L9779WD datasheet(50/170 Pages) STMICROELECTRONICS

Part #	L9779WD

Description	Multifunction IC for engine management system

PDF	170 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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50 / 170 page

Functional description

L9779WD

50/170

DocID027452 Rev 5

6.8.2

MRD scenarios

Figure 23. Scenario 1a: Standard on/off MRD driver with NO power latch mode bit

PSOFF = 0

Table 18. Main relay driver electrical characteristics

Symbol

Parameter

Test condition

Min

Typ

Max Unit

MRD

RDS-on

Drain –source resistance

Iload = 0.4 A; Vbat = 0 &

13.5 V

2.4

Ω

IOUTlk MRD

Output leakage current

Vpin = 13.5 V; Vbat = 0 &

13.5 V

µA

VS/R

Voltage S/R on/off

R = 21

, C = 10 nF;

Vbat = 0 & 13.5 V

V/µs

Vcl

Output clamping voltage

Vbat = 0 & 13.5 V

Imax

Output current

Design info

0.6

IOVC

Over current threshold

Vbat = 0 & 13.5 V

0.7

1.4

TFILTEROVC

Over current filtering time

Test by SCAN

5.25

8.75

VB_UV

VB threshold for MRD

active

Vbat = 0 & 13.5 V

4.15

PWclampSP

Clamp single pulse ATE

test

Iload = 0.5 A; single pulse

PWclampRP

Clamp repetitive pulses

reliability test

Iload = 0.25 A

Freq =1 Hz; 1 Mpulse

L9779WD Datasheet(PDF) 50 Page - STMicroelectronics

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