NCP4371数据手册集成电路（IC）的电池充电器规格书PDF

描述 Description

NCP4371 is a USB secondary side fast-charging controller, supporting Qualcomm Quick Charge™ 3.0 (QC 3.0) High Voltage Dedicated Charging Port (HVDCP) Class A and Class B specification. NCP4371 allows for selection of the output voltage of an AC-DC USB adapter based on commands from the Portable Device (PD) being powered. Selecting a higher charging voltage will reduce the charging current for a given power level resulting in reduced IR drops and increased system efficiency. Another advantage of QC3.0 is a decreased battery charging time and a reduced PD system cost thanks to the ability to select an optimum charging voltage. This eliminates the need for costly DC-DC converters within the PD. The USB-bus voltage can be controlled in discreet steps from 3.6V up to 20V. The output current is limited not to exceed maximum allowable power level.

The NCP4371 resides at the secondary (isolated) side of the adapter. It includes voltage and current feedback regulation eliminating the need for a shunt regulator such as TL431.

The NCP4371 provides charging current limits down to VBUS=2.2V protecting the portable device from excessive currents in case of a soft short-circuit condition.

The NCP4371 integrates a safe-discharge circuitry to quickly and reliably discharge output capacitors in case the USB cable is unplugged or connected to a 5V only USB port.

特性 Features

• Supports Qualcomm Quick Charge™ 3.0 HVDCP Class A/B
• Increases system efficiency and reduces charging time
• Output Voltage Can be Configured in Discreet Steps from Class A: 3.6V up to 12V Class B: 3.6V up to 20V
• Supports a wide range of applications
• Constant Voltage and Constant Current Regulation
• Provides current protection and system robustness
• Soft Short-Circuit Current Limitation Down to VBUS = 2.2V
• Provides Short Circuit protection and system robustness
• USB pins ESD rated to 8 kV
• Increased robustness
• Removes a Need for the Secondary Side Shunt Regulator such as TL431
• Reduced BOM
• Output Capacitor Safe-Discharge Circuitry at Cable Unplug
• Safety
• Low Supply Current
• Increases system efficiency
• Wide Operating Input Voltage Range: 2.2V to 28V
• Design flexibility
• Compatible with USB Battery Charging Specification Revision 1.2 (USB BC1.2)
• Fast Dynamic Response
• Built-in Power Limiting Function
• Pb-free Device

应用 Application

• Fast Charging AC/DC Adapters
• Smart Phones Adapter
• Tablets Adapter
• Protable Device Adapter

简介

NCP4371属于集成电路（IC）的电池充电器。由制造生产的NCP4371电池充电器电池充电器 PMIC（电源管理集成电路）是元器件级产品系列，用于在电子设备中实现电池充电控制和充电管理功能。这些器件主要根据电池化学及其设计用于的电池数量来分类，可提供电化学电池和超级电容器安全充电所必需的电流或电压调节和监视功能。