IRF AUIPS7125R

June, 6th 2011
Automotive grade
AUIPS7125R
CURRENT SENSE HIGH SIDE SWITCH
Features



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Product Summary
Suitable for 24V systems
Over current shutdown
Over temperature shutdown
Current sensing
Active clamp
Reverse circulation immunization
Optimized Turn On/Off for EMI
Reverse battery protection (Mosfet on)
Rds(on)
30m max.
Vclamp
65V
Current shutdown 50A min.
Applications



75W Filament lamp
Solenoid
24V loads for trucks
Packages
Description
The AUIPS7125R 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
AUIPS7125R
Battery
Ifb
Current feeback
Input
On
Off
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Out
10k
Load
Rifb
Logic
Ground
Power
Ground
1
AUIPS7125R
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 (if any) to AEC-Q100 requirements are noted in the qualification report.
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AUIPS7125R
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
Max. storage & operating junction temperature
Vcc-60 Vcc+0.3

60

2.5
-32
60
-50
10

50
Pd
Tj max.

Max.
Units
V
A
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
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A
k
3
AUIPS7125R
Static Electrical Characteristics
Tj=-40°C..150°C, Vcc=6-50V (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
3.5
6

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

0.62
0.7
Forward body diode voltage Tj=125°C
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
m
µA
mA
V
m
V
Ids=2A
Vin=Vcc=28V,Vifb=Vgnd
Vout=Vgnd, Tj=25°C
Vcc-Vin=28V, Tj=25°C
Id=10mA
Id=20A see fig. 2
Id=10mA
Isd=2A
If=3A

Switching Electrical Characteristics
Vcc=28V, Resistive load=6.8, Tj=-40°C..150°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.
5
5
35
6
15
10
75
15
30
30
120
30
Units
Test Conditions
µs
See fig. 1
µs
Protection Characteristics
Tj=-40°C..150°C, Vcc=6-50V (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
2.2
165
60
3

°C
A
85
5
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
(2) Guaranteed by design
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Min.
Typ.
Max.
Units
Test Conditions
7050
-5%
-0.06
0
8500
0
0
1
9950
+5
0.06
10
%
A
µA
Iload<14A
Tj=-40°C to +150°C
Iout<14A
Iout=0A
4
AUIPS7125R
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
3.5mA
60V
75V
+
-
Driver
Reset
Set
250
Iout > 60A
Latch
75V
Q
Reverse
Battery
Protection
Diag
+
Tj > 165°C
IN
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IFB OUT
5
AUIPS7125R
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
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 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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AUIPS7125R
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
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AUIPS7125R
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.
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AUIPS7125R
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
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Figure 4 – Icc off (µA) Vs Tj (°C)
9
AUIPS7125R
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
25
50
75
100
125
150
Tj, junction temperature (°C)
Vcc-Vin, supply voltage (V)
Figure 5 – Icc off(µA) Vs Vcc-Vin (V)
Figure 6 – Vih and Vil (V) Vs Tj (°C)
100.00
150%
100%
50%
-50
0
50
100
10.00
1.00
0.10
0.01
1.E-5
Tj, junction temperature (°C)
Figure 7 - Normalized Rds(on) (%) Vs Tj (°C)
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150
Zth, transient thermal impedance (°C/W)
200%
Rds(on), Drain-to-Source On Resistance
(Normalized)
0
1.E-4
1.E-3
1.E-2
1.E-1
1.E+0 1.E+1 1.E+2
Time (s)
Figure 8 – Transient thermal impedance (°C/W)
Vs time (s)
10
AUIPS7125R
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
Inductance (µH)
0
10
20
30
40
50
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
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AUIPS7125R
Case Outline 5 Lead – DPAK
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AUIPS7125R
Tape & Reel
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5 Lead – DPAK
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AUIPS7125R
Part Marking Information
Ordering Information
Base Part Number
Standard Pack
Package Type
Complete Part Number
Form
Tube
AUIPS7125R
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D-Pak-5-Lead
Tape and reel
Quantity
75
AUIPS7125R
2000
AUIPS7125RTR
Tape and reel left
3000
AUIPS7125RTRL
Tape and reel right
3000
AUIPS7125RTRR
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AUIPS7125R
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
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For technical support, please contact IR’s Technical Assistance Center
http://www.irf.com/technical-info/
WORLD HEADQUARTERS:
101 N Sepulbeda Blvd., El Segundo, California 90245
Tel: (310) 252-7105
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AUIPS7125R
Revision History
Revision
A1
A2
A3
A4
A5
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Date
Notes/Changes
08/03/2010
29/04/2010
07/09/2010
31/05/2011
06/06/2011
Correct packing information
Update current sensing capability
Final release
Update IR address
16