BTS640S2 datasheet(7/15 Pages) INFINEON

Part #	BTS640S2

Description	Smart Sense High-Side Power Switch

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Manufacturer	INFINEON [Infineon Technologies AG]

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7 / 15 page

BTS 640 S2

Semiconductor Group

Page 7

2003-Oct-01

Truth Table

Input

Output

Status

Current

Sense

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

L16)

H

0

Over-

temperature

L

H

L

H

0

Short circuit to

Vbb

L

H

L17)

L

0

<nominal 18)

Open load

L

H

L19)

H

H (L20))

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 12...13)

16

) The voltage drop over the power transistor is Vbb-VOUT>typ.3V. Under this condition the sense current IIS is

zero

17) 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.

18

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

19

) Power Transistor off, high impedance

20

) with external resistor between pin 4 and pin 6&7

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