A3931KJPT

Product Summary

The A3931KJPT is a 3-phase brushless dc (BLDC) motor controller for use with N-channel external power MOSFETs. The A3931KJPT incorporates much of the circuitry required to design a cost effective three-phase motor drive system, and have been specifically designed for automotive applications. A key automotive requirement is functionality over a wide input supply range. A unique charge pump regulator provides adequate (>10 V) gate drive for battery voltages down to 7 V, and allows the A3931KJPT to operate with a reduced gate drive at battery voltages down to 5.5 V. Power dissipation in the charge pump is minimized by switching from a voltage doubling mode at low supply voltage to a dropout mode at the nominal running voltage of 14 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 for dc (100% duty cycle) operation.

Parametrics

A3931KJPT absolute maximum ratings: (1)VBB VBB pin: -0.3 to 50 V; (2)Logic Input/Output Voltage VRESET RESET pin input: -0.3 to 6 V; (3)Remaining logic pins: -0.3 to 7 V; (4)Output Voltage Range; (5)VGHx GHA, GHB, and GHC pins: VSx to VSx+ 15 V; (6)VGLx GLA, GLB, and GLC pins: -5 to 16 V; (7)VCx CA, CB, and CC pins: - VSx+ 15 V; (8)VSx SA, SB, and SC pins: -5 to 45 V; (9)CSP, CSN, and LSS pins: -4 to 6.5 V; (10)CSO, VDSTH pins -0.3 to 6.5; (11)VDRAIN pin: 55 V; (12)Operating Temperature Range (K)TA: -40 to 135 ℃; (13)Junction Temperature TJ: 150 ℃; (14)Storage Temperature Range TS: -55 to 150 ℃.

Features

A3931KJPT features: (1)High current 3-phase gate drive for N-channel MOSFETs; (2)Synchronous rectification; (3)Cross-conduction protection; (4)Charge pump and top-off charge pump for 100% PWM; (5)Integrated commutation decoder logic; (6)Operation over 5.5 to 50 V supply voltage range; (7)Extensive diagnostics output; (8)Provides +5 V Hall sensor power; (9)Low-current sleep mode.

Diagrams