AUIPS7145RTRL

th February, 10 2012 Automotive grade AUIPS7145R 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 current ESD protection Optimized Turn On/Off for EMI Rds(on) 100m max. Vclamp 65V Current shutdown 20A min. Applications Packages 21W Filament lamp Solenoid 24V loads for trucks Description The AUIPS7145R 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. The over-current shutdown is higher than inrush current of the lamp. DPak 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 AUIPS7145R Qualification Information† Qualification Level Moisture Sensitivity Level Machine Model ESD Human Body Model Charged Device Model IC Latch-Up Test RoHS Compliant † †† 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. DPAK-5L MSL1, 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) Class II, 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 AUIPS7145R 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=50°C/W DPack 6cm² footprint Maximum operating junction temperature Maximum storage junction temperature Vcc-60 Vcc+0.3 30 2.3 -16 60 -50 10 50 Pd Tj max. Max. -40 -55 2.5 150 150 Typ. Max. Units V A V mA V W °C Thermal Characteristics Symbol Parameter Rth1 Rth2 Rth3 Thermal resistance junction to ambient DPak Std footprint Thermal resistance junction to ambient Dpak 6cm² footprint Thermal resistance junction to case Dpak 70 50 4 Units °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=50°C/W, Dpak 6cm² footprint Ifb resistor RIfb www.irf.com Min. Max. Units A 2.1 1.5 k 3 AUIPS7145R Static Electrical Characteristics Tj=-40°C..150°C, Vcc=6-50V (unless otherwise specified) 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 4.7 0.9 0.75 m µA mA V 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) 20 2.2 165 25 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) 35 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 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 165°C IN www.irf.com IFB OUT 5 AUIPS7145R 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 AUIPS7145R 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 AUIPS7145R 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 AUIPS7145R 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 AUIPS7145R 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 AUIPS7145R 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 AUIPS7145R Case Outline 5 Lead – DPAK www.irf.com 12 AUIPS7145R Tape & Reel www.irf.com 5 Lead – DPAK 13 AUIPS7145R Part Marking Information Ordering Information Base Part Number Standard Pack Package Type Complete Part Number Form Tube AUIPS7145R www.irf.com D-Pak-5-Lead Quantity 75 AUIPS7145R Tape and reel 2000 AUIPS7145RTR Tape and reel left 3000 AUIPS7145RTRL Tape and reel right 3000 AUIPS7145RTRR 14 AUIPS7145R 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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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 AUIPS7145R Revision History Revision A1 A2 A3 B C www.irf.com Date Notes/Changes 12/11/2009 10/03/2010 20/04/2010 26/08/2011 10/02/2012 First release Add tri-temp DR3 release Add Vil max page 4 Update storage temperature page 3 16