The bq24765 is a high-efficiency, synchronous battery charger with two integrated 30-mΩ NMOS power MOSFETs, and an integrated input current comparator, offering low component count for space-constraint, multi-chemistry battery charging applications. Input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller using SMBus. The bq24765 has switching frequency of 700 kHz. The bq24765 charges 2, 3, or 4 series Li+ cells, and is available in a 34-pin, 3.50 mm × 7.00 mm VQFN package.

The bq24765 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 adaptor when supplying the load and the battery charger simultaneously. A high-accuracy current sense amplifier enables accurate measurement of input current from the AC adapter, allowing monitoring the overall system power. If the adapter current is above the programmed low-power threshold, a signal is sent to host so that the system optimizes its power performance according to what is available from the adapter. An integrated comparator allows monitoring the input current through the current sense amplifier, and indicating when the input current exceeds a programmable threshold limit. The bq24765 features a thermal regulation loop to reduce battery charge current when the T_j limit is reached. This feature protects internal power FETs from overheating when charging with high current.

• Integrated Power MOSFETs, NMOS-NMOS, Synchronous Buck Converter
• >95% Efficiency
• Frequency 700kHz Allows Smaller Inductor (5 mm × 5 mm)
• Thermal Regulation Loop for Safety, Limit TJ = 120°C
• Adaptive 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
  • Integrated Power MOSFETs
  • Input Current Comparator
  • Internal Soft-Start
• Safety
  • Thermal Regulation Loop and Thermal Shutdown
  • Dynamic Power Management (DPM)
  • Power FETs Over Current Protection
• 7 V–24 V AC/DC-Adapter Operating Range
• Simplified SMBus Control
  • Charge Voltage DAC (1.024 V–19.2 V)
  • Charge Current DAC (128 mA–8.064 A)
  • Adapter Current Limit DPM DAC (256 mA–11.008 A)
• Status and Monitoring Outputs
  • AC/DC Adapter Present With Adjustable Voltage Threshold
  • Input Current Comparator, With Adjustable Threshold and Hysteresis
  • Current Sense Amplifier for Current Drawn From Input Source
• Charge Any Battery Chemistry: Li+, LiFePO4, NiCd, NiMH, Lead Acid (2, 3, and 4 Li-Ion Cells)
• Charge Enable Pin (CE)
• Energy Star Low Iq
  • < 10-μA Battery Current with Adapter Removed
  • < 1 mA Input DCINA Current When Adapter Present and Charge Disabled
• 34-pin, 3.50 mm × 7.00 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

All other trademarks are the property of their respective owners

• Number of series cells
• 2, 3, 4
• Charge current (Max) (A)
• 10
• Operating Vin (Max) (V)
• 24
• Cell chemistry
• Lead Acid, Li-Ion/Li-Polymer, Lithium Phosphate/LiFePO4, NiCd, NiMH
• Battery charge voltage (Min) (V)
• 1.024
• Battery charge voltage (Max) (V)
• 19.2
• Absolute Vin (safety rating) (Max) ((V))
• 30
• Control interface
• SMBus
• Features
• IC thermal regulation, IINDPM (Input current limit), Power Path
• Operating Vin (Min) (V)
• 7
• Rating
• Catalog

BQ24765的完整型号有：BQ24765RUVR、BQ24765RUVT，以下是这些产品的关键参数及官网采购报价：

BQ24765RUVR，工作温度：-40 to 155，封装：VQFN (RUV)-34，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BQ24765RUVR的批量USD价格：3.049（1000+）

BQ24765RUVT，工作温度：-40 to 155，封装：VQFN (RUV)-34，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BQ24765RUVT的批量USD价格：3.659（1000+）

BQ24765EVM — BQ24765 评估模块，适用于具有集成 FET 的 SMBus 控制的电池充电器

bq24765 评估模块是一块完整的充电器模块，用于评估使用 bq24765 器件的多节集成电源 MOSFET 同步笔记本充电器。它设计用于为锂离子或锂聚合物应用提供高达 8A 的充电电流。该充电电流可由类似 SBS 的 SMBus 接口编程。bq24765 针对小型电感器的频率为 700 kHz，具有专门与外部主机命令进行协作的高度集成的电池充电控制器。可通过类似 SBS 的 SMBus 接口编程充电电压、充电电流和输入电流。动态电源管理 (DPM) 功能根据系统负载情况修改充电电流，避免 AC 适配器过载。高准确度电流感应放大器能够准确测量出 AC 适配器电流，实现对整个系统电源的监控。