Monolithic Power Systems MP3900

Description

The MP3900 is a boost controller that drives an external MOSFET capable of handling 10A current. It has an operational current of typically 180µA and can accommodate off-line, Telecom and non-isolated applications. Internalundervoltage lockout, slope compensation and peak current limiting are all provided to minimize the external component count. In a boost application, with an output voltage of less than 30V, the current sense pin can connect directly to the drain of the external switch. This eliminates the requirement for an additional current sensing element and its associated efficiency loss.While designed for boost applications, the MP3900 can also be used for other topologies including Forward, Flyback and Sepic. The 10V gate driver voltage minimizes the power loss of the external MOSFET while allowing the use of a wide variety of standard threshold devices.The MP3900 is available in 8-pin MSOP and SOIC packages.

Features

• Current Mode Control
• 10V MOSFET Gate Driver
• Undervoltage Lockout
• Internal Soft-Start
• Cycle-by-Cycle Current Limiting
• Slope Current Compensation
• Lossless Current Sense (VISENSE<30V)
• 10µA Shutdown Current
• 180µA Quiescent Current
• 330KHz Constant Frequency Operation
• Applicable to Boost, SEPIC, Flyback and Forward Topologies
• Available in an 8-Pin MSOP/SOIC Packages

Typical applications

• TV CCFL Power Generation
• Telecom Isolated Power

More information

• Datasheet
• IC product information