L9950 datasheet(6/39 Pages) STMICROELECTRONICS

6 / 39 page

Block diagram and pin description

L9950 - L9950XP

6/39

Doc ID 10311 Rev 10

Block diagram and pin description

Figure 1.

Block diagram

Table 2.

Pin definitions and functions

Symbol

Function

1, 18, 19, 36

GND

Ground.

Reference potential.

Important: for the capability of driving the full current at the outputs all

pins of GND must be externally connected.

2, 35

OUT11

Highside driver output 11.

The output is built by a highside switch and is intended for resistive

loads, hence the internal reverse diode from GND to the output is

missing. For ESD reason a diode to GND is present but the energy

which can be dissipated is limited. The highside driver is a power

DMOS transistor with an internal parasitic reverse diode from the

output to VS (bulk-drain-diode). The output is over-current and open

load protected.

Important: for the capability of driving the full current at the outputs both

pins of OUT11 must be externally connected.

OUT1

OUT2

OUT3

Charge

Pump

CM / PWM2

CSN

CLK

VCC

BAT

µC

GND

Lock

MUX

PWM1

OUT7

OUT8

100k

* Note: Value of capacitor has to be choosen carefully to limit the VS

voltage below absolute maximum ratings in case of an unexpected

freewheeling condition of inductive loads (e.g. TSD, POR)

** Note: Resistors between µC and L9950 are recommended to limit currents

for negative voltage transients at VBAT (e.g. ISO type 1 pulse)

+ Note: Using a ferrite instead of 10ohm will additionally improve EMC behavior

Reverse

Polarity

Protection

100µF

Safe Lock

100nF

VREG

100

100nF

EMC

Optimization

Exterior Light

Safety Light

OUT9

OUT10

OUT11

OUT4

OUT5

OUT6

Folder

xy-Mirror

Motors

Footstep Light

Turn Indicator

Defroster

L9950 数据表(PDF) 6 Page - STMicroelectronics

L9950 数据表(HTML) 6 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39

数据表下载