L9952XP datasheet(41/68 Pages) STMICROELECTRONICS

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L9952GXP

Electrical characteristics

Doc ID 13518 Rev 5

41/68

7.10

Wake up inputs ( WU1..WU4)

The voltages are referred to GND and currents are assumed positive, when the current

flows into the pin. 6V < VS < 18V; Tj = -40 to 130 °C, unless otherwise specified.

7.9.6

tSCF

Short circuit filter time

Tested by scan

chain

64*

TOSC

7.9.7

Slew Rate

0.2

V/µs

The output is capable to switch off relay coils with the impedance of RL=160

Ω; L = 300mH

(RL=220

Ω; L= 420mH); at VS = 40V (Load dump condition)

Table 19.

Relay drivers (continued)

Item

Symbol

Parameter

Test condition

Min.

Typ. Max. Unit

Table 20.

Wake up inputs(1)(WU1...WU4)

Defines whether the inputs W1..4 are configured with current source or current sink in standby mode.

Item

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

7.10.1

VWUthp

Wake-up negative

edge threshold voltage

0.4 Vs

0.45 Vs

0.5 Vs

7.10.2

VWUthn

Wake-up positive edge

threshold voltage

0.5 Vs

0.55 Vs

0.6 Vs

7.10.3

VHYST

Hysteresis

0.05 Vs

0.1 Vs

0.15 Vs

7.10.4

tWU

Minimum time for

wake-up

µs

7.10.5

IWU_stdby

Input current in standby

mode

1.5V<VIN< (Vs-3V)

µA

7.10.6

RWU_act

Input resistor to GND in

active mode and in

standby mode during

wake-up request

100

275

450

7.10.7

Number of samples

During OUT_HS

on, cyclic sense

mode (100us

cyclic HS on time)

2 (at 80µs and 100µs)

7.10.8

Vwuthl

Pending wake up

request low threshold

1.0

1.25

1.5

7.10.9

Vwuthh

Pending wake up

request high threshold

Vs-3

Vs-2.2

Vs-1.4

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