November, 29th 2009 Automotive grade AUIPS7111S CURRENT SENSE HIGH SIDE SWITCH Features Product Summary Suitable for 24V systems Over current shutdown Over temperature shutdown Current sensing Active clamp Low current Reverse battery ESD protection Optimized Turn On/Off for EMI Rds(on) 7.5 m max. Vclamp 65V Current shutdown 30A min. Applications Package 24V loads for trucks Description The AUIPS7111S is a fully protected four terminal high side switch. It features current sensing, over-current, overtemperature, ESD protection and drain to source active clamp. When the input voltage Vcc - Vin is higher than the specified threshold, the output power Mosfet is turned on. When the Vcc - Vin is lower than the specified Vil threshold, the output Mosfet is turned off. The Ifb pin is used for current sensing. D²Pak-5 leads Typical Connection Vcc IPS IN Battery Out Ifb Current feeback Input On Off www.irf.com 10k Load Rifb Logic Ground Power Ground 1 AUIPS7111S 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 D2PAK-5L MSL1, 260°C (per IPC/JEDEC J-STD-020) Class M3 (300V) (per AEC-Q100-003) Class H2 (2,500 V) ESD Human Body Model (per AEC-Q100-002) Class C4 (1000 V) Charged Device Model (per AEC-Q100-011) Class II, Level A IC Latch-Up Test (per AEC-Q100-004) RoHS Compliant 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. Machine Model www.irf.com 2 AUIPS7111S Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. (Tj= -40°C..150°C, Vcc=8..50V unless otherwise specified). Symbol Parameter Vout Maximum output voltage Vcc-Vin max. Maximum Vcc voltage Ifb, max. Maximum feedback current Maximum power dissipation (internally limited by thermal protection) Pd Tambient=25°C, Tj=150°C Rth=50°C/W D²Pack 6cm² footprint Tj max. Max. storage & operating junction temperature Min. Max. Units Vcc-60 Vcc+0.3 -32 60 -50 10 V V mA W -40 2.5 150 °C Typ. Max. Units 60 40 0.8 °C/W Min. Max. Units 10 1.5 Thermal Characteristics Symbol Parameter Rth1 Rth2 Rth3 Thermal resistance junction to ambient D²Pak Std footprint Thermal resistance junction to ambient D²pak 6cm² footprint Thermal resistance junction to case D²pak Recommended Operating Conditions These values are given for a quick design. Symbol Parameter Iout Continuous output current, Tambient=85°C, Tj=125°C Rth=40°C/W, D²pak 6cm² footprint Rifb www.irf.com A k 3 AUIPS7111S Static Electrical Characteristics Tj=-40..150°C, Vcc=8..50V (unless otherwise specified) Symbol Parameter Min. Typ. Max. Units Operating voltage range 8 50 V ON state resistance Tj=25°C 6 7.5 m ON state resistance Tj=150°C 12 15 Icc off Supply leakage current 2 6 µA Iout off Output leakage current 2 6 V clamp1 Vcc to Vout clamp voltage 1 60 65 V clamp2 Vcc to Vout clamp voltage 2 66 V Vih(2) High level Input threshold voltage 5.5 6.8 Vil(2) Low level Input threshold voltage 3.5 5 Rds(on) rev Reverse On state resistance Tj=25°C 7 10 m Reverse On state resistance Tj=150°C 13 18 Vf Forward body diode voltage Tj=25°C 0.75 0.8 V Forward body diode voltage Tj=125°C 0.6 0.65 Rin Internal input resistor 180 250 350 (2) Input thresholds are measured directly between the input pin and the tab. See also page 6 Vcc op. Rds(on) Test Conditions Ids=10A Vin=Vcc=28V,Vifb=Vgnd Vout=Vgnd, Tj=25°C Id=10mA Id=10A see fig. 2 Id=10mA Isd=10A, Vcc-Vin=7..32V If=10A Tj=-40°C..125°C Switching Electrical Characteristics Vcc=28V, Resistive load=3, 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. 25 8 50 5 35 17 80 13 50 25 120 35 Units Test Conditions µs See fig. 1 µs Protection Characteristics Tj=-40..150°C, Vcc=8..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) Min. Typ. Max. Units 150(3) 30 2.4 165 45 4 °C A Min. Typ. Max. Units 11000 13000 -5% 0 -0.25 0 0 6 14500 +5 0.25 15 % A µA 60 6 mA Test Conditions See fig. 3 and fig. 10 See fig. 3 and page 7 See fig. 3 Current Sensing Characteristics Tj=-40..150°C, Vcc=8..50V (unless otherwise specified) Symbol Parameter Ratio I load / Ifb current ratio Ratio_TC I load / Ifb variation over temperature I offset Load current offset Ifb leakage Ifb leakage current on (3) Guaranteed by design www.irf.com Test Conditions Iout=10A Iout<10A Iout=0A, Tj=25°C 4 AUIPS7111S Lead Assignments 3- Vcc 1- In 2- Ifb 3- Vcc 4- Out 5- Out 12 45 D²Pak - 5 leads Functional Block Diagram All values are typical VCC 75V Charge Pump 3mA 58V 75V + - Driver 75V Reset Set Latch 250 Iout > 45A Q Reverse Battery Protection Diag + Tj > 165°C IN www.irf.com IFB OUT 5 AUIPS7111S 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 Ifb leakage x Rifb 0V I fault x Rifb (latched) 0V I fault x Rifb (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 turned on if the input pin is powered with a diode in parallel of the input transistor. Power dissipation in the IPS : P = Rdson rev * I load² + Vcc² / 250 ( internal input resistor ). If the power dissipation I too hight in Rifb, a diode in serial can be added to block the current. 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 39 V : Typical VCLAMP value I ICLavg CL : Average current during active clamp 2 ICL : Active clamp duration t CL di dt di VBattery VCL : Demagnetization current dt L Figure 9 gives the maximum inductance versus the load current in the worst case : the part switch off after an over temperature detection. If the load inductance exceed the curve, a free wheeling diode is required. www.irf.com 6 AUIPS7111S Input level VIH/VIL The input level are referenced to Vcc. When Vcc-Vin exceed VIH the part turns on and when Vcc-Vin goes below VIL the part turns off 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 of the Rdson : I offset@-40°C= I offset@25°C / 0.7 I offset@150°C= I offset@25°C / 1.9 Over-current protection The threshold of the over-current protection is set in order to guaranteed 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 (see Figure 10). www.irf.com 7 AUIPS7111S T clamp Vcc-Vin 80% Vcc-Vin 20% Ids 80% Vcc Vout 20% Td on Td off Vds Vds clamp Tf Tr 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) 30 25 20 15 10 5 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) 8 AUIPS7111S 5 6 5 4 Vih and Vil (V) Icc, supply current (µA) 4 3 2 1 VIH 3 VIL 2 1 0 0 0 10 20 30 40 -50 50 Vcc-Vout, supply voltage (V) 0 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% 100 150% 100% 50% -50 0 50 100 Tj, junction temperature (°C) Figure 7 - Normalized Rds(on) (%) Vs Tj (°C) www.irf.com 150 Zth, transient thermal impedance (°C/W) Rds(on), Drain-to-Source On Resistance (Normalized) -25 10 1 0.1 0.01 1E-4 1E-3 1E-2 1E-1 1E+0 1E+1 1E+2 Time (s) Figure 8 – Transient thermal impedance (°C/W) Vs time (s) 9 AUIPS7111S 100 Tsd, time to shutdown(s) Max. output current (A) 100 10 10 1 '-40°C '+25°C '+125°C 1 1.E+00 0.1 1.E+01 1.E+02 1.E+03 1.E+04 Inductance (µH) Figure 9 – Max. Iout (A) Vs inductance (µH) www.irf.com 0 10 20 30 40 Iout, output current (A) Figure 10 – Tsd (s) Vs I out (A) SMD with 6cm² 10 AUIPS7111S Case Outline D2PAK - 5 Leads www.irf.com 11 AUIPS7111S Tape & Reel D2PAK - 5 Leads www.irf.com 12 AUIPS7111S Part Marking Information Ordering Information Base Part Number Standard Pack Package Type Complete Part Number Form AUIPS7111R www.irf.com D2-Pak-5-Leads Quantity Tube 50 AUIPS7111S Tape and reel left 800 AUIPS7111STRL Tape and reel right 800 AUIPS7111STRR 13 AUIPS7111S 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. 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