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描述
The bq25600 and bq25600D device are a highly-integrated 3.0-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The bq25600 and bq25600D are highly-integrated 3.0-A switch-mode battery charge management and system power path management device for single cell Li-Ion and Li-polymer battery. It features fast charging with high input voltage support for a wide range of smart phones, tablets and portable devices. Its low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time and extends battery life during discharging phase. Its input voltage and current regulation and battery remote sensing deliver maximum charging power to battery. The solution is highly integrated with input reverse-blocking FET (RBFET, Q1), high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between system and battery. It also integrates the bootstrap diode for the high-side gate drive for simplified system design. The I2C serial interface with charging and system settings makes the device a truly flexible solution.
The device supports a wide range of input sources, including standard USB host port, USB charging port, and USB compliant high voltage adapter. The device sets default input current limit based on the built-in USB interface. To set the default input current limit, the device uses the built-in USB interface, or takes the result from detection circuit in the system, such as USB PHY device. The device is compliant with USB 2.0 and USB 3.0 power spec with input current and voltage regulation. The device also meets USB On-the-Go (OTG) operation power rating specification by supplying 5.15 V on VBUS with constant current limit up to 1.2A.
The power path management regulates the system slightly above battery voltage but does not drop below 3.5 V minimum system voltage (programmable). With this feature, the system maintains operation even when the battery is completely depleted or removed. When the input current limit or voltage limit is reached, the power path management automatically reduces the charge current to zero. As the system load continues to increase, the power path discharges the battery until the system power requirement is met. This Supplement Mode prevents overloading the input source.
The device initiates and completes a charging cycle without software control. It senses the battery voltage and charges the battery in three phases: pre-conditioning, constant current and constant voltage. At the end of the charging cycle, the charger automatically terminates when the charge current is below a preset limit and the battery voltage is higher than recharge threshold. If the fully charged battery falls below the recharge threshold, the charger automatically starts another charging cycle.
The charger provides various safety features for battery charging and system operations, including battery negative temperature coefficient thermistor monitoring, charging safety timer and overvoltage and overcurrent protections. The thermal regulation reduces charge current when the junction temperature exceeds 110°C (programmable). The STAT output reports the charging status and any fault conditions. Other safety features include battery temperature sensing for charge and boost mode, thermal regulation and thermal shutdown and input UVLO and overvoltage protection. The VBUS_GD bit indicates if a good power source is present. The INT output Immediately notifies host when fault occurs.
The device also provides QON pin for BATFET enable and reset control to exit low power ship mode or full system reset function.
The device family is available in 30-ball, 2.0 mm × 2.4 mm WCSP package.
特性
High-Efficiency, 1.5-MHz, Synchronous Switch-Mode Buck Charger
92% Charge Efficiency at 2 A from 5-V Input
Optimized for USB Voltage Input (5 V)
Selectable Low Power Pulse Frequency Modulation (PFM) Mode for Light Load Operations
Supports USB On-The-Go (OTG)
Boost Converter With Up to 1.2-A Output
92% Boost Efficiency at 1-A Output
Accurate Constant Current (CC) Limit
Soft-Start Up To 500-µF Capacitive Load
Output Short Circuit Protection
Selectable Low Power PFM Mode for Light Load Operations
Single Input to Support USB Input and High Voltage Adapters
Support 3.9-V to 13.5-V Input Voltage Range With 22-V Absolute Maximum Input Voltage Rating
Programmable Input Current Limit (100 mA to 3.2 A With 100-mA Resolution) to Support USB 2.0, USB 3.0 Standards and High Voltage Adaptors (IINDPM)
Maximum Power Tracking by Input Voltage Limit Up to 5.4 V (VINDPM)
VINDPM Threshold Automatically Tracks Battery Voltage
Auto Detect USB SDP, DCP and Non-Standard Adaptors
High Battery Discharge Efficiency With 19.5-mΩ Battery Discharge MOSFET
Narrow VDC (NVDC) Power Path Management
Instant-On Works with No Battery or Deeply Discharged Battery
Ideal Diode Operation in Battery Supplement Mode
BATFET Control to Support Ship Mode, Wake Up and Full System Reset
Flexible Autonomous and I2C Mode for Optimal System Performance
High Integration Includes All MOSFETs, Current Sensing and Loop Compensation
17-µA Low Battery Leakage Current
High Accuracy
±0.5% Charge Voltage Regulation
±6% at 1.38-A Charge Current Regulation
±10% at 0.9-A Input Current Regulation
Remote Battery Sensing for Fast Charge
Create a Custom Design Using the bq25600 and bq25600D With theWEBENCH® Power Designer
深圳市烨弘轩电子有限公司，我司2011年成立于中国经济特区深圳.我司专注于为全球电子企业提供优质的电子零件供应服务，竭力打造全球品牌元器件零售与批量供应中心。专业经营各类电子元器件（集成电路IC，存储芯片，分立器件,电源,无源元件,连接器,继电器,传感器,光电子,开关,保险元件,紧固件,开发工具,变压器,测试与测量等）。 我们以低成本提供全方位一站式电子元件供应链采购方案，包括但不仅限于电子元件紧急物料搜寻，电子元件齐套供应、电子元件降低成本的长期供应，库存寄售等一系列供应链解决方案。优势供应各类电子组件.
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