- 制造厂商：TI
- 产品类别：电源管理
- 技术类目：电池管理 IC - 电池充电器 IC
- 功能描述：具有低输入电源检测功能的主机控制型多化合物电池充电器
- 点击这里打开及下载BQ24705的技术文档资料
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The bq24705 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-limited multi-chemistry battery charging applications. Charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors, or programmed by the system power-management microcontroller using a DAC or GPIOs.
The bq24705 charges two, three, or four series Li+ cells, supporting up to 8 A of charge current, and is available in a 24-pin, 4x4-mm thin QFN package.
The bq24705 features Dynamic Power Management (DPM) and input power limiting. These features reduce battery charge current when the input power limit is reached to avoid overloading the AC adapter when supplying the load and the battery charger simultaneously. A highly-accurate current-sense amplifier enables precise measurement of input current from the AC adapter to monitor the overall system power.
- NMOS-NMOS Synchronous Buck Converter with 600 kHz Frequency and >95% Efficiency
- 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle
- High-Accuracy Voltage and Current Regulation
- ±0.5% Charge Voltage Accuracy
- ±3% Charge Current Accuracy
- ±3% Adapter Current Accuracy
- ±2% Input Current Sense Amp Accuracy
- Integration
- Internal Loop Compensation
- Internal Soft-Start
- Safety
- Input Overvoltage Protection (OVP)
- Dynamic Power Management (DPM) with Status Indicator
- Supports Two, Three, or Four Li+ Cells
- 5 - 24 V AC/DC-Adapter Operating Range
- Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO Host Control
- Charge Voltage (4-4.512 V/cell)
- Charge Current (up to 8 A, with 10-m Sense Resistor)
- Adapter Current Limit (DPM)
- Status and Monitoring Outputs
- AC/DC Adapter Present with Programmable Voltage Threshold
- DPM Loop Active (DPMDET)
- Current Drawn from Input Source
- Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
- Charge Enable
- 10-μA Off-State Battery Current
- 24-pin, 4x4-mm QFN Package
- APPLICATIONS
- Notebook and Ultra-Mobile Computers
- Portable Data-Capture Terminals
- Portable Printers
- Medical Diagnostics Equipment
- Battery Bay Chargers
- Battery Back-Up Systems
- Number of series cells
- 2, 3, 4
- Charge current (Max) (A)
- 8
- Operating Vin (Max) (V)
- 24
- Cell chemistry
- Li-Ion/Li-Polymer
- Battery charge voltage (Min) (V)
- 8
- Battery charge voltage (Max) (V)
- 18
- Absolute Vin (safety rating) (Max) ((V))
- 30
- Control interface
- SMBus
- Features
- BAT temp thermistor monitoring (hot/cold profile)
- Operating Vin (Min) (V)
- 5
- Rating
- Catalog
BQ24705的完整型号有：BQ24705RGER、BQ24705RGET、HPA00753RGER，以下是这些产品的关键参数及官网采购报价：
BQ24705RGER，工作温度：0 to 125，封装：VQFN (RGE)-24，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24705RGER的批量USD价格：5.417（1000+）
BQ24705RGET，工作温度：0 to 125，封装：VQFN (RGE)-24，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24705RGET的批量USD价格：6.359（1000+）
HPA00753RGER，工作温度：0 to 125，封装：VQFN (RGE)-24，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：-，引脚镀层/焊球材料：-，TI官网HPA00753RGER的批量USD价格：5.417（1000+）
BQ24705RGER，工作温度：0 to 125，封装：VQFN (RGE)-24，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24705RGER的批量USD价格：5.417（1000+）
BQ24705RGET，工作温度：0 to 125，封装：VQFN (RGE)-24，包装数量MPQ：250个，MSL 等级/回流焊峰值温度：Level-2-260C-1 YEAR，引脚镀层/焊球材料：NIPDAU，TI官网BQ24705RGET的批量USD价格：6.359（1000+）
HPA00753RGER，工作温度：0 to 125，封装：VQFN (RGE)-24，包装数量MPQ：3000个，MSL 等级/回流焊峰值温度：-，引脚镀层/焊球材料：-，TI官网HPA00753RGER的批量USD价格：5.417（1000+）
