LP3913 - 面向基于闪存的便携式媒体播放器的电源管理 IC (PMIC)

LP3913是TI德州仪器公司的一款无产品，LP3913是面向基于闪存的便携式媒体播放器的电源管理 IC (PMIC)，本站介绍了LP3913的封装应用图解、特点和优点、功能等，并给出了与LP3913相关的TI元器件型号供参考。

LP3913 - 面向基于闪存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 LP3913 is a programmable system power management unit that is optimized for Flash Memory based Portable Media Players.

The LP3913 incorporates 2 low-dropout LDO voltage regulators, 3 integrated Buck DC/DC converters with Dynamic Voltage 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 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 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 LP3913 is available in a thermally-enhanced 6x6x0.8 mm 48 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
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
6x6 x 0.8 mm 48 WQFN 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

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
Buck3: 500 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
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

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