A4915: 3-Phase MOSFET Driver

The A4915 is designed for pulse width modulated (PWM) current control of 3-phase brushless DC motors. The A4915 is capable of high current gate drive for 6 all N-channel power MOSFETs. An internal charge pump ensures gate drive down to 7 V supply and provides limited gate drive down to 5 V. A bootstrap capacitor is used to generate a supply voltage greater than the source voltage of the high side MOSFET, required for N-channel MOSFETs.

Internal synchronous rectification control circuitry is provided to improve power dissipation in the external MOSFETs during PWM operation. Internal circuit protection includes latched thermal shutdown, dead time protection, and undervoltage lockout. Special power up sequencing is not required.

Allegro recommended hall latches:APS13290-1。

A4915中提供一个28-pin TSSOP交货posed thermal pad (suffix LP) and a 28-contact 5 × 5 mm QFN with an exposed thermal pad (suffix ET). These packages are lead (Pb) free, with 100% matte tin leadframe plating.

• 5 to 50 V supply voltage
• Latched TSD with fault output
• Drives six N-channel high current MOSFETs
• Internally controlled synchronous rectification
• Speed voltage input enables internal PWM duty cycle control of full bridge
• Center aligned PWM
• Internal UVLO and crossover current protection
• Hall switch inputs
• Adjustable dead time protection
• Low power sleep mode for battery-powered applications