L99DZ120 datasheet(76/162 Pages) STMICROELECTRONICS

76 / 162 page

Application information

L99DZ120

76/162

DocID029145 Rev 4

4.11.2

VSREG supply failure

VSREG overvoltage

If the supply voltages VSREG reaches the overvoltage threshold VSREG_OV:



LIN is switched to high impedance



OUT15 and OUT_HS are turned off (default).

The shutdown of outputs may be disabled by SPI (VSREG_OV_SD_EN (CR 3) = 0)



Recovery of outputs after overvoltage condition is configurable by SPI:

–

VSREG_LOCK_EN (CR 3) = 1: outputs are off until Read&Clear VSREG_OV

(SR 2).

–

VSREG_LOCK_EN (CR 3) = 0: outputs turned on automatically after VSREG

overvoltage condition has recovered.



The overvoltage bit VSREG_OV (SR 2) is set and can be cleared with a ‘Read&Clear’

command. The overvoltage bit is reset automatically if VSREG_LOCK_EN (CR 3) = 0

and the overvoltage condition has recovered.

VSREG undervoltage

If the supply voltage VSREG drops below the under voltage threshold voltage (VSREG_UV):



LIN is switched to high impedance



OUT15 and OUT_HS are turned off (default).



The shutdown of outputs may be disabled by SPI (VSREG_UV_SD_EN (CR 3) = 0)



Recovery of outputs after undervoltage condition is configurable by SPI:

–

VSREG_LOCK_EN (CR 3) = 1: outputs are off until Read&Clear VSREG_UV

(SR 2).

–

VSREG_LOCK_EN (CR 3) = 0: Outputs turned on automatically after VSREG

undervoltage condition has recovered.



The undervoltage bit VSREG_UV (SR 2) is set and can be cleared with a ‘Read&Clear’

command. The undervoltage bit is removed automatically if

VSREG_LOCK_EN (CR 3) = 0 and the undervoltage condition has recovered.

L99DZ120 датащи(PDF) 76 Page - STMicroelectronics

L99DZ120 датащи(HTML) 76 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL