LP3910

更新时间： 2024-02-10 19:09:49

品牌	Logo	应用领域
美国国家半导体 - NSC		驱动器便携式
页数	文件大小	规格书
6页	165K
描述
Power Management IC for Hard Drive Based Portable Media Players

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中文翻译

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数据手册

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LP3910 数据手册

ADVANCE INFORMATION

November 2006

LP3910

Power Management IC for Hard Drive Based Portable Media

Players

General Description

The LP3910 is a programmable system power management

unit that is optimized for HDD-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 LP3910 incorporates 2 low-dropout LDO voltage regula-

tors, 2 integrated Buck DC/DC converters with Dynamic Volt-

age Scaling (DVS), 1 wide load range Buck-Boost DC/DC

converter with programmable output voltage, 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 main-

tain 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 be-

tween USB and adapter power sources is seamless. In addi-

tion, the battery charger supports power routing, which allows

system usage immediately after an external power source

has been detected. The LP3910 also incorporates some ad-

vanced battery management functions such as battery tem-

perature measurement, reverse current blocking for USB,

LED charger status indication, thermally regulated internal

power FETs, battery voltage monitoring, over-current protec-

tion and a 10 hour safety timer.

Green and Red LED charger status drivers

■

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

2 High-efficiency DVS Buck converters

Wide load range Buck-Boost DC/DC converter

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

The Buck-Boost DC/DC converter targets the power man-

agement of Hard Disk Drives and maintains a typical operat-

ing voltage of 3.3V ±5% with a battery voltage below or above

this output level. The Buck-Boost output voltage can be se-

lected to be as low as 1.8V.

Key Specifications

LDO1: 150 mA, 1.2V–3.3V

■

LDO2: 150 mA, 1.3V–3.3V

Buck1: 600 mA, 0.8V–2.0V

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.

Buck2: 600 mA, 1.8V–3.3V

Buck-Boost: 1000 mA, 1.8V–3.3V

50 mΩ battery path resistance

100 mA–1000 mA full-rate charge current using wall

adapter

The various IC parameters are programmable through a

400 kHz I²C compatible interface.

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

■

The LP3910 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 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

Hard drive-based MP3 players

■

Portable media players

Portable gaming devices

202123

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中文翻译

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与LP3910相关器件

型号	品牌	获取价格	描述	数据表
LP3910SQ-AA	NSC	获取价格	Power Management IC for Hard Drive Based Portable Media Players
LP3910SQ-AA/NOPB	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, LEA
LP3910SQ-AB	NSC	获取价格	Power Management IC for Flash Memory Based Portable Media Players
LP3910SQ-AK/NOPB	TI	获取价格	面向基于硬盘的便携式媒体播放器的电源管理 IC (PMIC) \| NJV \| 48
LP3910SQ-AN	NSC	获取价格	Power Management IC for Hard Drive Based Portable Media Players
LP3910SQ-AN/NOPB	TI	获取价格	面向基于硬盘的便携式媒体播放器的电源管理 IC (PMIC) \| NJV \| 48
LP3910SQX-AA	NSC	获取价格	Power Management IC for Hard Drive Based Portable Media Players
LP3910SQX-AA/NOPB	TI	获取价格	面向基于硬盘的便携式媒体播放器的电源管理 IC (PMIC) \| NJV \| 48 \| -
LP3910SQX-AB	NSC	获取价格	Power Management IC for Flash Memory Based Portable Media Players
LP3910SQX-AN	NSC	获取价格	Power Management IC for Hard Drive Based Portable Media Players

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