N-Channel Half-Bridge Driver

1 Si9976 vishay SiliconixDocument Number: 70016S-40757 Rev. F, Half-Bridge DriverFEATURESAPPLICATIONSDS ingle Input for High-Side and Low-Side MOSFETsD20- to 40-V SupplyDStatic (dc) OperationDCross-Conduction ProtectedDUndervoltage LockoutDESD and Short Circuit ProtectedDFault FeedbackDPower SuppliesDMotor DrivesDOffice AutomationDComputer PeripheralsDIndustrial ControllersDRoboticsDMedical EquipmentDESCRIPTIONThe Si9976 is an integrated Driver for an N-Channel MOSFET Half-Bridge . Schmitt trigger inputs provide logic signalcompatibility and hysteresis for increased noise immunity.

2 Aninternal low-voltage regulator allows the device to be powereddirectly from a system supply of 20 to 40 volts. Both half -bridgen- channel gates are driven directly with low-impedanceoutputs. Addition of one external capacitor allows an internalcircuit to level shift both the power supply and logic signal forthe Half-Bridge high-side N-Channel gate drive. An internalcharge pump replaces leakage current lost in the high-sidedriver circuit to provide static (dc) operation in any outputcondition.

3 Protection features include an undervoltagelockout, cross-conduction prevention logic, and a short Si9976 is available in both standard and lead (Pb)-free,14-pin SOIC (surface mount) packages, specified to operateover the industrial ( 40 to 85_C) temperature BLOCK DIAGRAMV+INENGNDVDDVCCFAULTRSQVDDCAPS1G2 G1V+ mF34785610213129 LITTLE FOOTB ootstrapRegulatorHalf-BridgeOutputUnder VoltageLockout 2 ChargePumpUnder VoltageLockout 1 Short Circuit& UVL Detect250 nsDelay300 nsDelaySubstrateEnable LatchLow VoltageRegulatorEnd of Life.

4 Last Available Purchase Date is 31-Dec-2014Si9976 vishay Number: 70016S-40757 Rev. F, 19-Apr-04 ABSOLUTE MAXIMUM RATINGSV oltage on IN, EN (pins 5, 6) with respect to ground to VDD + V.. Voltage on VCC (pin 7) to +18 V.. Voltage on V+, S1 (pins 3, 13) to +50 V.. Voltage on CAP, G1a (pins 2, 12) to +60 V.. Peak Output A.. Operating Temperature (TA) 40 to 85_C.. Storage Temperature 50 to 150_C.. Maximum Junction Temperature (TJ)125_C.. Power Dissipationb 1 W.

5 QJA 100_C/Wb.. generated voltage for reference 10 mW/_C above board mounted with no forced air ConditionsUnlessOtherwise SpecifiedLimitsD Suffix 40 to 85_CParameterSymbolV+ = 20 to 40 VTA = Operating Temperature RangeMincTypbMaxcUnitInputInput Voltage High (EN and IN) Voltage Low (EN and IN) Hysteresis Current Input Voltage HighIINH(EN and IN) VIN = 15 V1mAInput Current Input Voltage LowIINL(EN and IN)

6 VIN = 0 V 1mAOutputOutput Voltage High, G1dVS1 = V+, IOUT = 10 mA1012 Output Voltage High, G2eVOUTHS1 = GND, IOUT = 10 mA1215 Output Voltage Low, G1 and G2 VOUTLS1 = GND, IOUT = 60 Output Voltage HighVOHVCC = V, IOUT = Output Voltage LowVOLVCC = V, IOUT = Lockout 1 UVL111 Undervoltage Lockout 2 UVL214 Capacitor VoltagegVCAPV+ = 40V55 Capacitor CurrentICAPS1 = GND, VCAP = 0 V 10mACapacitor CurrentICAPS1 = GND, VCAP = 9 V 2mASupplyV+ Supply Range2040VV+ Supply CurrentI+ (H)G2 High, No + Supply CurrentI+ (L)G2 Low, No Load, S1 = Supply Supply CurrentICCVCC = V10mAVDD Supply SiliconixDocument Number: 70016S-40757 Rev.

7 F, Suffix 40 to 85_CTest ConditionsUnlessOtherwise SpecifiedParameterUnitMaxcTypbMincV+ = 20 to 40 VTA = Operating Temperature RangeSymbolDynamicPropogation Delay TimetG1350 Propogation Delay TimeLow to High LeveltPLH50% IN to VOUT = 5 V, CL = 600 pFG2400 Propogation Delay TimetPHL50% IN to VOUT = 5 V, CL = 600 pFG1150 Propogation Delay TimeHigh to Low LeveltPHLG250 Propogation Delay Time, Low to High Lev-el, Enable-to-Fault Output50% IN to FAULT = 2 V, S1 shorted to GND or V+500nsOutput Rise Time (G1, G2)tr1 to 10 V, CL = 600 pf110 Output Fall Time (G1, G2)

8 Tf10 to 1 V, CL = 600 pf50 Short Circuit Pulse WidthtSC50% to 50% of to PROCESS OPTION FLOWCHART for additional values are for DESIGN AID ONLY, not guaranteed nor subject to production algebraic convention whereby the most negative value is a minimum and the most positive a supply the output current of 10 mA on a dc basis, an external 13-V supply must be connected between the CAP pin and the S1 pin with the negative terminalof the supply connected to S1. This is not needed in an actual application because output currents are supplied by the CBOOT capacitor.

9 Voltage specified withrespect to V+. testing purposes, the 10-mA load current must be supplied by an external current source to the VDD pin to avoid pulling down the VDD generated voltage for reference = (V+) + (VDD)TRUTH TABLEENINC onditionFAULT OUTPUTG1 OUTG2 OUT10 Normal Operation0 LowHigh11 Normal Operation0 HighLow0 XDisabledXaLowLow10 Load Shorted to V+1bLowLow11 Load Shorted to Ground1bLowLow11 Undervoltage on CBOOT0 LowLow10 Undervoltage on CBOOT0 LowHighXXUndervoltage on output retains previous state until ENABLE rising FAULT condition, reset by ENABLE rising is an internally generated low-voltage +G1 VDDNCINENVCCGNDG2 FAULTTop View1112131423418910567Si9976 vishay Number: 70016S-40757 Rev.

10 F, 19-Apr-04 PIN CONFIGURATION AND ORDERING INFORMATIONORDERING INFORMATIONPart NumberTemperature RangePackageSi9976 DYSi9976DY-T1 40 to 85_CSOIC-14Si9976DY-T1 E3 PIN DESCRIPTIONPin 1No 2: CAPC onnection for the positive terminal of the bootstrap capacitorCBOOT. A CBOOT capacitor can be used for 3: V+This is the only external power supply required for the Si9976,and must be the same supply used to power the Half-Bridge itis driving. The Si9976 powers it s low-voltage logic, low-sidegate Driver , and bootstrap/charge pump circuits fromself-contained voltage regulators which require only abootstrap capacitor on the CAP pin and a bypass capacitor onthe VDD voltage sensing circuitry monitors V+ directly.