LV8907UW - Sensor-less Three-phase Brushless DC …

1 Semiconductor Components Industries, LLC, 2016 June, 2018 Rev. 11 Publication Order Number: LV8907UW /DLV8907 UWSensor- less three -phaseBrushless DC MotorController, with GateDrivers, for AutomotiveOverviewThe LV8907 is a high performance, AEC Q100 qualified, sensor less three phase BLDC motor controller with integrated gatedrivers for driving external N MOSFETs. An on chip two stagecharge pump provides required gate voltage for a wide range of lowRDS(ON) type external N MOSFETs. The device offers a rich set ofsystem protection and diagnostic functions such as over current,over voltage, short circuit, under voltage, over temperature andmany more.

2 It supports open loop as well as closed loop speedcontrol with user configurable startup, speed setting andproportional/integral (PI) control coefficients, making it suitable for awide range of motor and load combinations. With a built in linearregulator for powering external circuits, a watchdog timer, and a LIN(Local Interconnect Network) transceiver, the LV8907 offers a verysmall system LV8907 stores system parameters in embedded one timeprogrammable (OTP) non volatile memory in addition to RAMsystem memory. An SPI interface is provided for parameter settingand monitoring the system status.

3 With the operating junctiontemperature tolerance up to 175 C and electrically LIN compatiblecontrol signals (PWM and Enable), the LV8907 is an ideal solution forstand alone BLDC motor control AEC Q100 Qualified and PPAP Capable Operating Junction Temperature Up to 175 C Operating Voltage Range from V to 20 V with Tolerance V to 40 V Embedded Proprietary sensor less Trapezoidal andPseudo sinusoidal Commutation Supports Open loop as well as Closed loop Speed Control Integrated Gate Drivers for Driving Six N MOSFETs Two stage Charge Pump for Continuous 100% Duty CycleOperation 5 V V Regulator, LIN Transceiver and Watchdog TimerApplications Using an External Microcontroller.

4 Configurable Speed Settings and PI Control Coefficients Various System Protection Features Including: Shoot through Protection Using Configurable Dead time Drain source Short Detection Cycle by cycle Current Limit and Over current Shutdown Over voltage and Under voltage Shutdown Over temperature Warning and Shutdown Input PWM Fault DetectionDevicePackageShipping ORDERING INFORMATIONLV8907 UWR2 GSQFP48K2500 / Tape & For information on tape and reel specifications,including part orientation and tape sizes, pleaserefer to our Tape and Reel Packaging SpecificationBrochure.

5 BRD8011 7x7 CASE 131 ANLV8907 YMALNY= Production YearM= Production MonthA= Assembly Start WeekLN = Lot NumberTypical Applications Automotive Pumps (Fuel, Oil, and Hydraulic) Fans (HVAC, Radiator, Battery Cooling, LED Headlight Cooling) White Goods and Industrial BLDC Motor BLOCK DIAGRAMF igure 1. LV8907 Block DiagramMOSFETPre driverOrGate DriverCharge Pump+ + VDSM onitorVSProtectionLogicInternalRegulator SystemRegistersLINT ransceiver /PWM InputVoltageMonitorLV8907200 mV100 mV5V/ LogicWatchdogTimer+ VSCHPVGLS ystemControlandSensor lessCommutationOTPOSCBack EMFD etectionCSBSCLKSISODIAGPWMINV3 RIVCCLIN_PWMINFGENTXDRXDV3 ROWAKETESTAGNDPGNDLGNDTHUHVHWHUOUTVOUTWO UTULVLWLRFRFSENSSULSVLSWLCOMCP2 PCP2 NCP1 PCP1 NVGLVS BLOCK DIAGRAMSF igure 2.

6 Example of Standalone ConfigurationKeyPWMINVBAT+LV8907 CSBSCLKSISODIAGPWMINV3 RIVCCLIN_PWMINFGENTXDRXDV3 ROWAKEUHVHWHUOUTVOUTWOUTULVLWLRFRFSENSSU LSVLSWLCOMTESTCP2 PCP2 NCP1 PCP1 NVGLVSCHPV3 ROTHAGNDPGNDLGNDF igure 3. Example of LIN Based Control ConfigurationVBATKeyLINMCULV8907 CSBSCLKSISODIAGPWMINV3 RIVCCLIN_PWMINFGENTXDRXDV3 ROWAKETESTCP2 PCP2 NCP1 PCP1 NVGLVSCHP+ ASSIGNMENTSF igure 4. LV8907 PinoutLV8907 VCCRXDTXDPWMINAGNDNCCSBSCLKSISOFGDIAGTES TLGNDNCNCLIN_PWMINTHNCRFSENSNCNCRFCOMUHU OUTULSULVHVOUTVLSVLWHWOUTWLSWLV3 RIV3 ROENWAKEVSCP2 NCP2 PCP1 PCP1 NCHPVGLPGNDSQFP48K(7x7)7mm x 7mm113253624124837 PIN DESCRIPTIONPin NamePin NoDescriptionPageVCC15 V or V regulator output pin.

7 (Selected by internal register setting)Power supply for microcontroller. Connect capacitor to AGND for stability15 RXD2 Open drain logic level output of LIN_PWMIN received data. Use pull-up to avoltage less than or equal to VS17 TXD3 Logic level input of transmit data for LIN_PWMIN17 PWMIN4 Digital level PWM input pin for direct drive or speed register selection polarity can be programmed for either active high or active low16 AGND5 Analog GND pinNC6, 14, 16,18, 21, 23No ConnectionsCSB7 Active low SPI interface chip selection pin20 SCLK8 SPI interface clock input pin20SI9 Active high SPI interface serial data input pin20SO10 Open drain SPI interface serial data output pin20FG11 Open drain back EMF transition output pin.

8 The frequency division ratio isselectable via register settings18 DIAG12 Programmable open drain diagnostic output17 LGND13 LIN Block GND pin. Must be connected to AGND on the PCBLIN_PWMIN15 LIN transceiver input/output. Register selectable as high voltage PWM inputwith a VVS/2 threshold17 TEST17 Factory test pin. Connect to GNDTH19 Thermistor input pin for power stage temperature detection. If the inputvoltage is below the threshold voltage, an error is triggered. The errorthreshold is programmable. To disable tie to V3RO18 RFSENS20 Shunt resistance reference pin. Connect this pin to the GND side of theShunt resistor with Kelvin DESCRIPTIONPin NamePageDescriptionPin NoRF22 Output current detect pin.

9 Connect this pin to higher terminal of the shuntresistor with Kelvin leads18 COM24 COM input pin. Connect this pin to the motor neutral point if available. Thispoint may be derived from a resistive network with 1k resistors to the phases13 SULSVLSWL332925 Current return path for low side gate drive. Short circuit shutoff level is mea-sured between this pin and its corresponding phase pin17 ULVLWL343026 Gate driver output pin for the low side Nch Power FET. Use gate resistorsfor wave shaping17 UOUTVOUTWOUT353127 Current return path for high side gate drive and reference for high sideshort circuit shut off17 UHVHWH363228 Gate driver output pin for the high side Nch Power FET.

10 Use gate resistorsfor wave shaping17 PGND37 GND pin for the charge pumpVGL38 Power supply pin for low side gate drive. Connect decoupling capacitorbetween this pin and GND15 CHP39 Power supply pin for high side gate drive. Connect decoupling capacitorbetween this pin and VS15CP1N40 Charge transfer pin of the Charge pump (1N). Connect capacitor betweenCP1P and CP1N15CP1P41 Charge transfer pin of the Charge pump (1P). Connect capacitor betweenCP1P and CP1N15CP2P42 Charge transfer pin of the Charge pump (2P). Connect capacitor betweenCP2P and CP2N15CP2N43 Charge transfer pin of the Charge pump (2N).