LP3913

更新时间： 2024-11-15 04:19:55

品牌	Logo	应用领域
美国国家半导体 - NSC		闪存便携式
页数	文件大小	规格书
6页	166K
描述
Power Management IC for Flash Memory Based Portable Media Players

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中文翻译

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LP3913 数据手册

ADVANCE INFORMATION

November 2006

LP3913

Power Management IC for Flash Memory Based Portable

Media Players

General Description

The LP3913 is a programmable system power management

unit that is optimized for Flash Memory based Portable Media

Players.

Features

2 low-dropout regulators -- LDO1 is used for general

■

purpose applications, LDO2 is used for low-noise analog

applications. Both LDOs have programmable output

voltages.

The LP3913 incorporates 2 low-dropout LDO voltage regula-

tors, 3 integrated Buck DC/DC converters with Dynamic Volt-

age Scaling (DVS), a 4-channel 8-bit A/D converter, and a

dual source Li-Ion/polymer battery charger. The charger has

the capability to charge and maintain a single cell battery from

a regulated wall adapter or USB power. When both USB and

adapter sources are present, then the adapter source takes

precedence and switching between USB and adapter power

sources is seamless. In addition, the battery charger supports

power routing, which allows system usage immediately after

an external power source has been detected. The LP3913

also incorporates some advanced battery management func-

tions such as battery temperature measurement, reverse cur-

rent blocking for USB, LED charger status indication,

thermally regulated internal power FETs, battery voltage

monitoring, over-current protection and a 10 hour safety

timer.

Green and Red LED charger status drivers

■

4-channel 8-bit dual slope a/d converter

3 High-efficiency DVS Buck converters

400 kHz I²C compatible interface

Linear constant-current / constant-voltage charger for

single cell lithium-ion batteries

USB and Adapter charging

■

System power supply management

6x6x0.8mm 48 LLP package

Voltage and thermal supervisory circuits

Continuous battery voltage monitoring

Interrupt Request output with 8 sources

LP3913 is pin for pin and software compatible with the

LP3910 Hard Drive based PMIC

The 4-channel A/D converter measures the battery voltage

and charge current, which can be used for fuel gauging. Two

undedicated channels can be used to measure other analog

parameters such as discharge current, battery temperature,

keyboard resistor scanning and more.

LDO1: 150 mA, 1.2V–3.3V

The various IC parameters are programmable through a

400 kHz I²C compatible interface.

The LP3913 is available in

thermally-enhanced

6x6x0.8 mm 48 LLP package and operates over an ambient

temperature range of –40°C to +85°C.

Selectable 0.05C and 0.1C EOC current

USB current limit of 100 mA, 500 mA, and 800 mA

USB pre-qual current of 50 mA

■

Selectable 4.1V, 4.2V or 4.38V battery termination

voltages

0.35% battery termination accuracy

±1 LSB INL/DNL on 8-bit a/d converter

■

Applications

Flash-based portable media players

■

Portable gaming devices

Portable navigation systems

300001

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中文翻译

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与LP3913相关器件

型号	品牌	获取价格	描述	数据表
LP3913SQ-AB	NSC	获取价格	Power Management IC for Flash Memory Based Portable Media Players
LP3913SQ-AR	TI	获取价格	IC,POWER CONTROL/MANAGEMENT,LLCC,48PIN,PLASTIC
LP3913SQX-AA	NSC	获取价格	IC 4-CHANNEL POWER SUPPLY SUPPORT CKT, QCC48, 6 X 6 MM, 0.80 MM HEIGHT, 0.40 MM PITCH, LLP
LP3913SQX-AB	NSC	获取价格	Power Management IC for Flash Memory Based Portable Media Players
LP3913SQX-AR	TI	获取价格	IC,POWER CONTROL/MANAGEMENT,LLCC,48PIN,PLASTIC
LP3917	NSC	获取价格	CDMA Cellular Phone Power Management Unit
LP3917RL-M	NSC	获取价格	CDMA Cellular Phone Power Management Unit
LP3917RL-N	NSC	获取价格	CDMA Cellular Phone Power Management Unit
LP3917RL-N/NOPB	TI	获取价格	CDMA Cellular Phone Power Management Unit 49-DSBGA
LP3917RL-NL	NSC	获取价格	CDMA Cellular Phone Power Management Unit

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