TLE7241E datasheet(21/71 Pages) INFINEON

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TLE 7241E

Functional Description and Electrical Characteristics

Data Sheet

Rev. 1.1, 2009-01-19

5.4.3

Open Load / Short to Ground Detection

The OLSG fault bit is set under the following conditions.

Operating Condition #1

The average current command is > 50 mA (with 1

Ω sense resistor) and the low-side

driver is ON (solenoid current is increasing).

The OLSG (open load/short to ground) fault bit will be set if the low-side transistor

remains on for a time greater than the on state open sense time (“Electrical

Characteristics” on Page 23, Item 5.4.3.3).

Operating Condition #2

The average current command is > 50 mA (with 1

Ω sense resistor) and the low-side

driver is OFF.

The OLSG fault bit is set if the voltage on the NEGx pin is less than the NEG pin OLSG

threshold voltage (“Electrical Characteristics” on Page 23, Item 5.4.3.6) for a time

greater than the NEG pin OLSG delay time (“Electrical Characteristics” on Page 23,

Item 5.4.3.5).

Operating Condition #3

The average current command is < 50 mA (with a 1

Ω sense resistor) and the fault typing

bit = 0.

The OLSG (open load/short to ground) fault bit will be set if the POS pin voltage is less

than the off state open load threshold (“Electrical Characteristics” on Page 20,

Item 5.4.2.3) for longer than the off state open load sense time (“Electrical

Characteristics” on Page 23, Item 5.4.3.4) or the NEG pin is less than the NEG pin

OLSG threshold voltage (“Electrical Characteristics” on Page 23, Item 5.4.3.6) for a

time greater than the NEG pin OLSG delay time (“Electrical Characteristics” on

Page 23, Item 5.4.3.5). A pull-down current (“Electrical Characteristics” on Page 23,

Item 5.4.3.1) will be activated between the POS pin and ground when the Fault Typing

bit = 0.

Operating Condition #4

The average current command is < 50 mA (with a 1

Ω sense resistor) and the fault typing

bit = 1.

The OLSG fault bit will be set when the voltage on the pin POSx is below the off state

open load threshold (“Electrical Characteristics” on Page 20, Item 5.4.2.3) for the a

time greater than

os(off) (“Electrical Characteristics” on Page 23, Item 5.4.3.4) or the

NEG pin is less than the NEG pin OLSG threshold voltage (“Electrical Characteristics”

on Page 23, Item 5.4.3.6) for a time greater than the NEG pin OLSG delay time

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