MOSFET gate driver A4910 series

The A4910 is a three-phase controller for use with N-channel external power MOSFETs and is specifically designed for automotive applications. A unique charge pump regulator provides full (>10 V) gate drive for battery voltages down to 7 V, and allows the A4910 to operate with a reduced gate drive down to 5.5 V. A bootstrap capacitor is used to provide the above battery supply voltage required for N-channel MOSFETs. An internal charge pump for the high-side drive allows DC (100% duty cycle) operation. Full control over all six power MOSFETs in the 3-phase bridge is provided, allowing motors to be driven with block commutation or sinusoidal excitation. The power MOSFETs are protected from shoot-through by integrated crossover control and programmable dead time. Current in each half bridge can be measured using integrated current sense amplifiers. These are three user-configurable differential amplifiers, with below ground common mode range and excellent transient response and settling time, allowing them to be used in low-side current sense applications.