LP3910 - 面向基于硬盘的便携式媒体播放器的电源管理 IC (PMIC)

LP3910是TI德州仪器公司的一款无产品，LP3910是面向基于硬盘的便携式媒体播放器的电源管理 IC (PMIC)，本站介绍了LP3910的封装应用图解、特点和优点、功能等，并给出了与LP3910相关的TI元器件型号供参考。

LP3910 - 面向基于硬盘的便携式媒体播放器的电源管理 IC (PMIC) - 无 - 电源管理多通道IC(PMIC)解决方案 - 德州仪器

产品描述

The LP3910 is a programmable system power management unit that is optimized for HDD-based Portable Media Players.

The LP3910 incorporates 2 low-dropout LDO voltage regulators, 2 integrated Buck DC/DC converters with Dynamic 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 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 LP3910 also incorporates some advanced battery management functions such as battery temperature measurement, reverse current blocking for USB, LED charger status indication, thermally regulated internal power FETs, battery voltage monitoring, over-current protection and a 10 hour safety timer.

The Buck-Boost DC/DC converter targets the power management of Hard Disk Drives and maintains a typical operating voltage of 3.3V ±5% with a battery voltage below or above this output level. The Buck-Boost output voltage can be selected to be as low as 1.8V.

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.

The various IC parameters are programmable through a 400 kHz I2C-compatible interface.

The LP3910 is available in a thermally-enhanced 6x6x0.8 mm 48-pin WQFN package and operates over an ambient temperature range of –40°C to +85°C.

产品特性

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.
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 WQFN Package
Voltage and Thermal Supervisory Circuits
Continuous Battery Voltage Monitoring
Interrupt Request Output with 8 Sources

Key Specifications

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
BUCK-Boost: 1000 mA, 1.8V–3.3V
50 mΩ Battery Path Resistance
100 mA to 1000 mA Full-Rate Charge Current Using Wall Sdapter
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

下面可能是您感兴趣的TI德州仪器公司无元器件

TI公司产品现货专家，订购TI公司产品不限最低起订量，TI芯片大陆现货即时发货，香港库存3-5天发货，海外库存7-10天发货

寻找全球TI代理商现货货源 - TI公司（德州仪器）电子元件在线订购