BQ24750_TI 具有系统电源选择器的主机控制型 2 至 4 节降压电池充电控制器

BQ24750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 2 至 4 节降压电池充电控制器
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BQ24750的产品详情：

The bq24750 is a high-efficiency, synchronous battery charger with integrated compensation and system power selector logic, offering low component count for space-constrained multi-chemistry battery charging applications. Ratiometric 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 bq24750 charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm QFN package.

The bq24750 controls external switches to prevent battery discharge back to the input, connect the adapter to the system, and to connect the battery to the system using 6-V gate drives for better system efficiency. For maximum system safety, inrush-power limiting provides instantaneous response to high input voltage multiplied by current. This AC Over-Power protection (ACOP) feature limits the input-switch power to the programmed level on the ACOP pin, and latches off if the high-power condition persists to prevent overheating.

The bq24750 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.

BQ24750的优势和特性：

NMOS-NMOS Synchronous Buck Converter with 300 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
- Automatic System Power Selection From AC/DC Adapter or Battery
- Internal Loop Compensation
- Internal Soft Start
Safety
- Input Overvoltage Protection (OVP)
- Dynamic Power Management (DPM) with Status Indicator
- Programmable Inrush Adapter Power (ACOP) and Overcurrent (ACOC) Limits
- Reverse-Conduction Protection Input FET
- Battery Thermistor Sense Input (TS) for Charge Qualification
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 10 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
- Current Drawn from Input Source
Supports Any Battery Chemistry: Li+, NiCd, NiMH, Lead Acid, etc.
Charge Enable
10-μA Off-State Current
28-pin, 5x5-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

BQ24750的参数（英文）：

Number of series cells
2, 3, 4
Charge current (Max) (A)
10
Operating Vin (Max) (V)
24
Cell chemistry
Li-Ion/Li-Polymer
Battery charge voltage (Min) (V)
8
Battery charge voltage (Max) (V)
18.048
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

BQ24750具体的完整产品型号参数及价格（美元）：

BQ24750的完整型号有：BQ24750RHDR、BQ24750RHDT，以下是这些产品的关键参数及官网采购报价：

BQ24750RHDR，工作温度：-40 to 125，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BQ24750RHDR的批量USD价格：4.62（1000+）

BQ24750RHDT，工作温度：-40 to 125，封装：VQFN (RHD)-28，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BQ24750RHDT的批量USD价格：5.544（1000+）

BQ24750的评估套件：

BQ24750的电路图解：

BQ24750的评估套件：