November, 14th 2011 Automotive grade AUIPS71451G CURRENT SENSE HIGH SIDE SWITCH Features Product Summary Suitable for 24V systems Over current shutdown Over temperature shutdown Current sensing Active clamp Reverse circulation immunization Low quiescent current ESD protection Optimized Turn On/Off for EMI Lead-free, halogen-free, RoHS Compliant Automotive qualified Rds(on) 100m max. Vclamp 65V Current shutdown 4A min. Packages Applications Solenoid 24V loads for trucks Description The AUIPS71451G is a fully protected four terminal high side switch specifically designed for driving lamp. It features current sensing, over-current, over-temperature, ESD protection and drain to source active clamp. The Ifb pin is used for current sensing. SO8 Typical Connection Vcc IPS IN Battery Ifb Current feeback Input On Off www.irf.com Out 10k Load 2.5k Logic Ground Power Ground 1 AUIPS71451G Qualification Information† Automotive †† (per AEC-Q100 ) Comments: This family of ICs has passed an Automotive qualification. IR’s Industrial and Consumer qualification level is granted by extension of the higher Automotive level. Qualification Level Moisture Sensitivity Level Machine Model ESD Human Body Model Charged Device Model IC Latch-Up Test RoHS Compliant † †† SOIC-8L MSL2, 260°C (per IPC/JEDEC J-STD-020) Class M2 (200 V) (per AEC-Q100-003) Class H1C (1500 V) (per AEC-Q100-002) Class C5 (1000 V) (per AEC-Q100-011) ClassII, Level A (per AEC-Q100-004) Yes Qualification standards can be found at International Rectifier’s web site http://www.irf.com/ Exceptions to AEC-Q100 requirements are noted in the qualification report. www.irf.com 2 AUIPS71451G Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. (Tj= -40°C..150°C, Vcc=6..50V unless otherwise specified). Symbol Parameter Min. Vout I rev Isd cont. Vcc-Vin max. Iifb, max. Vcc sc. Maximum output voltage Maximum reverse pulsed current (t=100µs) see page 8 Maximum diode continuous current Tambient=25°C, Rth=70°C/W Maximum Vcc voltage Maximum feedback current Maximum Vcc voltage with short circuit protection see page 8 Maximum power dissipation (internally limited by thermal protection) Rth=100°C/W Max. storage & operating junction temperature Vcc-60 Vcc+0.3 30 2.3 -16 60 -50 10 50 Pd Tj max. Max. Units V A V mA V W -40 1.25 150 °C Typ. Max. Units Thermal Characteristics Symbol Parameter Rth1 Thermal resistance junction to ambient SO8 100 °C/W Recommended Operating Conditions These values are given for a quick design. Symbol Parameter Iout Continuous output current, Tambient=85°C, Tj=125°C Rth=100°C/W Ifb resistor RIfb www.irf.com Min. Max. Units A 1.5 1.5 k 3 AUIPS71451G Static Electrical Characteristics Tj=-40°C..150°C, Vcc=6-50V (unless otherwise specified). Typical value are given for 28V and 25°C. Symbol Parameter Min. Typ. Vcc op. Rds(on) Operating voltage 6 ON state resistance Tj=25°C 75 ON state resistance Tj=150°C(2) 135 Icc off Supply leakage current 1 Iout off Output leakage current 1 I in on Input current while on 0.6 2 V clamp1 Vcc to Vout clamp voltage 1 60 64 V clamp2 Vcc to Vout clamp voltage 2 60 65 Vih(1) High level Input threshold voltage 3 Vil(1) Low level Input threshold voltage 1.5 2.3 Vf Forward body diode voltage Tj=25°C 0.8 Forward body diode voltage Tj=125°C 0.65 (1) Input thresholds are measured directly between the input pin and the tab. Max. Units 60 100 180 3 3 4 V 72 5 m µA mA V 0.9 0.75 Test Conditions Ids=2A Vin=Vcc / Vifb=Vgnd Vout=Vgnd, Tj=25°C Vcc-Vin=28V, Tj=25°C Id=10mA Id=6A see fig. 2 Id=10mA If=1A Switching Electrical Characteristics Vcc=28V, Resistive load=27 , Tj=25°C Symbol Parameter tdon tr tdoff tf Turn on delay time to 20% Rise time from 20% to 80% of Vcc Turn off delay time Fall time from 80% to 20% of Vcc Min. Typ. Max. 4 2 20 2.5 10 5 40 5 20 10 80 10 Min. Typ. Max. 150(2) 4 2.2 165 7 3 Units Test Conditions µs See fig. 1 µs Protection Characteristics Tj=-40°C..150°C, Vcc=6-50V (unless otherwise specified) Symbol Parameter Tsd Isd I fault Over temperature threshold Over-current shutdown Ifb after an over-current or an overtemperature (latched) 10 5 Units °C A mA Test Conditions See fig. 3 and fig.11 See fig. 3 and page 7 See fig. 3 Current Sensing Characteristics Tj=-40°C..150°C, Vcc=6-50V (unless otherwise specified). Specified 500µs after the turn on. Vcc-Vifb>4V. Typical value are given for 28V and 25°C. Symbol Parameter Ratio I load / Ifb current ratio Ratio_TC I load / Ifb variation over temperature(2) I offset Load current offset Ifb leakage Ifb leakage current On in open load (2) Guaranteed by design www.irf.com Min. Typ. Max. Units 2000 -5% -0.02 0 2400 0 0 1 2800 +5 0.02 10 % A µA Test Conditions Iout<4A Tj=-40°C to +150°C Iout<4A Iout=0A, Vcc-Vin=28V 4 AUIPS71451G Lead Assignments Functional Block Diagram All values are typical VCC Charge Pump 3V 75V 1.5mA 60V 75V + - Driver Reset Set 100 Iout > 7A Latch 75V Q Diag + Tj > 165°C IN www.irf.com IFB OUT 5 AUIPS71451G Truth Table Op. Conditions Normal mode Normal mode Open load Open load Short circuit to GND Short circuit to GND Over temperature Over temperature Input H L H L H L H L Output L H L H L L L L Ifb pin voltage 0V I load x Rfb / Ratio 0V 0V 0V V fault (latched) 0V V fault (latched) Operating voltage Maximum Vcc voltage : this is the maximum voltage before the breakdown of the IC process. Operating voltage : This is the Vcc range in which the functionality of the part is guaranteed. The AEC-Q100 qualification is run at the maximum operating voltage specified in the datasheet. Reverse battery During the reverse battery the Mosfet is kept off and the load current is flowing into the body diode of the power Mosfet. Power dissipation in the IPS : P = I load * Vf There is no protection, so Tj must be lower than 150°C in the worst case condition of current and ambient temperature. If the power dissipation is too high in Rifb, a diode in serial can be added to block the current. The transistor used to pull-down the input should be a bipolar in order to block the reverse current. The 100ohm input resistor can not sustain continuously 16V (see Vcc-Vin max. in the Absolute Maximum Ratings section) Active clamp The purpose of the active clamp is to limit the voltage across the MOSFET to a value below the body diode break down voltage to reduce the amount of stress on the device during switching. The temperature increase during active clamp can be estimated as follows: Tj PCL Z TH ( t CLAMP ) Where: Z TH ( t CLAMP ) is the thermal impedance at tCLAMP and can be read from the thermal impedance curves given in the data sheets. PCL VCL ICLavg : Power dissipation during active clamp VCL 65V : Typical VCLAMP value. ICLavg t CL di dt ICL : Average current during active clamp 2 ICL : Active clamp duration di dt VBattery VCL : Demagnetization current L Figure 9 gives the maximum inductance versus the load current in the worst case : the part switches off after an over temperature detection. If the load inductance exceeds the curve, a free wheeling diode is required. www.irf.com 6 AUIPS71451G Over-current protection The threshold of the over-current protection is set in order to guarantee that the device is able to turn on a load with an inrush current lower than the minimum of Isd. Nevertheless for high current and high temperature the device may switch off for a lower current due to the over-temperature protection. This behavior is shown in Figure 11. Current sensing accuracy Ifb Ifb2 Ifb1 Ifb leakage I offset Iout1 Iout2 Iout The current sensing is specified by measuring 3 points : - Ifb1 for Iout1 - Ifb2 for Iout2 - Ifb leakage for Iout=0 The parameters in the datasheet are computed with the following formula : Ratio = ( Iout2 – Iout1 )/( Ifb2 – Ifb1) I offset = Ifb1 x Ratio – Iout1 This allows the designer to evaluate the Ifb for any Iout value using : Ifb = ( Iout + I offset ) / Ratio if Ifb > Ifb leakage For some applications, a calibration is required. In that case, the accuracy of the system will depends on the variation of the I offset and the ratio over the temperature range. The ratio variation is given by Ratio_TC specified in page 4. The Ioffset variation depends directly on the Rdson : I offset@-40°C= I offset@25°C / 0.8 I offset@150°C= I offset@25°C / 1.9 www.irf.com 7 AUIPS71451G Maximum Vcc voltage with short circuit protection The maximum Vcc voltage with short circuit is the maximum voltage for which the part is able to protect itself under test conditions representative of the application. 2 kind of short circuits are considered : terminal and load short circuit. L supply 5µH R supply 10mohm Vcc IPS Out Terminal SC Load SC L SC 0.1 µH 10 µH R SC 10 mohm 100 mohm L SC R SC Maximum current during reverse circulation In case of short circuit to battery, a voltage drop of the Vcc may create a current which circulate in reverse mode. When the device is on, this reverse circulation current will not trigger the internal fault latch. This immunization is also true when the part turns on while a reverse current flows into the device. The maximum current (I rev) is specified in the maximum rating section. www.irf.com 8 AUIPS71451G T clamp Vcc-Vin 80% Vcc-Vin 20% Ids 80% Vcc Vout 20% Td on Td off Tr Vds Vds clamp Tf See Application Notes to evaluate power dissipation Figure 2 – Active clamp waveforms Figure 1 – IN rise time & switching definitions Vin I shutdown Ids Tj Tshutdown Tsd 165°C V fault Vifb Icc off, supply leakage current (µA) 10 8 6 4 2 0 -50 0 50 100 150 Tj, junction temperature (°C) Figure 3 – Protection timing diagram www.irf.com Figure 4 – Icc off (µA) Vs Tj (°C) 9 AUIPS71451G 4 3 10 Vih and Vil (V) Icc, supply current (µA) 15 5 2 VIH 1 VIL 0 0 0 10 20 30 40 50 -50 60 -25 Vcc-Vout, supply voltage (V) 25 50 75 100 125 150 Tj, junction temperature (°C) Figure 5 – Icc off (µA) Vs Vcc-Vout (V) Figure 6 – Vih and Vil (V) Vs Tj (°C) 200% 100.00 Zth, transient thermal impedance (°C/W) Rds(on), Drain-to-Source On Resistance (Normalized) 0 10.00 150% 100% 50% -50 0 50 100 Tj, junction temperature (°C) Figure 7 - Normalized Rds(on) (%) Vs Tj (°C) www.irf.com 150 1.00 0.10 0.01 1.E05 1.E04 1.E03 1.E02 1.E- 1.E+0 1.E+0 1.E+0 01 0 1 2 Time (s) Figure 8 – Transient thermal impedance (°C/W) Vs time (s) 10 AUIPS71451G 6.0 Ifb, current feedback current (mA) Max. output current (A) 100 10 1 1.E+01 -40°C 5.0 25°C 4.0 3.0 150°C 2.0 1.0 0.0 1.E+02 1.E+03 1.E+04 1.E+05 Inductance (µH) 0 2 4 6 8 10 12 14 Iout, output current (A) Figure 9 – Max. Iout (A) Vs inductance (µH) Figure 10 – Ifb (mA) Vs Iout (A) 100 Tsd, time to shutdown(s) 10 1 0.1 0.01 '-40°C '+25°C 0.001 '+125°C 0.0001 0 5 10 15 20 Iout, output current (A) Figure 11 – Tsd (s) Vs I out (A) SMD with 6cm² www.irf.com 11 AUIPS71451G Case Outline - SO-8 www.irf.com 12 AUIPS71451G Tape & Reel - SO-8 www.irf.com 13 AUIPS71451G Part Marking Information Ordering Information Base Part Number Standard Pack Package Type Complete Part Number Form Tube AUIPS71451G www.irf.com SO8 Tape and reel Quantity 95 AUIPS71451G 2500 AUIPS71451GTR 14 AUIPS71451G IMPORTANT NOTICE Unless specifically designated for the automotive market, International Rectifier Corporation and its subsidiaries (IR) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or services without notice. Part numbers designated with the “AU” prefix follow automotive industry and / or customer specific requirements with regards to product discontinuance and process change notification. All products are sold subject to IR’s terms and conditions of sale supplied at the time of order acknowledgment. IR warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with IR’s standard warranty. Testing and other quality control techniques are used to the extent IR deems necessary to support this warranty. Except where mandated by government requirements, testing of all parameters of each product is not necessarily performed. IR assumes no liability for applications assistance or customer product design. Customers are responsible for their products and applications using IR components. To minimize the risks with customer products and applications, customers should provide adequate design and operating safeguards. Reproduction of IR information in IR data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alterations is an unfair and deceptive business practice. IR is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of IR products or serviced with statements different from or beyond the parameters stated by IR for that product or service voids all express and any implied warranties for the associated IR product or service and is an unfair and deceptive business practice. IR is not responsible or liable for any such statements. IR products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or in other applications intended to support or sustain life, or in any other application in which the failure of the IR product could create a situation where personal injury or death may occur. Should Buyer purchase or use IR products for any such unintended or unauthorized application, Buyer shall indemnify and hold International Rectifier and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that IR was negligent regarding the design or manufacture of the product. Only products certified as military grade by the Defense Logistics Agency (DLA) of the US Department of Defense, are designed and manufactured to meet DLA military specifications required by certain military, aerospace or other applications. Buyers acknowledge and agree that any use of IR products not certified by DLA as military-grade, in applications requiring military grade products, is solely at the Buyer’s own risk and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use. IR products are neither designed nor intended for use in automotive applications or environments unless the specific IR products are designated by IR as compliant with ISO/TS 16949 requirements and bear a part number including the designation “AU”. Buyers acknowledge and agree that, if they use any non-designated products in automotive applications, IR will not be responsible for any failure to meet such requirements. For technical support, please contact IR’s Technical Assistance Center http://www.irf.com/technical-info/ WORLD HEADQUARTERS: 101 N. Sepulveda Blvd., El Segundo, California 90245 Tel: (310) 252-7105 www.irf.com 15