BQ24703_TI 具有系统电源选择器的主机控制型多化合物电池充电器

BQ24703的基本参数

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：具有系统电源选择器的主机控制型多化合物电池充电器
点击这里打开及下载BQ24703的技术文档资料
TI代理渠道，提供当日发货、严格的质量标准，满足您的目标价格

BQ24703的产品详情：

The bq24702/bq24703 is a highly integrated battery charge controller and selector tailored for notebook and sub-notebook PC applications.

The bq24702/bq24703 uses dynamic power management (DPM) to minimize battery charge time by maximizing use of available wall-adapter power. This is achieved by dynamically adjusting the battery charge current based on the total system (adapter) current.

The bq24702/bq24703 uses a fixed frequency, pulse width modulator (PWM) to accurately control battery charge current and voltage. Charge current limits can be programmed from a keyboard controller DAC or by external resistor dividers from the precision 5-V, ±0.6%, externally bypassed voltage reference (VREF), supplied by the bq24702/bq24703.

The battery voltage limit can be programmed by using the internal 1.196-V, ±0.5% precision reference, making it suitable for the critical charging demands of lithium-ion cells. Also, the bq24702/bq24703 provides an option to override the precision reference and drive the error amplifier either directly from an external reference or from a resistor divider off the 5 V supplied by the integrated circuit.

The selector function allows the manual selection of the system power source, battery or wall-adapter power. The bq24702/bq24703 supports battery-conditioning and battery-learn cycles through the ACSEL function. The ACSEL function allows manual selection of the battery or wall power as the main system power. It also provides autonomous switching to the remaining source (battery or ac power) should the selected system power source terminate (refer to Available Options table for the differences between the bq24702 and the bq24703). The bq24702/bq24703 also provides an alarm function to indicate a depleted battery condition.

The bq24702/bq24703 PWM controller is ideally suited for operation in a buck converter for applications when the wall-adapter voltage is greater than the battery voltage.

BQ24703的优势和特性：

Dynamic Power Management, DPM Minimizes Battery Charge Time
Integrated Selector Supports Battery Conditioning and Smart Battery Learn Cycle
Zero Volt Operation
Selector Feedback Circuit Ensures Break-Before-Make Transition
±0.4% Charge Voltage Accuracy, Suitable for Charging Li-Ion Cells
±4% Charge Current Accuracy
300-kHz Integrated PWM Controller for High-Efficiency Buck Regulation
Depleted Battery Detection and Indication to Protect Battery From Over Discharge
20-μA Sleep Mode Current for Low Battery Drain
24-Pin TSSOP Package and 5 mm × 5 mm QFN package (bq24703 only)

BQ24703的参数（英文）：

Number of series cells
2, 3, 4
Charge current (Max) (A)
10
Operating Vin (Max) (V)
28
Cell chemistry
Li-Ion/Li-Polymer
Battery charge voltage (Min) (V)
8.4
Battery charge voltage (Max) (V)
16.8
Absolute Vin (safety rating) (Max) ((V))
30
Control interface
Standalone (RC-Settable)
Features
Power Path
Operating Vin (Min) (V)
7
Rating
Catalog

BQ24703具体的完整产品型号参数及价格（美元）：

BQ24703的完整型号有：BQ24703PW、BQ24703PWR、BQ24703RHDR，以下是这些产品的关键参数及官网采购报价：

BQ24703PW，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：60个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ24703PW的批量USD价格：2.561（1000+）

BQ24703PWR，工作温度：-40 to 125，封装：TSSOP (PW)-24，包装数量MPQ：2000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网BQ24703PWR的批量USD价格：2.134（1000+）

BQ24703RHDR，工作温度：-40 to 85，封装：VQFN (RHD)-28，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BQ24703RHDR的批量USD价格：2.032（1000+）

BQ24703的评估套件：

BQ24703的电路图解：

BQ24703的评估套件：