BTS740S2_07 datasheet(8/17 Pages) INFINEON

Part #	BTS740S2

Description	Smart High-Side Power Switch

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Manufacturer	INFINEON [Infineon Technologies AG]

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Data Sheet

8

V1.0, 2007-05-13

Smart High-Side Power Switch

BTS740S2

Truth Table

Input 1

Output 1

Status 1

Current

Sense 1

Input 2

Output 2

Status 2

Current

Sense 2

level

IIS

Normal

operation

L

H

L

H

L

0

nominal

Current-

limitation

L

H

L

H

0

Short circuit to

GND

L

H

L

L21)

H

0

Over-

temperature

L

H

L

H

0

Short circuit to

Vbb

L

H

L22)

L

0

<nominal 23)

Open load

L

H

L24)

H

H (L25))

L

0

Undervoltage

L

H

L

H

L

0

Overvoltage

L

H

L

H

L

0

Negative output

voltage clamp

L

H

0

L = "Low" Level

X = don't care

Z = high impedance, potential depends on external circuit

H = "High" Level

Status signal after the time delay shown in the diagrams (see fig 5. page 13)

Parallel switching of channel 1 and 2 is possible by connecting the inputs and outputs in parallel. The status

outputs ST1 and ST2 have to be configured as a 'Wired OR' function with a single pull-up resistor. The current

sense outputs IS1 and IS2 have to be connected with a single pull-down resistor.

Terms

352)(7

9

,6

67

*1'

EE

967

9,1

,67

,,1

9EE

,EE

,*1'

/HDGIUDPH

,1

9,6

,,6

9287

921

, /

287

5*1'

&KLS

352)(7

9

,6

67

*1'

EE

967

9,1

,67

,,1

,*1'

/HDGIUDPH

,1

9,6

,,6

9287

921

287

,/

5*1'

&KLS

Leadframe (Vbb) is connected to pin 1,10,11,12,15,16,19,20

External RGND optional; two resistors RGND1, RGND2 = 150

Ω or a single resistor RGND =75 Ω for reverse

battery protection up to the max. operating voltage.

21

) The voltage drop over the power transistor is V

bb-VOUT > 3V typ. Under this condition the sense current IIS is

zero

22) An external short of output to Vbb, in the off state, causes an internal current from output to ground. If RGND

is used, an offset voltage at the GND and ST pins will occur and the VST low signal may be errorious.

23

) Low ohmic short to Vbb may reduce the output current IL and therefore also the sense current IIS.

24

) Power Transistor off, high impedance

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