L9959S datasheet(18/43 Pages) STMICROELECTRONICS

18 / 43 page

Electrical specifications

L9959S, L9959T

18/43

DocID023416 Rev 6

3.6

Temperature dependent current reduction

Note: see also Figure 16: Temperature dependent current reduction.

3.7

Free-wheeling diodes

Table 16. Openload detection

If the value of the connected load is below 2.5 k

, no Open Load is detected; if the value of the

connected load is more than 50 k

, Open Load is detected.

If the load is in the range between (2.5 … 50) k

, the Open Load diagnosis is not reliable.

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

ROL

Openload detection threshold

-5



tDIAGOL

Openload diagnosis enable

delay

Guaranteed through

scan.

100

150

tDIAGOL1

Openload diagnosis filter time1

2.4

3.6

tDIAGOL2

Openload diagnosis filter time2

200

300

µs

Table 17. Retest delay

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

tdelay retest

Retest delay for failures: SCB,

SCG, SCL

Guaranteed through

scan.

290

350

410

µs

Table 18. Temperature dependent current reduction

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

|IL_TSD|

Current limit at TSD

1.4

2.5

3.6

TILR

Start of temperature

dependent current reduction

150

165

°C

TSD

Thermal shut-down

175

°C

TSD-TILR

Range of temperature

dependent current reduction

2025

30°C

TfTSD

Thermo-shut-down detection

filter time

Guaranteed through

scan.

µs

Table 19. Free-wheel diodes

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

Free-wheeling diode forward

voltage

IOUT = 3 A

Tit

(1)

Free-wheeling diode reverse

recovery time

100

Not subject to production test; specified by design.

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