L9779WD-SPI datasheet(75/141 Pages) STMICROELECTRONICS

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L9779WD-SPI

Functional description

140

Figure 52. Short to GND detection during “on” phase

Table 34. Stepper configuration electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max

Unit

OUT

A to D

VOutnorm

OUT(21,22),

OUT(23,24),

OUT(25,27),

OUT(26,28) output

voltage

OUT(21,22) short to

OUT(23,24);

OUT(25,27) short to

OUT(26,28);

2.3

2.7

HVTH

Diagnostic high

threshold

Driver in OFF condition

VOutnorm

+120mV

-3

LVTH

Diagnostic low

threshold

Driver in OFF condition

1.9

VOutnorm

-200mV

IOVC

Over current

threshold

-1

2.1

I_OPEN_LOAD

Output open load

threshold current

-10

IOUT_PD_A+B

or C+D

Output diagnostic

pull down current

OFF STATE

Vpin = 5 V

200

350

µA

IOUT_PU_A+B

or C+D

Output diagnostic

pull up current OFF

STATE

Vpin = 1.5 V

150

µA

Ropenl

Open load resistor

threshold

Application note

150

kΩ

Tdgc_ON

Deglitch filter time in

ON condition

Test by scan

-25%

+25%

µs

Tdgc_OFF

Test by scan

-25%

125

+25%

µs

Tdgc_ol_on

Test by scan

-25%

+25%

µs

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