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August, 27th 2009
Automotive grade
AUIPS7141R
CURRENT SENSE HIGH SIDE SWITCH
Features
* * * * * * * * * * * Suitable for 24V systems Over current shutdown Over temperature shutdown Current sensing Active clamp Low current ESD protection Optimized Turn On/Off for EMI 21W Filament lamp Solenoid 24V loads for trucks
Product Summary Rds(on) 100m max. Vclamp 65V Current shutdown 20A min.
Applications Packages
Description
The AUIPS7141R 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. 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 Ifb Current feeback Input
On Off
IPS
Battery Out
10k 2.5k Logic Ground Power Ground Load
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Subject to change without notice
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AUIPS7141R
Qualification Information
Qualification Level 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. MSL1, 260C (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
Moisture Sensitivity Level
DPAK-5L
Machine Model ESD Human Body Model Charged Device Model IC Latch-Up Test RoHS Compliant
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. Higher MSL ratings may be available for the specific package types listed here. Please contact your International Rectifier sales representative for further information.
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AUIPS7141R
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. (Tambient=25C unless otherwise specified).
Symbol
Vout Vcc-Vin max. Iifb, max. Vcc sc. Pd Tj max.
Parameter
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=50C/W DPack 6cm footprint Max. storage & operating junction temperature
Min.
Max.
Units
V V mA V W C
Vcc-60 Vcc+0.3 -16 60 -50 10 50
-40
2.5 150
Thermal Characteristics
Symbol
Rth1 Rth2 Rth3
Parameter
Thermal resistance junction to ambient DPak Std footprint Thermal resistance junction to ambient Dpak 6cm footprint Thermal resistance junction to case Dpak
Typ.
70 50 4
Max.

Units
C/W
Recommended Operating Conditions
These values are given for a quick design.
Symbol
Iout RIfb
Parameter
Continuous output current, Tambient=85C, Tj=125C Rth=50C/W, Dpak 6cm footprint Ifb resistor
Min.
Max.
2.1
Units
A k
1.5
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AUIPS7141R
Static Electrical Characteristics
Tj=25C, Vcc=28V (unless otherwise specified)
Symbol
Vcc op. Rds(on)
Parameter
Min.
Typ.
Max.
Units
V m A mA
Test Conditions
Ids=2A Vin=Vcc / Vifb=Vgnd Vout=Vgnd Vcc-Vin=28V Id=10mA Id=6A see fig. 2 Id=10mA If=1A
60 Operating voltage 6 75 100 ON state resistance Tj=25C ON state resistance Tj=150C(2) 135 180 1 3 Icc off Supply leakage current Iout off Output leakage current 1 3 I in on Input current while on 0.6 1.6 3 V clamp1 Vcc to Vout clamp voltage 1 60 64 V clamp2 Vcc to Vout clamp voltage 2 60 65 72 3 4.5 Vih(1) High level Input threshold voltage Vil(1) Low level Input threshold voltage 1.5 2.3 0.8 0.9 Vf Forward body diode voltage Tj=25C Forward body diode voltage Tj=125C 0.65 0.75 (1) Input thresholds are measured directly between the input pin and the tab.
V
Switching Electrical Characteristics
Vcc=28V, Resistive load=27, Tj=25C
Symbol
tdon tr tdoff tf
Parameter
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.
4 2 20 2.5
Typ.
10 5 40 5
Max.
20 10 80 10
Units
s
Test Conditions
See fig. 1
s
Protection Characteristics
Symbol
Tsd Isd I fault
Parameter
Over temperature threshold Over-current shutdown Ifb after an over-current or an overtemperature (latched)
Min.
150(2) 20 2.7
Typ.
165 25 3.3
Max.
Units
C A mA
Test Conditions
See fig. 3 and fig.11 See fig. 3 and page 6 See fig. 3
35 4
Current Sensing Characteristics
Symbol Parameter Min.
2000 -5% -0.2 0
Typ.
2400 0 0 8
Max.
2800 +5 0.2 100
Units
% A A
Test Conditions
Iload=2A Tj=-40C to +150C Iout<2A Iout=0A
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
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AUIPS7141R
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
3V 75V 1.5mA
Charge Pump
60V
75V
+ -
Driver
75V
Reset Set
Latch
Q
Iout > 25A 100
Diag
+
Tj > 165C
IN
IFB OUT
5
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AUIPS7141R
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 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 = ICL : Average current during active clamp 2
t CL =
di = dt
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.
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AUIPS7141R
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@-40C= I offset@25C / 0.8 I offset@150C= I offset@25C / 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 5H
R supply 10mohm
Vcc
IPS Out
L SC R SC
Terminal SC Load SC
L SC 0.1 H 10 H
R SC 10 mohm 100 mohm
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AUIPS7141R
T clamp
Vcc-Vin
80%
Vcc-Vin
20%
Ids
80%
Vcc
Vout
20%
Td on Tr
Td off Tf
Vds
Vds clamp
See Application Notes to evaluate power dissipation
Figure 1 - IN rise time & switching definitions
Figure 2 - Active clamp waveforms
10
Vin Ids
I shutdown
Icc off, supply leakage current (A)
8
6
4
Tj
Tsd 165C V fault
Tshutdown
2
Vifb
0 -50 0 50 100 150
Tj, junction temperature (C)
Figure 3 - Protection timing diagram
Figure 4 - Icc off (A) Vs Tj (C)
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AUIPS7141R
20
4
Icc, supply current (A)
1 5
3
Vih and Vil (V)
1 0
2
VIH
1
5
VIL
0
0 0 1 0 20 30 40 50
-50
-25
0
25
50
75
100 125 150
Vcc-Vout, supply voltage (V) Figure 5 - Icc off (A) Vs Vcc-Vout (V)
Tj, junction temperature (C) Figure 6 - Vih and Vil (V) Vs Tj (C)
200%
100.00
Rds(on), Drain-to-Source On Resistance (Normalized)
150%
Zth, transient thermal impedance (C/W)
10.00
1.00
100%
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
50% -50 0 50 100 150
Tj, junction temperature (C) Figure 7 - Normalized Rds(on) (%) Vs Tj (C)
Time (s) Figure 8 - Transient thermal impedance (C/W) Vs time (s)
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AUIPS7141R
100
1.4
Ifb, current feedback current (mA)
1.2
25C
1.0 0.8
Max. output current (A)
10
150C
0.6 0.4 0.2 0.0 0 1 2 3 4
1 1.E+01
1.E+02
1.E+03
1.E+04
1.E+05
Inductance (H) Figure 9 - Max. Iout (A) Vs inductance (H)
Iout, output current (A) Figure 10 - Ifb (mA) Vs Iout (A)
1 00 1 0
Tsd, time to shutdown(s)
1 0.1 0.01
'-40C
0.001 0.0001 0 5 1 0 1 5 20
'+25C '+125C
Iout, output current (A)
Figure 11 - Tsd (s) Vs I out (A) SMD with 6cm
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AUIPS7141R
Case Outline 5 Lead - DPAK
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AUIPS7141R
Tape & Reel
5 Lead - DPAK
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AUIPS7141R
Part Marking Information
Ordering Information
Base Part Number Standard Pack Package Type Form
Tube AUIPS7141R D-Pak-5-Lead Tape and reel Tape and reel left Tape and reel right
Complete Part Number Quantity
75 3000 2000 2000 AUIPS7141R AUIPS7141RTR AUIPS7141RTRL AUIPS7141RTRR
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
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