LP3910
- Two Low-Dropout Regulators With Programmable Output Voltages:
- LDO1 for General Purpose Applications
- LDO2 for Low-Noise Analog Applications
- Green and Red LED-Charger Status Drivers
- 4-Channel 8-Bit Dual Slope
Analog-to-Digital (ADC) Converter - 2 High-Efficiency DVS Buck Converters
- Wide Load Range Buck-Boost DC-DC Converter
- 400-kHz I2C-Compatible Interface
- Linear Constant-Current and Constant-Voltage Charger for Single-Cell Lithium-Ion Batteries
- USB and Adapter Charging
- System Power Supply Management
- Voltage and Thermal Supervisory Circuits
- Continuous Battery Voltage Monitoring
- Interrupt Request Output With 8 Sources
- 50-mΩ Battery Path Resistance
- 100-mA to 1000-mA Full-Rate Charge Current Using Wall Adapter
- Selectable 0.05C and 0.1C End-of-Charge (EOC) Current
- USB Current Limits of 100, 500, and 800 mA
- USB Pre-Qualification Current of 50 mA
- Selectable 4.1-V, 4.2-V or 4.38-V Battery-Termination Voltages
- 0.35% Battery-Termination Accuracy
- ±1 LSB INL/DNL on 8-Bit ADC
The LP3910 is a programmable system power management unit optimized for HDD-based portable media players. The device incorporates two low-dropout LDO voltage regulators, two integrated buck DC-DC converters with dynamic voltage scaling (DVS), one wide load-range buck-boost DC-DC converter with programmable output voltage, a 4-channel, 8-bit ADC, and a dual-source lithium-ion or lithium-polymer battery charger.
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, overcurrent protection, and a 10-hour safety timer. The device is programmable through a 400-kHz I2C-compatible interface.
The LP3910 is available in a thermally-enhanced
6-mm × 6-mm × 0.8-mm 48-pin WQFN package.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LP3910 Power Management IC for Hard-Drive-Based Portable Media Players 数据表 (Rev. M) | PDF | HTML | 2015-12-31 | ||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 应用手册 | Powering Portable Media Players (PMP) w/Innovative Solutions (Rev. A) | 2013-4-30 | ||||
| 用户指南 | AN-1598 LP3910 Evaluation Kit (Rev. A) | 2013-4-30 |
设计与开发
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| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| WQFN (NJV) | 48 | Ultra Librarian |