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在线产品描述:
BQ25720是一款同步NVDC降压-升压电池充电控制器，可从多种输入电源(包括USB适配器、高压USB-C电源和传统适配器)为1至4芯电池充电。
NVDC配置允许根据电池电压对系统进行调节，但不会低于系统最低电压。即使电池完全放电或取出，系统也会继续运行。当负载功率超过输入电源额定值时，电池进入补充模式，防止系统崩溃。
在上电期间，充电器根据输入源和电池条件将转换器设置为降压、升压或降压-升压配置。该充电器无需主机控制即可在降压、升压和降压-升压工作模式之间无缝转换。
在没有输入源的情况下，BQ25720支持1至4芯电池的USB On-The-Go(OTG)功能，以在VBUS上产生可调的3 V至24 V输出，分辨率为8 mV。OTG输出电压转换速率可以配置为符合USB-PD 3.0 PPS规范。
当只有电池为系统供电且USB OTG端口没有连接外部负载时，BQ25720实现了最新的英特尔Vmin主动保护(VAP)功能，在该功能中，设备对电池的VBUS电压进行充电，以在输入去耦电容器中存储一些能量。在系统峰值功率峰值期间，存储在输入电容器中的能量会补充系统，以防止系统电压降至最小系统电压以下而导致系统崩溃。
BQ25720监控适配器电流、电池电流和系统电源。灵活编程的PROCHOT输出在需要时直接进入中央处理器进行节流。
最新版本的USB-C PD规范包括快速角色互换(FRS)，以确保电源角色互换及时发生，从而使连接到底座的设备(S)可以避免短暂断电或故障。该器件集成了符合PD规范的FR。
TI专利的开关频率抖动模式可显著降低整个传导EMI频率范围(150 kHz至30 MHz)的EMI噪声。多种抖动比例选项可为不同应用提供灵活性，以简化EMI噪声过滤器设计。
充电器可在TI专利的直通模式(PTM)下运行，以提高全负载范围内的效率。在PTM中，输入功率直接通过充电器传递到系统。BQ25720采用32针4 mm×4 mm WQFN封装，可节省MOSFET的开关损耗和电感铁芯损耗，实现高效运行。
产品特性:
- Pin-to-pin compatible to BQ25710
- Buck-boost narrow voltage DC (NVDC) charger for USB-C Power Delivery (PD) interface platform
- 3.5-V to 26-V input range to charge 1- to 4-cell battery
- Charge current up to 16.2 A/8.1 A with 128-mA/64-mA resolution based on 5-mΩ/10-mΩ sensing resistor
- Input current limit up to 10 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor
- Support USB 2.0, USB 3.0, USB 3.1 and USB Power Delivery (PD)
- Input Current Optimizer (ICO) to extract max input power without overloading the adapter
- Integrated Fast Role Swap (FRS) feature following USB-PD specification
- Seamless transition between buck, buck-boost, and boost operations
- Input current and voltage regulation (IINDPM and VINDPM) against source overload
- TI patented switching frequency dithering pattern for EMI noise reduction
- TI patented Pass Through Mode (PTM) for system power efficiency improvement and battery fast charging achieving 99% efficiency.
- IMVP8/IMVP9 compliant system features for Intel platform
- Enhanced Vmin Active Protection (VAP) mode supplements battery from input capacitors during system peak power spike following latest Intel specification
- Comprehensive PROCHOT profile
- Two level discharge current limit PROCHOT profile to avoid battery wire-out
- System power monitor
- Input and battery current monitor through dedicated pins
- Integrated 8-bit ADC to monitor voltage, current and power
- Battery MOSFET ideal diode operation in supplement mode to support system when adapter is fully loaded
- Power up USB port from battery (USB OTG)
- 3-V to 24-V OTG with 8-mV resolution
- Output current limit up to 12.7 A/6.35 A with 100-mA/50-mA resolution based on 5-mΩ/10-mΩ sensing resistor
- 800-kHz/1.2-MHz programmable switching frequency with 2.2-µH/1.0-µH inductor
- SMBus host control interface for flexible system configuration
- High accuracy for the regulation and monitor
- ±0.5% Charge voltage regulation
- ±3% Charge current regulation
- ±2.5% Input current regulation
- ±2% Input/charge current monitor
- Safety
- Thermal shutdown
- Input, system, battery overvoltage protection
- Input, MOSFET, inductor overcurrent protection
- Package: 32-Pin 4.0 mm × 4.0 mm WQFN
串联电池数量1,2,3,4
充电电流(Max)(A)16.2
Vin(Max)(V)26
电池化学类型LeadAcid,Li-Ion/Li-Polymer,LithiumPhosphate/LiFePO4,NiCd,NiMH,SuperCap
Batterycharge电压(Min)(V)1.024
Batterycharge电压(Max)(V)19.2
绝对输入电压(Max)(V)32
控制接口SMBus
特性BATtempthermistormonitoring(JEITAprofile),BATtempthermistormonitoring(hot/coldprofile),ICthermalregulation,ICO(输入CurrentOptimization),IINDPM(输入currentlimit),输入OVP,IntegratedADC,PowerPath,USBC/PDcompatible,USBOTGintegrated
Vin(Min)(V)3.5
等级产品样本
370791121
2119841551