TLE7241E Datasheet, PDF (21/71 Pages) Infineon Technologies AG – Dual Channel Constant Current Control Solenoid Driver

TLE 7241E
Functional Description and Electrical Characteristics
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 t_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
Data Sheet
21
Rev. 1.1, 2009-01-19