August, 27th 2009 Automotive grade AUIPS7121R CURRENT SENSE HIGH SIDE SWITCH Features • • • • • • • Product Summary Suitable for 24V systems Over current shutdown Over temperature shutdown Current sensing Active clamp Optimized Turn On/Off for EMI Reverse battery protection (Mosfet on) Rds(on) 30mΩ max. Vclamp 65V Current shutdown 50A min. Applications • • • 75W Filament lamp Solenoid 24V loads for trucks Packages Description The AUIPS7121R is a fully protected five 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. 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. The over-current shutdown is higher than inrush current of the lamp. DPak Typical Connection Vcc IN AUIPS7121R Battery Ifb Current feeback Input On Off www.irf.com Out 10k Load Rifb Logic Ground Power Ground Subject to change without notice 1 AUIPS7121R 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 † †† 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 AUIPS7121R Absolute Maximum Ratings Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. (Tambient=25°C unless otherwise specified). Symbol Parameter Min. Vout Vcc-Vin max. Iifb, max. Vcc sc Maximum output voltage Maximum Vcc voltage Maximum feedback current Maximum Vcc voltage with short circuit protection see page 7 Maximum power dissipation (internally limited by thermal protection) Rth=50°C/W DPack 6cm² footprint Max. storage & operating junction temperature Vcc-60 Vcc+0.3 -32 60 -50 10 ⎯ 50 Pd Tj max. ⎯ Max. Units V V mA V W -40 2.5 150 °C Typ. Max. Units 70 50 2 ⎯ ⎯ ⎯ °C/W Min. Max. Units ⎯ 3.8 1.5 ⎯ 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 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 A kΩ 3 AUIPS7121R Static Electrical Characteristics Tj=25°C, Vcc=28V (unless otherwise specified) Symbol Parameter Min. Typ. Max. ⎯ 60 Operating voltage range 6 ⎯ 24 30 ON state resistance Tj=25°C ⎯ ON state resistance Tj=150°C(2) 45 55 ⎯ 2 4 Icc off Supply leakage current ⎯ Iout off Output leakage current 2 4 Iin on Input current when device on 1 2.5 4 ⎯ V clamp1 Vcc to Vout clamp voltage 1 60 64 V clamp2 Vcc to Vout clamp voltage 2 60 65 72 ⎯ 3.5 5.9 Vih(1) High level Input threshold voltage ⎯ Vil(1) Low level Input threshold voltage 1.5 3.2 ⎯ Rds(on) rev Reverse On state resistance Tj=25°C 25 40 ⎯ Vf Forward body diode voltage Tj=25°C 0.75 0.85 ⎯ Forward body diode voltage Tj=125°C 0.62 0.7 Rin Input resistor 180 250 350 (1) Input thresholds are measured directly between the input pin and the tab. Vcc op. Rds(on) Units Test Conditions V mΩ µA mA V mΩ V Ids=2A Vin=Vcc=28V,Vifb=Vgnd Vout=Vgnd Vcc-Vin=28V Id=10mA Id=20A see fig. 2 Id=10mA Isd=2A If=3A Ω Switching Electrical Characteristics Vcc=28V, Resistive load=6.8Ω, Tj=25°C Symbol Parameter tdon tr tdoff tf Turn on delay time Rise time from 20% to 80% of Vcc Turn off delay time Fall time from 80% to 20% of Vcc Min. Typ. Max. 6 5 25 6 15 10 50 15 30 30 100 30 Units Test Conditions µs See fig. 1 µs Protection Characteristics Tj=25°C, Vcc=28V (unless otherwise specified) Symbol Parameter Min. Typ. Max. Units Tsd Isd I fault Over temperature threshold(2) Over-current shutdown Ifb after an over-current or an overtemperature (latched) 150 50 2.7 165 60 3.3 ⎯ 80 4 °C A Min. Typ. Max. 7050 -5% -0.6 0 8500 0 0 10 9950 +5 0.6 100 mA Test Conditions See fig. 3 and fig. 11 See fig. 3 and page 7 See fig. 3 Current Sensing Characteristics Tj=25°C, Vcc=28V (unless otherwise specified), 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 (2) Guaranteed by design www.irf.com Units Test Conditions % A µA Iload=5A Tj=-40°C to +150°C Iout<5A Iout=0A 4 AUIPS7121R Lead Assignments 3- Vcc 1- NC 2- In 3- Vcc 4- Ifb 5- Out 12 45 DPak Functional Block Diagram All values are typical VCC Charge Pump 3V 75V 1.5mA 60V 75V + - Driver Reset Set 250Ω Iout > 60A Latch 75V Q Reverse Battery Protection Diag + Tj > 165°C IN www.irf.com IFB OUT 5 AUIPS7121R 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 is too high 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 = 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. 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. www.irf.com 6 AUIPS7121R 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 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 www.irf.com 7 AUIPS7121R T clamp 80% Vcc-Vin Vcc-Vin 20% Ids 80% Vcc Vout 20% Td on Td off Tf Tr Vds Vds clamp 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) 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 AUIPS7121R 6 4 VIH 5 Iccoff, supply current (µA) VIL Vih and Vil (V) 4 2 3 2 1 0 0 0 10 20 30 40 -50 50 -25 Vcc-Vin, supply voltage (V) 25 50 75 100 125 150 Tj, junction temperature (°C) Figure 5 – Icc off(µA) Vs Vcc-Vin (V) Figure 6 – Vih and Vil (V) Vs Tj (°C) Zth, transient thermal impedance (°C/W) 100.00 200% 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) 9 AUIPS7121R 1.4 Ifb, current feedback current (mA) Max. output current (A) 100 10 1 1.E+01 1.E+02 1.E+03 1.E+04 Inductance (µH) 1.2 25°C 1.0 0.8 150°C 0.6 0.4 0.2 0.0 0 2 4 6 8 10 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 10 20 30 40 50 Iout, output current (A) Figure 11 – Tsd (s) Vs I out (A) SMD with 6cm² www.irf.com 10 AUIPS7121R Case Outline 5 Lead – DPAK www.irf.com 11 AUIPS7121R Tape & Reel www.irf.com 5 Lead – DPAK 12 AUIPS7121R Part Marking Information Ordering Information Base Part Number Standard Pack Package Type Complete Part Number Form Tube AUIPS7121R D-Pak-5-Lead Quantity 75 AUIPS7121R Tape and reel 3000 AUIPS7121RTR Tape and reel left 2000 AUIPS7121RTRL Tape and reel right 2000 AUIPS7121RTRR The information provided in this document is believed to be accurate and reliable. However, International Rectifier assumes no responsibility for the consequences of the use of this information. International Rectifier assumes no responsibility for any infringement of patents or of other rights of third parties which may result from the use of this information. No license is granted by implication or otherwise under any patent or patent rights of International Rectifier. The specifications mentioned in this document are subject to change without notice. This document supersedes and replaces all information previously supplied. For technical support, please contact IR’s Technical Assistance Center http://www.irf.com/technical-info/ WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245 Tel: (310) 252-7105 www.irf.com 13