NCP1422中文资料升压转换器，同步整流，PFM，DC-DC，800 mA，带真切断和振荡消除器数据手册ONSEMI规格书

描述 Description

NCP1422 is a monolithic micropower high frequency step-up switching converter IC specifically designed for battery-operated hand-held electronic products up to 800mA loading. It integrates Sync-Rect to improve efficiency and to eliminate the external Schottky Diode. High switching frequency (up to 1.2 MHz) allows for a low profile, small-sized inductor and output capacitor to be used. When the device is disabled, the internal conduction path from LX or BAT to OUT is fully blocked and the OUT pin is isolated from the battery. This True-Cutoff function reduce the shutdown current to typically only 50nA. Ring-Killer is also integrated to eliminate the high-frequency ringing in discontinuous conduction mode. In addition to the above, Low-Battery Detector, Logic-Controlled Shutdown, Cycle-by-Cycle Current Limit and Thermal Shutdown provide value-added features for various battery-operated applications. With all these functions ON, the quiescent supply current is typical only8.5 uA. This device is available in compact and low profile DFN10 package.

特性 Features

• Output Current up to 800 mA at VIN = 2.5 V and VOUT = 3.3 V
• High Switching Frequency, up to 1.2MHz
• Anti-Ringing Ring-Killer for Discontinuous Conduction Mode
• Low Quiescent Current of 8.5 µA
• 1.0V Startup at No Load Guaranteed
• Output Voltage from 1.5V to 5V Adjustable
• 1.5A Cycle by Cycle Current Limit
• On Chip Thermal Shutdown with Hysteresis
• Housed in Space-Saving and Low Profile DFN10 package
• Pb-Free Package is Available

应用 Application

• Personal Digital Assistants (PDA)
• Handheld Digital Audio Products
• Camcorders and Digital Still Cameras
• Conversion from one to two Alkaline, NiMH, NiCd battery cells to 3.0-5.0V or one Lithium-ion cells to 5.0V
• While LED Flash for Digital Cameras

简介

NCP1422属于开发板套件编程器的评估板-LED驱动器。由ONSEMI制造生产的NCP1422评估板 - LED 驱动器LED 驱动器评估板是带有元器件的电路板，用于提供特定电路或器件的工作实例。该系列评估板提供一个 LED 驱动器实例，用于可调节闪烁、模拟亮度、背光、双极开关、升压转换器、亮度控制、相机闪光灯、可调光、恒流和 RGB 控制，以及更多其他应用。