NCV7428

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3

Application Information

KL30

LIN−BUS

KL31

VBAT

GND

LIN

MCU

EN

RxD

TxD

RSTN

LIN

GND

GND

VBAT

GND

LIN

MCU

EN

RxD

TxD

RSTN

LIN

GND

GND

Figure 2. Example Application Diagram

External Components

Overview of external components from application schematic in Figure 2 is given in Table 2 together with their recommended

or required values.

Table 2. EXTERNAL COMPONENTS OVERVIEW

Component

Name

Description

Value

Note

Reverse polarity protection diode

parameters application−specific;

e.g. 0.5 A / 50 V

required values and types

and the application needs

Filtering capacitor for the battery input

recommended >100 nF ceramic

Voltage regulator output filtering and

stabilization capacitor

> 1.8

mF, ESR < 7 W

Master node Pull−up diode on LIN line

required only for master

LIN node

Master node Pull−up resistor on LIN line

1 k

W nominal, ≥500 mW

Filtering capacitor on LIN line (Master node)

typically 1 nF

optional; is function of the

entire LIN network

Filtering capacitor on LIN line (Slave node)

typically 100 pF – 220 pF

optional; is function of the

entire LIN network

Pull−up resistor at RSTN pin

recommended 10 k

W nominal

optional; depends on

application needs