- 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 N 沟道功率 MOSFET 选择器的 SMBus 2 至 4 节降压电池充电控制器
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The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.
The bq24725 uses two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.
SMBus controlled input current, charge current, and charge voltage DACs allow for high regulation accuracies that can be programmed by the system power management micro-controller.
The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.
The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm2 QFN package.
- SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies
- Automatic N-channel MOSFET Selection of System Power Source from Adapter or Battery Driven by Internal Charge Pumps
- Enhanced Safety Features for Over Voltage Protection, Over Current Protection, Battery, Inductor and MOSFET Short Circuit Protection
- Programmable Input Current, Charge Voltage, Charge Current Limits
- ±0.5% Charge Voltage Accuracy up to 19.2V
- ±3% Charge Current Accuracy up to 8.128A
- ±3% Input Current Accuracy up to 8.064A
- ±2% 20x Adapter Current or Charge Current Amplifier Output Accuracy
- Programmable Battery Depletion Threshold, and Battery LERAN Function
- Programmable Adapter Detection and Indicator
- Integrated Soft Start
- Integrated Loop Compensation
- Real Time System Control on ILIM pin to Limit Charge Current
- AC Adapter Operating Range 9V-24V
- 5μA Off-State Battery Discharge Current
- 20-pin 3.5 × 3.5 mm2 QFN Package
- APPLICATIONS
- Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
- Personal Digital Assistant
- Handheld Terminal
- Industrial and Medical Equipment
- Portable Equipment
PowerPAD is a trademark of Texas Instruments.
- 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)
- 1.024
- Battery charge voltage (Max) (V)
- 19.2
- Absolute Vin (safety rating) (Max) ((V))
- 30
- Control interface
- SMBus
- Features
- Input OVP, Power Path
- Operating Vin (Min) (V)
- 0
- Rating
- Catalog
BQ24725的完整型号有：BQ24725RGRR、BQ24725RGRT，以下是这些产品的关键参数及官网采购报价：
BQ24725RGRR，工作温度：-40 to 85，封装：VQFN (RGR)-20，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BQ24725RGRR的批量USD价格：4.204（1000+）
BQ24725RGRT，工作温度：-40 to 85，封装：VQFN (RGR)-20，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BQ24725RGRT的批量USD价格：4.851（1000+）
BQ24725RGRR，工作温度：-40 to 85，封装：VQFN (RGR)-20，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BQ24725RGRR的批量USD价格：4.204（1000+）
BQ24725RGRT，工作温度：-40 to 85，封装：VQFN (RGR)-20，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BQ24725RGRT的批量USD价格：4.851（1000+）
