office for Further Information;

– Level Detect on HF_PWR & PWR_ON

– LDO Charging Mode

– Custom Default Settings on Charger, and

LDO O/P's.

APPLICATIONS

? CDMA Phone Handsets

? Low Power Wireless Handsets

? Handheld Information Appliances

? Personal Media Players

? Digital Cameras

KEY SPECIFICATIONS

? 50mA to 950mA Programmable Charge

Current

? 3.0V to 5.5V Input Voltage Range

? 200mV Typ. Dropout Voltage on 300 mA LDO’s

? 2% (Typ) Output Voltage Accuracy on LDO’s

DESCRIPTION

The LP3918 is a fully integrated charger and multi- regulator unit designed for CDMA cellular phones.

The LP3918 contains a Li-Ion battery charger, 7 low

noise low dropout (LDO) voltage regulators and a

high-speed serial interface to program on/off

conditions and output voltages of individual

regulators, and also to read status information from

the PMU.

The Li-Ion charger integrates a power FET, reverse

current blocking diode, sense resistor with current

monitor output, and requires only a few external

components. Charging is thermally regulated to

obtain the most efficient charging rate for a given

ambient temperature.

LDO regulators provide high PSRR and low noise

ideally suited for supplying power to both analog and digital loads.