雷竞技竞猜下载Allegro Microsystems released new bridge type MOSFET driver IC

雷竞技竞猜下载Allegro Microsystems released new bridge type MOSFET driver IC

October 9, 2012

For the high current dc brush motor drive in portable applications

Located in Worcester, Massachusetts- 雷竞技竞猜下载Allegro MicroSystems released new bridge type MOSFET controller, use with external N channel power MOSFET.A4957Designed to use the application of high power dc brush motor.The power supply has a wide voltage range, for 7 V and 50 V.The new device is mainly for commercial and industrial applications, such as portable power tools, gardening equipment, industrial blower, elevator, conveyor, forklifts and so on.

Allegro 'A4957 used 24 fuses ES encapsulation, designed to meet the performance of these applications drive motor and the retail price.Unique charge pump voltage regulator offers complete (> 10 V) gate drive, in response to low voltage power supply to 7 V or when the gate drive voltage to 4.5 V.Bootstrap capacitor is used to provide the N channel MOSFET need battery power supply voltage.Unique bootstrap charge management system to ensure that the bootstrap capacitor charging enough, always to supply high-end gate drive circuit.External resistor configuration of dead time can be independently controlled by the user the power MOSFET and from breakdown.The integrated diagnosis may indicate under-voltage and thermal breakdown.

A4957SESTR -t the 24 - conductor, 4 mm * 4 mm * 0.75 mm QFN packages, bare bonding pad in order to enhance heat dissipation.Its packaging are lead-free products, fog and with 100% of tin plating (suffix T).