TLE8201R datasheet(13/45 Pages) INFINEON

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TLE 8201R

Data Sheet Rev. 2.0

2006-06-07

4.2.3

Current Sense

A current proportional to the output current that flows from the selected power output to

GND is provided at the ISO (I sense out) pin. The output selection is done via the SPI.

The sense current can be transformed into a voltage by an external sense resistor and

provided to an A/D converter input (see section application).

4.2.3.1

Characteristics Current Sense

Electrical Characteristics

8 V <

S < 20 V; 4.75 V < VCC < 5.25 V; INH = High; all outputs open;

-40

°C < T

j < 150 °C; unless otherwise specified

Pos. Parameter

Sym-

bol

Limit Values

Unit Conditions

min.

typ.

max.

HS1, HS2 (Register IS = 000, 001)

4.2.13 Output voltage range

ISO12

–3V

CC = 5 V

4.2.14 Current Sense Ratio

ILIS12

–

2000

–

ILIS = IOUT/IISO

OUT > 3 A

4.2.15 Current Sense accuracy

ILISacc

––

4.2.16 Matching

∆k

ILIS1

-6

12%

∆k

ILIS12 = (kILIS1

ILIS2) / kILIS1

HS3, HS4 (Register IS = 010, 011)

4.2.17 Output voltage range

ISO34

–3V

CC = 5 V

4.2.18 Current Sense Ratio

ILIS34

–

1000

–

ILIS = IOUT/IISO

OUT > 1.5 A

4.2.19 Current Sense accuracy

ILISacc

––

HS7 (Register IS = 100)

4.2.20 Output voltage range

ISO7

–3V

CC = 5 V

4.2.21 Current Sense Ratio for HS7

ILIS7

–

2000

–

ILIS = IOUT/IISO

OUT > 2A

4.2.22 Current Sense accuracy

ILISacc

––

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