BCT1451数据手册Broadchip中文资料规格书

描述 Description

The BCT1451 is a high frequency, synchronous Buck converter with integrated switches. It can deliver up to 600mA to the output over a wide input voltage range of 5V to 42V. It is suitable for various industrial or automotive applications with high input voltage or for power conditioning from unregulated sources. Moreover, the low 14μA quiescent current and ultra-low shutdown current of only 0.6μA make it a suitable choice for battery-powered applications.

BCT1451 features high efficiency over a wide load range achieved by scaling down the switching frequency at light loads to reduce switching and gate driving losses. Other features include internal compensation, internal monotonic soft-start even with pre-biased output and fast loop response thanks to the peak- current mode controller. Switching at 1.2MHz, the BCT1451 can prevent EMI noise problems, such as the ones found in AM radio, ADSL and PLC applications.

Protection features include current limiting and short- circuit protection, thermal shutdown with auto recovery and output over-voltage protection. Frequency fold-back helps prevent inductor current runaway during startup.

BCT1451 is available in a Green SOT23-6 package.

特性 Features

• Wide 5V~42V Operating Input Voltage Range
• 0.8V Internal Reference
• Low Quiescent Current: 14μA (TYP)
• Shutdown Current: 0.6μA (TYP)
• Current Output up to 600mA
• 1.2MHz Switching Frequency
• Internal Compensation and Soft-Start
• Simple Design and Minimal External
• Components
• Up to 95% Efficiency at 12V/400mA
• 0.8V to 24V Adjustable Output Voltage
• Current Limit and Short-Circuit Protection
• Output Over-Voltage Protection and Thermal
• Shutdown
• Power-Save Mode and PWM Mode Operation
• Monotonic Startup with Pre-biased Output
• 90% Maximum Duty Cycle
• Available in a Green SOT23-6 Package
• -40℃ to +85℃ Operating Temperature Range

应用 Application

• High Voltage Power Conversions
• Automotive Systems
• Industrial Power Systems
• Distributed Power Systems
• Battery Powered Systems
• Power Meters