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天鈺科技股份有限公司

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 首頁 產品應用 LCD-TV HV Buck DC/DC Converter

FR9888

Description

The FR9888 is a synchronous step-down DC/DC converter that provides wide 4.5V to 23V input voltage range and 3.5A continuous load current capability. The FR9888 fault protection includes cycle-by-cycle current limit, input UVLO, output over voltage protection and thermal shutdown. Besides, adjustable soft-start function prevents inrush current at turn-on. This device uses current mode control scheme which provides fast transient response. Internal Compensation function reduces external compensation components and simplifies the design process. In shutdown mode, the supply current is less than 1μA. The FR9888 is available in an 8-pin SOIC package, provides a very compact system solution and good thermal conductance.

 
Features

檔案下載

● High Efficiency up to 96%
● Low Rds(on) Integrated Power MOSFET
● Internal Compensation Function
● Wide Input Voltage Range: 4.5V to 23V
● Adjustable Output Voltage Range: 0.925V to 20V
● 3.5A Output Current
● Fixed 340KHz Switching Frequency
● Current Mode Operation
● Adjustable Soft-Start
● Cycle-by-Cycle current limit
● Input Under Voltage Lockout
● Over-Temperature Protection with Auto Recovery
● <1μA Shutdown Current
● SOP-8 Exposed Pad Package
 
Applications
● Set-Top-Box (STB)
● Television
● Distributed Power System
● XDSL Modem
 

Pin Assignments

Ordering Information

 

 

Typical Application Circuit

 
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