L9960T datasheet(57/95 Pages) STMICROELECTRONICS

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DS11115 Rev 10

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L9960, L9960T

Functional description

4.7.3

Short-circuit to battery: over-current detection in low-side transistors

Figure 25. Example of low-side transistor low impedance short circuit to battery

(I < Ioc_ls)

The low-side transistors are protected against over-current due to an output short-circuited

to battery. When a low-side transistor is switched on, the current is monitored and if the low-

side over-current threshold "Ioc_ls" is overtaken for duration longer than "Toc_ls", the

bridge is switched to disable. This information is stored and latched in bits called "OCL_x".

The bits "OCL_x" are reset and the bridge is released when diagnostics is read by SPI (if

DIAG_CLR_EN=1 only), or by DIS level change (falling edge) or by RESET.

TTSD

Over-temperature filtering

time

Guaranteed by clock

measurement

1.7

2.3

µs

Tsecure

Time out to decrease Ilim

Guaranteed through scan

1.5

Tsdoff

Over-temperature shutdown

release time

Filter on OTSD release

(guaranteed through scan)

100

110

OTsd-

OTwarn

Rang of temperature

dependent current reduction

-20

°C

Tj_range

Junction temperature analog

output range

125

190

°C

Tj_acc

Junction temperature analog

output accuracy

Guaranteed through scan

°C

TOT_warn

Temperature warning filtering

time

-1

µs

Table 70. Over-temperature monitoring electrical characteristics (continued)

Symbol

Parameter

Condition

Min.

Typ.

Max.

Unit

Battery

OUT2

OUT1

GND

motor

Rshort

OFF

current

GAPGPS02344

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