A4931mettr-t qfn8 motor drive chip advantage shipment
A4931 is a complete three-phase brushless DC motor pre driver. The device can drive a wide range of n-channel power MOSFETs and can support motor supply voltages up to 30V. The commute logic is determined by three Hall element inputs spaced at 120 °.
Other functions include fixed off time pulse width modulation (PWM) current control, locked rotor protection with adjustable delay, thermal shutdown, overvoltage monitor and synchronous rectification. In the current attenuation process of internal synchronous rectification, the power dissipation is reduced by turning on the appropriate MOSFET, so as to short circuit the body diode with low RDS (on) MOSFET. When the motor pumping power supply voltage * overvoltage threshold during current recirculation, overvoltage protection disables synchronous rectification.
A4931 provides enable, direction and braking inputs to control the current used for phase or enable cut-off. Logic outputs FG1 and fg2 can be used to accurately measure motor rotation. The output signal switches state during hall conversion and provides * * speed output to microcontroller or speed control circuit.
The operating temperature range is - 20 ° C to 105 ° C. A4931 adopts 5mm × 5mm, 28 end QFN package with exposed heat pad. This small footprint package is lead-free (PB) plated with * * matte tin lead frame.
Features and benefits
▪ Drive 6 n-channel MOSFETs
▪ Low power synchronous rectifier
▪ Internal UVLO and thermal shutdown circuit
▪ Hall element input
▪ PWM current limiting
▪ Dead zone protection
▪ FG output
▪ standby mode
▪ Lock detection protection
▪ Overvoltage protection
Other functions include fixed off time pulse width modulation (PWM) current control, locked rotor protection with adjustable delay, thermal shutdown, overvoltage monitor and synchronous rectification. In the current attenuation process of internal synchronous rectification, the power dissipation is reduced by turning on the appropriate MOSFET, so as to short circuit the body diode with low RDS (on) MOSFET. When the motor pumping power supply voltage * overvoltage threshold during current recirculation, overvoltage protection disables synchronous rectification.
A4931 provides enable, direction and braking inputs to control the current used for phase or enable cut-off. Logic outputs FG1 and fg2 can be used to accurately measure motor rotation. The output signal switches state during hall conversion and provides * * speed output to microcontroller or speed control circuit.
The operating temperature range is - 20 ° C to 105 ° C. A4931 adopts 5mm × 5mm, 28 end QFN package with exposed heat pad. This small footprint package is lead-free (PB) plated with * * matte tin lead frame.
Features and benefits
▪ Drive 6 n-channel MOSFETs
▪ Low power synchronous rectifier
▪ Internal UVLO and thermal shutdown circuit
▪ Hall element input
▪ PWM current limiting
▪ Dead zone protection
▪ FG output
▪ standby mode
▪ Lock detection protection
▪ Overvoltage protection