SP000221225 datasheet(9/14 Pages) INFINEON

Part #	SP000221225

Description	Smart Sense High-Side Power Switch For Industrial Applications

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Manufacturer	INFINEON [Infineon Technologies AG]

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9 / 14 page

PROFET® ITS 640S2

Infineon Technologies AG

Page 9

2006-Mar-28

GND disconnect

PROFET

V

ST

IS

OUT

GND

bb

V

bb

Ibb

6

2

4

3

5

IN

OUT

1

7

V

IN VST VIS

V

GND

Any kind of load. In case of Input=high is VOUT

≈ VIN - VIN(T+) .

Due to VGND >0, no VST = low signal available.

GND disconnect with GND pull up

PROFET

V

ST

IS

OUT

GND

bb

V

bb

6

2

4

3

5

IN

OUT

1

7

V

IN

VSTVIS

V

GND

Any kind of load. If VGND > VIN - VIN(T+) device stays off

Due to VGND >0, no VST = low signal available.

Vbb disconnect with energized inductive

load

PROFET

V

ST

IS

OUT

GND

bb

V

bb

6

2

4

3

5

IN

OUT

1

7

high

Normal load current can be handled by the PROFET

itself.

Vbb disconnect with charged external

inductive load

PROFET

V

ST

IS

OUT

GND

bb

6

2

4

3

5

IN

OUT

1

7

V

bb

high

D

R

L

If other external inductive loads L are connected to the PROFET,

additional elements like D are necessary.

Inductive Load switch-off energy

dissipation

PROFET

IN

ST

OUT

GND

Vbb

=

E

EAS

bb

L

R

ELoad

IS

1

2

5

3

4

6

7

OUT

Vbb

Energy stored in load inductance:

EL = 1/2·L·I

2

L

While demagnetizing load inductance, the energy

dissipated in PROFET is

EAS= Ebb + EL - ER=

∫ VON(CL)·iL(t) dt,

with an approximate solution for RL > 0 Ω:

EAS=

IL·L

2·RL

·

(Vbb + |VOUT(CL)|)· ln (1+

IL·RL

|VOUT(CL)| )

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