亚博棋牌游戏Allegro MicroSystems introduced new three-phase brushless dc motor drive IC
June 15, 2010
亚博棋牌游戏Allegro MicroSystems introduced new three-phase brushless dc motor drive IC
June 15, 2010
Office automation market
Worcester, Massachusetts,- 亚博棋牌游戏Allegro MicroSystems introduced new three-phase brushless dc motor drive, can be as the highest power supply voltage is 38 V full N channel power MOSFET three-phase bridge of large current gate drive to provide output directly.The AllegroA4936Device has three hall element input, one for the rectifier control sequencer, fixed downtime of pulse width modulation (PWM) current control, and locked rotor test.The new device is mainly used for office automation market of laser printer and copier silicon drum drive.
Through the use of external MOSFET, can change the size of the output current.Can by means of the external capacitor CLD terminal set locked rotor test time delay.Can be imported using PWM, direction, braking and stopping, position and torque control motor speed.Motor speed signal to determine FG can use motor coil, the signal can be amplified through the built-in differential amplifier and a comparator and forming, to generate digital FGS output.External MOSFETS on-resistance will be through the use of PWM input of external signal or using built-in PWM current regulator for PWM control.In either case, Allegro A4936 synchronous rectifier function may be started by current attenuation corresponding MOSFET, reduce power consumption.
When equipped with filter in order to prevent mistakes rectified signal noise, low prices of the hall element can be used.A4936可提供 7.5 V 稳压电源，以向三个霍尔元件供电。内部电路保护包括滞后过热关机、欠压锁定及停机时间保护。不需要特别的加电排序。工作温度范围为 -20°C 至 105°C。
A4936 using 5 mm x 5 mm, 32 terminal QFN packages, with an exposed heat conduction shims.The small package as lead-free packaging, fog and pin box with 100% of tin plating.