AUIR3240S_15 [INFINEON]

LOW QUIESCENT CURRENT MOSFET DRIVER;
AUIR3240S_15
型号: AUIR3240S_15
厂家: Infineon    Infineon
描述:

LOW QUIESCENT CURRENT MOSFET DRIVER

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Automotive grade  
AUIR3240S  
LOW QUIESCENT CURRENT MOSFET DRIVER  
Features  
Product Summary  
Very low quiescent current on state  
Boost converter with integrated diode  
Operating voltage 4-36V  
Vgate 11.5V min.  
Iqcc On 50µA max.  
Standard level gate voltage  
Wide operating voltage 4-36V  
Temperature monitoring with NTC interface  
Lead-Free, Halogen Free, RoHS compliant  
Applications  
Battery switch for Stop and Start system  
Package  
Description  
The AUIR3240S is a high side mosfet driver for battery  
switch application where a very low quiescent current is  
required when the driver is on. The AUIR3240S is a  
combination of a boost DC/DC converter using an external  
inductor and a gate driver. It drives standard level Mosfet  
even at low battery voltage. The input is active low to  
reduce current consumption.  
SO8  
Typical Connection  
Main Battery  
Loads  
GATE  
NTC  
NTC  
Cout  
VCC  
SW  
RS  
Rs Ntc  
V DG IN  
R Ntc NTC EN  
500µH  
Current measurement  
/IN  
Rin  
Rs  
GND  
1
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October 21, 2013  
AUIR3240S  
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.  
MSL2, 260°C  
SOIC-8L  
Moisture Sensitivity Level  
(per IPC/JEDEC J-STD-020)  
Class M0 (+/-50V)  
(per AEC-Q100-003)  
Class H0 (+/-50V)  
Machine Model  
ESD  
Human Body Model  
Charged Device Model  
(
)
per AEC-Q100-002  
Class C4 (+/-1000V)  
(per AEC-Q100-011)  
IC Latch-Up Test  
RoHS Compliant  
Yes  
Yes  
††  
Qualification standards can be found at International Rectifier’s web site http://www.irf.com/  
Exceptions to AEC-Q100 requirements, if any, are noted in the qualification report.  
2
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AUIR3240S  
Absolute Maximum Ratings  
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage parameters  
are referenced to Ground lead. (Tambient=25°C unless otherwise specified).  
Symbol  
Vcc-gnd  
Vgate-Vsw  
Vsw-gnd  
Vrs-gnd  
Vntc  
Vntc_en  
Vin  
Isw  
Parameter  
Maximum Vcc voltage  
Maximum Vgate-Vsw voltage  
Maximum Sw voltage  
Maximum Rs voltage  
Maximum Ntc voltage  
Maximum NTC_EN voltage  
Maximum IN pin voltage  
Maximum continuous current in SW pin  
Max. storage & operating temperature junction temperature  
Min. Max. Units  
-0.3  
-1  
65  
65  
65  
6
65  
6
6
200  
150  
-0.3  
-0.3  
-0.3  
-0.3  
-0.3  
V
mA  
°C  
Tj max.  
-40  
Thermal Characteristics  
Symbol  
Parameter  
Typ. Max. Units  
100 °C/W  
Rth  
Thermal resistance junction to ambient  
Recommended Operating Conditions  
Symbol  
VIH  
Parameter  
Min. Max. Units  
High level input voltage  
Low level input voltage  
Serial NTC resistor  
Input resistor  
2.5  
0
4
5.5  
0.9  
10  
V
VIL  
Rs NTC  
Rin  
k  
4
10  
3
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AUIR3240S  
Static Electrical Characteristics  
Tj=-40..125°C, Vcc=6..16V (unless otherwise specified), typical value are given for Vcc=14V and Tj=25°C.  
Symbol  
Vcc op.  
Iq Vcc Off  
Parameter  
Operating voltage range  
Supply current when Off, Tj=25°C  
Supply current when Off, Tj=125°C  
Supply current when On, Tj=25°C  
Supply current when On, Tj=125°C  
Min. Typ. Max. Units Test Conditions  
85  
110  
2
3
6
12  
17  
55  
30  
2
12.5  
1.1  
1
4
15  
50  
36  
120  
200  
10  
10  
20  
40  
20  
60  
65  
2.5  
13.5  
1.3  
1.2  
1.2  
13  
15  
20  
30  
35  
55  
1
V
See page 10  
Vin=5V, NTC_EN=0V  
K1 off, K2 on  
Vin=0V, NTC_EN=0V  
K1 off, see page 8  
Vin=0V, Vgate=14V  
K1 off, see page 8  
I=10mA  
Iq Vcc On  
µA  
Iq gate On Quiescent current on Gate, Tj=25°C  
Quiescent current on Gate, Tj=125°C  
Vbr gate  
OV  
Breakdown voltage between and Vcc  
Over-voltage protection  
Input current  
V
Iin  
µA  
Vin=5V  
Vin th  
Vgs th  
Vrs th  
IN threshold voltage  
1
Gate output threshold  
Rs threshold, Tj=-40°C  
Rs threshold, Tj=25°C  
Rs threshold, Tj=125°C  
Rdson of K1, Tj=-40°C  
Rdson of K1, Tj=25°C  
Rdson of K1, Tj=125°C  
Rdson of K2, Tj=-40°C  
Rdson of K2, Tj=25°C  
Rdson of K2, Tj=125°C  
Forward voltage of rectifier diode  
Quiescent current in NTC  
11.5  
0.9  
0.85  
0.75  
Igate=0µA  
V
0.95  
8
Rdson K1  
Rdson K2  
I=100mA  
11  
15  
20  
25  
40  
0.7  
0.1  
Vf  
Iq ntc  
V
I=100mA  
V NTC=16V,  
Vntc_en=0V  
Vntc>6V  
1
µA  
1.15  
1.9  
1.9  
2.2  
I Ntc  
Out Ntc current R ntc=7k, Vdg in=5V  
1
1.5  
2.05  
mA  
V
Vth_ntc_en NTC_EN threshold voltage  
I ratio ntc  
I=500µA  
Current ratio between NTC_EN and NTC  
Vntc>6V  
Timing Converter Characteristics  
Tj=-40..125°C, Vcc=6..16V (unless otherwise specified), typical value are given for Vcc=14V and Tj=25°C.  
Symbol  
Toff  
Tdon K1  
Tdoff K1  
Parameter  
Off time  
Turn-on delay of K1  
Turn-off delay of K1  
Min. Typ. Max. Units Test Conditions  
5
7.5  
0.2  
10  
10  
µs  
Switching Characteristics  
Tj=-40..125°C, Vcc=6..16V (unless otherwise specified), typical value are given for Vcc=14V and Tj=25°C.  
Symbol  
Tdon K2  
Tf K2  
Parameter  
Turn-on delay of K2  
Fall time of K2 90% to 10% of Vgate-Vcc  
Gate low short circuit pulsed current  
Min. Typ. Max. Units Test Conditions  
1
2.5  
6
4
20  
C=100nF  
µs  
Iout- K2  
100  
350  
mA  
Vgate=14V  
4
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AUIR3240S  
Lead Definitions  
Pin number  
Symbol Description  
1
NTC  
An NTC resistor can be connected between this pin and the Vcc line close to the tab  
to sense the temperature of the Mosfet  
NTC_EN is the input of the NTC system.  
Active low input pin to enable the boost converter or short the gate to Vcc  
Ground pin  
Current sense input pin  
Output of K1  
2
3
4
5
6
7
8
NTC_EN  
/IN  
GND  
RS  
SW  
VCC  
GATE  
Power supply  
Output of the boost converter  
Lead Assignments  
8 7 6 5  
1- NTC  
2- NTC_EN  
3- /IN  
4- GND  
5- RS  
6- SW  
1 2 3 4  
SO8  
7- VCC  
8- GATE  
5
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AUIR3240S  
Block diagram  
Main Battery  
Gate  
NTC  
75V  
NTC  
NTC EN  
6V  
17V  
+
-
K2  
12.5V  
75V  
Vcc  
75V  
D
75V  
SW  
Current mirror  
500µH  
Vcc>OV  
K1  
/IN  
6V  
Rs  
toff  
7.5µs  
+
-
1V  
6V  
50  
Gnd  
6
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AUIR3240S  
Description  
The topology of the AUIR3240S is a boost DC/DC converter working in current mode. K1 is switched on when the gate  
voltage is lower than Vgs threshold. When Rs pin reaches Vrs th, K1 is turned off and the inductor charge the gate  
capacitor through D. The system cannot restart during Toff after Vrs th has been reached. The DC/DC restart only when  
the Gate and the Vcc voltage difference is lower than 12.5V in order to achieve low quiescent current on the power  
supply.  
To turn off the power Mosfet, the input must be pull high. Then the DC/DC converter is turned and K2 shorts the gate to  
Vcc.  
Vin  
Ipeak  
Irs  
Vgs threshold  
Vgs  
Parameters definition  
Current definition  
Iq gate On  
Iq NTC  
NTC  
GATE  
Iq Vcc Off  
Iq Vcc On  
I out leakage  
VCC  
SW  
NTC EN  
/IN  
RS  
GND  
7
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AUIR3240S  
Timing definition  
Vin  
T
Ipeak  
Ik1  
Toff  
Vgate peak  
Vgsth  
Vgate-  
Vcc  
Ipeak=Vrs th/Rs  
IL  
tdischarge  
ton  
Vgs threshold  
Vgate-Vcc  
Tdon K1  
Tdoff K1  
Vrsth  
Vrs  
Low quiescent current operation when On.  
The AUIR3240S is able to operate with a very low quiescent current on the Vcc pin. Nevertheless the supply current  
depends also on the leakage of the power mosfet named “I out leakage” on the diagram below.  
The leakage current is given when K1 is off. When K1 is on, the current flowing in Vcc is the current charging the inductor.  
Therefore the average current on the Vcc is the combination of the current when K1 is ON and OFF. The average current  
on the Vcc pin can be calculated using:  
8
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AUIR3240S  
With Vgate: the average voltage on the output.  
Vgate peak can be calculated by:  
During On operation, the DC/DC works in pulse mode, meaning each time the Vgate-Vcc voltage comes below 12.5V, the  
AUIR3240S switches on K1 to recharge the gate voltage. When the Iout leakage is low enough to maintain the DC/DC in  
discontinuous mode, the frequency is calculate by:  
Peak current control  
The current in the inductor is limited by the 1V comparator which monitors the voltage across Rs. Due to the delay in the  
loop (tdoff K1), the inductor current will exceed the threshold set by:  
At low voltage, the current waveform in the inductor is not anymore linear, but exponential because the sum of the resistor  
of K1, the inductor and RS are not any more negligible.  
Vrsth  
Vrs  
t Vrsth  
t on  
tdoff K1  
The peak current and ton can be calculated as follow:  
Where Rl is the resistor of the inductor  
With :  
The peak current can be solved by:  
9
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AUIR3240S  
Output voltage Characteristic  
In most of case when the output of the AUIR3240S is able to recharge the capacitor higher than Vgsth, the output voltage  
will oscillate between Vgsth and Vgate peak. Vgate peak can be calculated by:  
Minimum operating voltage  
While the AUIR3240S operating voltage is specified between 4V and 36V. The minimum voltage is limited by the fact that  
the Rs voltage must reach the Vrsth taking account all resistors which limit the inductor current.  
Over-Voltage protection  
The AUIR3240S integrates an over-voltage protection in order to protect K1. When Vcc exceed the Over-voltage  
threshold, the DC/DC is stopped.  
NTC interface  
The NTC interface allows the system to have a temperature measurement of the mosfet using one resistor and one NTC.  
The NTC must be connected to Vcc and close to the tab of the power Mosfet to have a good temperature sensing. The  
system works as a current mirror between NTC_EN and NTC pins. The typical ratio is 2, with 500µA flowing into  
NTC_EN, 1mA will flow in the NTC. The current in the NTC is fixed by adjusting R_Ntc and V_Dg_In. With 7k and 5V, the  
current in the NTC will be 1mA. The NTC function activated only if NTC_EN is powered.  
If the NTC feature function is not used, NTC EN and NTC must be remained floating. The low consumption is achieved  
only when the NTC interface is not activated.  
Output current measurement  
The average current into Rs can be measured by adding a low pass filter before the ADC of the micro controller. Then the  
average output current can be evaluated using :  
I out av = I Rs av * Vcc / ( Vgate - Vcc )  
Knowing the output current can be useful to do a diagnostic on the power Mosfet. If the gate is short, the output current  
will be significantly higher than in normal operation.  
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AUIR3240S  
Figures are given for typical value, Vcc=14V and Tj=25°C otherwise specified  
4
3
2
1
0
4
3
2
1
0
-50  
0
50  
100  
0
5
10  
15  
20  
Tj, junction temperature (°C)  
Vcc, Supply voltage (V)  
Figure 1 – Iq Vcc on (µA) Vs Tj (°C)  
Figure 2 – Iq Vcc on (µA) Vs Vcc(V)  
15  
10  
5
6
5
4
3
2
1
0
0
-50  
0
50  
100  
0
5
10  
15  
20  
Tj, junction temperature (°C)  
Vcc, Supply voltage (V)  
Figure 3 – Iq Gate on (µA) Vs Tj (°C)  
Figure 4 – Iq Gate on (µA) Vs Vcc(V)  
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AUIR3240S  
150  
100  
50  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
0
-50  
0
50  
100  
-50  
0
50  
100  
Tj, junction temperature (°C)  
Tj, junction temperature (°C)  
Figure 5 – Iq Vcc off (µA) Vs Tj (°C)  
Figure 6 – Vf (mV) Vs Tj (°C)  
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AUIR3240S  
Case Outline – SO8  
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AUIR3240S  
Tape & Reel SO8  
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AUIR3240S  
Part Marking Information  
Ordering Information  
Standard Pack  
Form  
Base Part Number  
Package Type  
Complete Part Number  
Quantity  
95  
Tube  
Tape and reel  
AUIR3240S  
AUIR3240S  
SOIC8  
2500  
AUIR3240STR  
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AUIR3240S  
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  
is accompanied by all associated warranties, conditions, limitations, and notices. Reproduction of this information with  
alterations is an unfair and deceptive business practice. IR is not responsible or liable for such altered documentation.  
Information of third parties may be subject to additional restrictions.  
Resale of IR products or serviced with statements different from or beyond the parameters stated by IR for that product or  
service voids all express and any implied warranties for the associated IR product or service and is an unfair and  
deceptive business practice. IR is not responsible or liable for any such statements.  
IR products are not designed, intended, or authorized for use as components in systems intended for surgical implant into  
the body, or in other applications intended to support or sustain life, or in any other application in which the failure of the  
IR product could create a situation where personal injury or death may occur. Should Buyer purchase or use IR products  
for any such unintended or unauthorized application, Buyer shall indemnify and hold International Rectifier and its officers,  
employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and  
reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such  
unintended or unauthorized use, even if such claim alleges that IR was negligent regarding the design or manufacture of  
the product.  
Only products certified as military grade by the Defense Logistics Agency (DLA) of the US Department of Defense, are  
designed and manufactured to meet DLA military specifications required by certain military, aerospace or other  
applications. Buyers acknowledge and agree that any use of IR products not certified by DLA as military-grade, in  
applications requiring military grade products, is solely at the Buyer’s own risk and that they are solely responsible for  
compliance with all legal and regulatory requirements in connection with such use.  
IR products are neither designed nor intended for use in automotive applications or environments unless the specific IR  
products are designated by IR as compliant with ISO/TS 16949 requirements and bear a part number including the  
designation “AU”. Buyers acknowledge and agree that, if they use any non-designated products in automotive  
applications, IR will not be responsible for any failure to meet such requirements.  
For technical support, please contact IR’s Technical Assistance Center  
http://www.irf.com/technical-info/  
WORLD HEADQUARTERS:  
101 N. Sepulveda Blvd., El Segundo, California 90245  
Tel: (310) 252-7105  
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AUIR3240S  
Revision History  
Revision  
Date  
Notes/Changes  
A
B
December 10th, 2011  
March, 28th 2012  
Initial release  
Page4 correct temperature condition  
for Vrsth +125°C  
Update maximum operating  
temperature  
C
April, 2nd 2012  
D
E
F
July, 17th 2012  
November, 19th 2012  
October, 17th 2013  
Update page 4, Tdon K1 typ.  
Update formula page 9 tVrsth  
Update NTC interface current  
page10  
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