A3931KJP-T

A3931KJP-T Datasheet

A3930 and A3931 Automotive 3-Phase BLDC Controller and MOSFET Driver

Part	Datasheet
A3931KJP-T	A3931KJP-T (pdf)

Related Parts	Information
A3930KJP-T	A3930KJP-T

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A3930 and A3931 Automotive 3-Phase BLDC Controller and MOSFET Driver High current 3-phase gate drive for N-channel MOSFETs Synchronous rectification Cross-conduction protection Charge pump and top-off charge pump for 100% PWM Integrated commutation decoder logic Operation over to 50 V supply voltage range Extensive diagnostics output Provides +5 V Hall sensor power Low-current sleep mode Package 48 Lead LQFP with exposed thermal pad suffix JP Approximate Scale 1:1 TheA3930 andA3931 are 3-phase brushless DC BLDC motor controllers for use with N-channel external power MOSFETs. They incorporate 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 device to operate with a reduced gate drive at battery voltages down to 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. Internal fixed-frequency PWM current control circuitry can be used to regulate the maximum load current. The peak load current limit is set by the selection of an input reference voltage and external sensing resistor. The PWM frequency is set by a user-selected external RC timing network. For added flexibility, the PWM input can be used to provide speed and Continued on the next A3930 and A3931 Automotive 3-Phase BLDC Controller and MOSFET Driver Description continued torque control, allowing the internal current control circuit to set the maximum current limit. Efficiency is enhanced by using synchronous rectification. The power FETs are protected from shoot-through by integrated crossover control with dead time. The dead time can be set by a single external resistor. The A3930 and A3931 only differ in their response to the all-zero combination on the Hall inputs. In this state, the A3930 indicates a logic fault, but the A3931 pre-positions the motor in an unstable starting position suitable for start-up algorithms in microprocessordriven “sensor-less” control systems. Both devices are supplied in a 48-pin LQFP with exposed thermal pad. This is a small footprint 81 mm2 power package, that is lead Pb free, with 100% matte tin leadframe plating. Selection Guide Part Number A3930KJPTR-T A3931KJPTR-T Option Hall short detection Pre-positioning Packing 1500 pieces/reel 1500 pieces/reel Terminals 48 Package LQFP surface mount Absolute Maximum Ratings Parameter Load Supply Voltage Logic Input/Output Voltage Output Voltage Range Operating Temperature Range K Junction Temperature Transient Junction Temperature Storage Temperature Range ESD Rating, Human Body Model ESD Rating, Charged Device Model Conditions VBB VRESET VBB pin RESET pin input Remaining logic pins VGHx VGLx VCx VSx GHA, GHB, and GHC pins GLA, GLB, and GLC pins CA, CB, and CC pins SA, SB, and SC pins CSP, CSN, and LSS pins CSO, VDSTH pins VDRAIN pin Overtemperature event not exceed- ing 1 s, lifetime duration not exceeding 10 hr guaranteed by design characterization TS AEC-Q100-002, all pins except CP1 AEC-Q100-002, pin CP1 AEC-Q100-011, all pins Rating to 50 to 6 to 7 VSx to VSx+ 15 to 16 VSx+ 15 to 55 to 55 to 150 to 150 2000 1000 1050 Units V °C °C °C V Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. A3930 and A3931

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A3930 and A3931 Automotive 3-Phase BLDC Controller and MOSFET Driver

High current 3-phase gate drive for N-channel MOSFETs Synchronous rectification Cross-conduction protection Charge pump and top-off charge pump for 100% PWM Integrated commutation decoder logic Operation over to 50 V supply voltage range Extensive diagnostics output Provides +5 V Hall sensor power Low-current sleep mode

Package 48 Lead LQFP with exposed thermal pad suffix JP

Approximate Scale 1:1

TheA3930 andA3931 are 3-phase brushless DC BLDC motor controllers for use with N-channel external power MOSFETs. They incorporate 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 device to operate with a reduced gate drive at battery voltages down to 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. Internal fixed-frequency PWM current control circuitry can be used to regulate the maximum load current. The peak load current limit is set by the selection of an input reference voltage and external sensing resistor. The PWM frequency is set by a user-selected external RC timing network. For added flexibility, the PWM input can be used to provide speed and

Continued on the next

A3930 and A3931

Automotive 3-Phase BLDC Controller and MOSFET Driver

Description continued torque control, allowing the internal current control circuit to set the maximum current limit. Efficiency is enhanced by using synchronous rectification. The power FETs are protected from shoot-through by integrated crossover control with dead time. The dead time can be set by a single external resistor. The A3930 and A3931 only differ in their response to the all-zero
combination on the Hall inputs. In this state, the A3930 indicates a logic fault, but the A3931 pre-positions the motor in an unstable starting position suitable for start-up algorithms in microprocessordriven “sensor-less” control systems. Both devices are supplied in a 48-pin LQFP with exposed thermal pad. This is a small footprint 81 mm2 power package, that is lead Pb free, with 100% matte tin leadframe plating.

Selection Guide Part Number

A3930KJPTR-T A3931KJPTR-T

Option Hall short detection Pre-positioning

Packing 1500 pieces/reel 1500 pieces/reel

Terminals 48

Package LQFP surface mount

Absolute Maximum Ratings Parameter

Load Supply Voltage Logic Input/Output Voltage

Output Voltage Range

Operating Temperature Range K Junction Temperature Transient Junction Temperature Storage Temperature Range ESD Rating, Human Body Model ESD Rating, Charged Device Model

Conditions

VBB VRESET

VBB pin RESET pin input Remaining logic pins

VGHx VGLx VCx VSx

GHA, GHB, and GHC pins GLA, GLB, and GLC pins CA, CB, and CC pins SA, SB, and SC pins CSP, CSN, and LSS pins

CSO, VDSTH pins

VDRAIN pin

Overtemperature event not exceed-
ing 1 s, lifetime duration not exceeding 10 hr guaranteed by design
characterization

TS AEC-Q100-002, all pins except CP1

AEC-Q100-002, pin CP1

AEC-Q100-011, all pins

Rating to 50 to 6 to 7 VSx to VSx+ 15 to 16 VSx+ 15 to 55 to 55 to 150
to 150 2000 1000 1050

Units V °C °C
°C V

Allegro MicroSystems, LLC
115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

A3930 and A3931

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Datasheet ID: A3931KJP-T 516023