LP3910SQ-AN

更新时间： 2024-02-07 20:51:17

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
60页	7916K
描述
Power Management IC for Hard Drive Based Portable Media Players

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中文翻译

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LP3910SQ-AN 数据手册

August 20, 2009

LP3910SQ-AN

Power Management IC for Hard Drive Based Portable Media

Players

General Description

The LP3910SQ-AN is a programmable system power man-

agement 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 LP3910SQ-AN incorporates 2 low-dropout LDO voltage

regulators, 2 integrated Buck DC/DC converters with Dynam-

ic Voltage 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 LP3910SQ-AN also incorporates

some advanced battery management functions such as bat-

tery temperature measurement, reverse current blocking for

USB, LED charger status indication, thermally regulated in-

ternal 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

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–pin LLP package

Voltage and thermal supervisory circuits

Continuous battery voltage monitoring

Interrupt Request output with 8 sources

Key Specifications

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.

LDO1: 150 mA, 1.2V–3.3V

■

LDO2: 150 mA, 1.3V–3.3V

BUCK1: 600 mA, 0.8V–2.0V

BUCK2: 600 mA, 1.8V–3.3V

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.

BUCK-Boost: 1000 mA, 1.8V–3.3V

50 mΩ battery path resistance

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

adapter

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 various IC parameters are programmable through a

400 kHz I²C compatible interface.

The LP3910SQ-AN is available in a thermally-enhanced

6x6x0.8 mm 48–pin LLP package and operates over an am-

bient 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 media players

■

Portable gaming players

Portable navigation devices

301012

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与LP3910SQ-AN相关器件

型号	品牌	获取价格	描述	数据表
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
LP3910SQX-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-AP/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
LP3913	NSC	获取价格	Power Management IC for Flash Memory Based Portable Media Players
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

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