The LV8968BB is a 3−phase BLDC/PMSM pre−driver with integrated BEMF (Back ElectroMotive Force) sensing and logic level FET compatibility. The wide operating voltage range and AEC−Q100 qualification make this device ideal for automotive applications. Six gate drivers provide 400 mA (typ) gate current to external power
bridges allowing use of low−resistance power FETs as well as logic level FETs. All FETs are protected against overcurrent, short−circuit, over−temperature and gate undervoltage. A multitude of protection and monitoring features make this device suitable for ISO26262 applications. Three independent low−side source pins allow multiple shunt measurement.
The device also includes a programmable linear regulator, a fast current−sense amplifier and a window watchdog for microcontroller support. The SPI interface allows for real time parameter setup and diagnostics. Critical system parameters can be programmed into non−volatile OTP memory.
Junction temperature tolerance up to 175°C and control via wide level WAKE and PWM signals make the LV8968BB an ideal motor pre−driver for automotive applications such as engine cooling fans, fuel, oil, and hydraulic pumps.
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Features |
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Full Drive Power from 8 V to 28 V Supply Voltage with Transient
Tolerance from 4.5 V to 40 V
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Extended Voltage Range from 6 V to 33 V Using Logic−level Mode
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Up to 25 kHz Motor PWM with Individual Six Gate Control or
Drive−3 Mode with Integrated Programmable Dead−Time
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5 V / 3.3 V Linear Regulator for External Loads up to 50 mA
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Extensive System Protection Features Including:
♦ Drain−Source Short Detection for External FET
♦ Overcurrent Shutoff
♦ Low Gate Voltage Warning
♦ Over−temperature Warning and Shutoff
♦ Over / Under Voltage Protection
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SPI Interface for Parameter Setup and Diagnostic Access, Dynamic
Access to Dead−Time, Amplifier Gain, and Short Circuit Levels
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Non−Volatile (OTP) Memory for Storing Critical System Parameters
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Wide Voltage Enable Line and PWM Interface
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Integrated Window Watchdog Timer Function
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AEC−Q100 Qualified and PPAP Capable
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Thermally Efficient Exposed Die 48 Pin SQFP Package for Transient
Operation Up to 175°C
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