AUIPS7141R Data Sheet (339 KB, EN)

August, 27th 2009
Automotive grade
AUIPS7141R
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
Low current
ESD protection
Optimized Turn On/Off for EMI
Rds(on)
100mΩ max.
Vclamp
65V
Current shutdown 20A min.
Applications
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•
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21W Filament lamp
Solenoid
24V loads for trucks
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
IPS
IN
Battery
Ifb
Current feeback
Input
On
Off
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Out
10k
Load
2.5k
Logic
Ground
Power
Ground
Subject to change without notice
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AUIPS7141R
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.
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=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
-16
60
-50
10
⎯
50
Pd
Tj max.
⎯
Max.
Units
V
V
mA
V
W
-40
2.5
150
°C
Typ.
Max.
Units
70
50
4
⎯
⎯
⎯
°C/W
Min.
Max.
Units
⎯
2.1
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
kΩ
3
AUIPS7141R
Static Electrical Characteristics
Tj=25°C, Vcc=28V (unless otherwise specified)
Symbol
Parameter
Min.
Typ.
Max.
⎯
60
Operating voltage
6
⎯
75
100
ON state resistance Tj=25°C
⎯
ON state resistance Tj=150°C(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=25°C
⎯
Forward body diode voltage Tj=125°C
0.65
0.75
(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
Ids=2A
Vin=Vcc / Vifb=Vgnd
Vout=Vgnd
Vcc-Vin=28V
Id=10mA
Id=6A see fig. 2
Id=10mA
If=1A
Switching Electrical Characteristics
Vcc=28V, Resistive load=27Ω, 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
Units
Test Conditions
µs
See fig. 1
µs
Protection Characteristics
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(2)
20
2.7
165
25
3.3
⎯
35
4
°C
A
Min.
Typ.
Max.
2000
-5%
-0.2
0
2400
0
0
8
2800
+5
0.2
100
mA
Test Conditions
See fig. 3 and fig.11
See fig. 3 and page 6
See fig. 3
Current Sensing Characteristics
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
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Units
Test Conditions
%
A
µA
Iload=2A
Tj=-40°C to +150°C
Iout<2A
Iout=0A
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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
Charge
Pump
3V
75V
1.5mA
60V
75V
+
-
Driver
Reset
Set
100Ω
Iout > 25A
Latch
75V
Q
Diag
+
Tj > 165°C
IN
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IFB OUT
5
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 =
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.
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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@-40°C= I [email protected]°C / 0.8
I [email protected]°C= I [email protected]°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
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AUIPS7141R
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
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Figure 4 – Icc off (µA) Vs Tj (°C)
8
20
4
15
3
Vih and Vil (V)
Icc, supply current (µA)
AUIPS7141R
10
5
2
VIH
1
VIL
0
0
0
10
20
30
40
-50
50
-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)
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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
AUIPS7141R
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
1.E+05
Inductance (µH)
1.2
25°C
1.0
0.8
150°C
0.6
0.4
0.2
0.0
0
1
2
3
4
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
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10
AUIPS7141R
Case Outline 5 Lead – DPAK
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11
AUIPS7141R
Tape & Reel
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5 Lead – DPAK
12
AUIPS7141R
Part Marking Information
Ordering Information
Base Part Number
Standard Pack
Package Type
Complete Part Number
Form
Tube
AUIPS7141R
D-Pak-5-Lead
Quantity
75
AUIPS7141R
Tape and reel
3000
AUIPS7141RTR
Tape and reel left
2000
AUIPS7141RTRL
Tape and reel right
2000
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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