August, 27th 2009
Automotive grade
AUIPS7141R
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CURRENT SENSE HIGH SIDE SWITCH
Features
• Suitable for 24V systems
• Over current shutdown
Over temperature shutdo•
• Current sensing wn
/Off for EMI
amp
for trucks
is a fully protected four terminal high
• Active clamp
• Low current
• ESD protection
• Optimized Turn On
Applications
• 21W Filament l
• Solenoid
• 24V loads
Description
The AUIPS7141R
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.
Product Summary
Rds(on) 100mΩ max.
Vclamp 65V
Current shutdown 20A min.
Packages
DPak
Typical Connection
Out
IPS
IN
2.5k
Vcc
Load
Battery
Input
Power
Ground
Ifb
Logic
Ground
Current feebac k 10k
On
Off
AUIPS7141R
Qualification Information
†
Automotive
(per AEC-Q100
††
)
Qualification Level 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.
Moisture Sensitivity Level DPAK-5L MSL1,
260°C
(per IPC/JEDEC J-STD-020)
Machine Model Class M2 (200 V)
(per AEC-Q100-003)
Human Body Model Class H1C (1500 V)
(per AEC-Q100-002)
ESD
Charged Device Model Class C5 (1000 V)
(per AEC-Q100-011)
IC Latch-Up Test Class II, Level A
(per AEC-Q100-004)
RoHS Compliant 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).
meter Symbol Para Min. Max. Units
Vout Maximum output voltage Vcc-60 Vcc+0.3 V
Vcc-Vin max. Maximum Vcc voltage -16 60 V
Iifb, max. Maximum feedback current -50 10 mA
Vcc sc. Maximum Vcc voltage with short circuit protection see page 7 V
⎯
50
Maximum power dissipation (internally lim rmal protection) ited by the
Pd Rth=50°C/W DPack 6cm² footprint
⎯
2.5 W
Tj max. Max. storage & operating junction temperature -40 150 °C
Thermal Characteristics
bol p. Max. Units Sym Parameter Ty
Rth1 Thermal resistance junction to ambient DPak Std footpri 70
⎯
nt
Rth2 junction to ambient Dpak 6cm² footp 50
⎯
Thermal resistance rint
Rth3 Thermal resistance junction to case Dpak 4
⎯
°C/W
Recommended Operating Conditions
These values are given for a quick design.
Sym in. Max. Units bol Parameter M
Continuous output current, Tambient=85°C, Tj=125°C Iout A
Rth=50°C/W, Dpak 6cm² footprint
⎯
2.1
RIfb Ifb resistor 1.5
⎯
kΩ
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AUIPS7141R
Static Electrical Characteristics
meter Min. Typ. Max. Units Test Conditions
Tj=25°C, Vcc=28V (unless otherwise specified)
Symbol Para
Vcc op. Operating voltage 6
⎯
60 V
ON state resistance Tj=25°C
⎯
75 100
Rds(on) 150°C(2)
⎯
135 180 mΩ
ON state resistance Tj= Id As=2
Icc off Supply leakage current
⎯
1 3
Iout off Output leakage current
⎯
1 3 µA V cc / =Vg
V Vgn
in=V Vifb nd
out= d
I in on mA Vcc-Vin=28V Input current while on 0.6 1.6 3
V clamp1 cc to Vout clamp voltage 1 Id=10mA
V 60 64
⎯
V clamp2 65 72 Id=6A see fig. 2 Vcc to Vout clamp voltage 2 60
Vih(1) High level Input threshold voltage
⎯
3 4.5 Id=10mA
Vil(1) Low level Input threshold voltage 1.5 2.3
⎯
F iode volorward body d tage Tj=25°C
⎯
0.8 0.9
Vf F
V
orward body diode voltage Tj=125°C
⎯
0.65 0.75 If=1A
( t threshold
S hing E
cc=28V, Resistive load=27 , Tj=25°C
in. Typ. Max. Units Test Conditions
1) Inpu s are measured directly between the input pin and the tab.
witc lectrical Characteristics
ΩV
Symbol Parameter M
tdon Turn on delay time to 20% 4 10 20
tr Rise time from 20% to 80% of Vcc 2 5 10 µs
tdoff T 80 urn off delay time 20 40
tf F µs .
all time from 80% to 20% of Vcc 2.5 5 10
See fig 1
Protection Characteristics
Symbol Parameter Min. Typ. Max. Units Test Conditions
Tsd Over temperature threshold 150(2) 165
⎯
°C See fig. 3 and fig.11
Isd Over-current shutdown 20 25 35 A See fig. 3 and page 6
I fault Ifb after an over-current or an over-
temperature (latched) 2.7 3.3 4 mA See fig. 3
Current Sensing Characteristics
Symbol Parameter Min. Typ. Max. Units Test Conditions
Ratio I load / Ifb current ratio 2000 2400 2800 Iload=2A
Ratio_TC I load / Ifb variation over temperature(2) -5% 0 +5 % Tj=-40°C to +150°C
I offset Load current offset -0.2 0 0.2 A Iout<2A
Ifb leakage Ifb leakage current On in open load 0 8 100 µA Iout=0A
(2) Guaranteed by design
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AUIPS7141R
Lead Assignments
1- NC
2- In
3- Vcc
4- Ifb t 5- Ou
1 2 4 5
ak
cc
DP
3- V
Functional Block Diagram
All values are typical
Diag
Charge
Pump
D
VCC
ri rve
IFB OUT
75V
100Ω
Tj > 165°C
Iout > 25A
60V
75V
-
+
75V
IN
Set
Reset
Latch
Q
1.5mA 3V
+
-
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AUIPS7141R
Truth Table
Op. Conditions Input Output Ifb pin voltage
Normal mode H L 0V
Normal mode L H I load x Rfb / Ratio
Open load H L 0V
Open load L H 0V
Short circuit to GND H L 0V
Short circuit to GND L L V fault (latched)
Over temperature H L 0V
Over temperature L L 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 spe
cified 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:
)t(ZP
CLAMPTHCLTj
⋅=∆
Where:
)t(Z
CLAMPTH is the thermal impedance at t
CLAMP
and can be read from the thermal impedance curves given in the
data sheets.
CLavgCLCL
IVP ⋅=
: Power dissipation during active clamp
65VV
CL
=
: Typical V
CLAMP
value.
2
I
I
CL
CLavg
=
: Average current during active clamp
dt
di
I
t
CL
CL
=
: Active clamp duration
LVV
dt
di
CLBattery
−
=
: Demagnetization current
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
Iout
Ifb leakage
Ifb2
Ifb1
Iout2 Iout1 I offset
)/( Ifb2 – Ifb1)
Iout1
the system will depends on the variation of
the I offset and the ratio over the temperature range. The Ratio_TC specified in page 4.
on the Rdson :
set@25°C / 1.9
Maximum Vcc voltage with short circuit protection
rt circuit is the maximum voltage for which the part is able to protect itself under test
of short circuits are considered : terminal and load short circuit.
L SC R SC
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
I offset = Ifb1 x Ratio –
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
ratio variation is given by
The Ioffset variation depends directly
I offset@-40°C= I offset@25°C / 0.8
I offset@150°C= I off
The maximum Vcc voltage with sho
conditions representative of the application. 2 kind
Terminal SC 0.1 µH 10 mohm
Load SC 10 µH 100 mohm
Out
IPS
Vcc
L SC
L s
5µ
upply
H R supply
10mohm
R SC
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AUIPS7141R
T
j
Tsd
165°C
Ids
Vin
I shutdown
Tshutdown
Vifb
V fault
Figure 3 – Protection timing diagram
itching definitions
Vds
Ids
Vcc-Vin
Figure 1 – IN rise time & sw
Vcc
Vds cl amp
T clamp
See Appli cat ion Notes to evaluate power dissipat ion
Figure 2 – Active clamp waveforms
0
2
4
8
-50 0 50 100 150
Tj, junction temperature (°C)
Figure 4 – Icc off (µA) Vs Tj (°C)
Vout
Vcc-Vin
80%
20%
80%
20%
Td on Tr Td off Tf
10
6
Icc off, supply leakage current (µA)
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AUIPS7141R
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Figure 8 – Transient thermal impedance (°C/W)
Vs time (s)
)
h, transient thermal impedance (°C/WZt
Time (s)
50%
100%
150%
200%
-50 0 50 100 150
Rds(on), Drain-to-Source On Resistance
(Normalized)
Fig C)
Tj, junction temperature (°C)
ure 7 - Normalized Rds(on) (%) Vs Tj (°
0-50 -25 0 25 50 75 100 125 150
1
2
3
4
VIH
VIL
Tj, junction temperature (°C)
Vih and Vil (V)
Vcc-Vout, supply voltage (V)
Figure 6 – Vih and Vil (V) Vs Tj (°C) Figure 5 – Icc off (µA) Vs Vcc-Vout (V)
Icc, supply current (µA)
0.01
0.10
1.00
10.00
100.00
1.E-
05 1.E-
04 1.E-
03 1.E-
02 1.E-
01 1.E+0
01.E+0
11.E+0
2
20
5
10
15
001020304050
AUIPS7141R
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1
10
100
1.E+01 1.E+02 1.E+03 1.E+04 1.E+05
Fi )
Ifb, curre ent (mA)
gure 9 – Max. Iout (A) Vs inductance (µH
Inductance (µH)
Max. output current (A)
Figure 10 – Ifb (mA) Vs Iout (A)
Iout, output current (A)
nt feedback curr
0.0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
0123
25°C
150°C
4
SMD with 6cm²
Tsd, time to shutdown(s)
0.0001
0.001
0.01
0.1
1
10
100
0 5 10 15 20
'-40°C
'+25°C
'+125°C
Iout, output current (A)
Figure 11 – Tsd (s) Vs I out (A)
AUIPS7141R
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Case Outline 5 Lead – DPAK
AUIPS7141R
Tape & Reel 5 Lead – DPAK
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AUIPS7141R
Part Marking Information
Ordering Information
Standard Pack
Base Part Number Package Type Form Quantity
Complete Part Number
Tube 75 AUIPS7141R
Tape and reel 3000 AUIPS7141RTR
Tape and reel left 2000 AUIPS7141RTRL
AUIPS7141R D-Pak-5-Lead
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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