L9826

10/12

APPLICATION INFORMATION

The typical application diagram is shown in Fig. 5.

Figure 5. Typical Application Circuit Diagram for the L9826 Circuit.

For higher current driving capability two outputs of the same kind can be paralleled. In this case the maximum

flyback energy should not exceed the limit value for single output.

The immunity of the circuit with respect to the transients at the output is verified during the characterization for

Test Pulses 1, 2 and 3a, 3b, DIN40839 or ISO7637 part 3. The Test Pulses are coupled to the outputs with

200pF series capacitor. All outputs withstand testpulses without damage.

The correct function of the circuit with the Test Pulses coupled to the outputs is verified during the characteriza-

tion for the typical application with R = 30

Ω to 100Ω, L= 0 to 600mH loads. The Test Pulses are coupled to the

outputs with 200pF series capacitor.

CC

V

BAT

V

R, L loads

µP

L9826

L9826

VOLTAGE

REGULATOR

NCS

SDI

CLK

SDO

NON1

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

GND

Diag1

Diag8

nRES

Q1

CH1

Diag1

+

-

CH7

Diag7

Q7

Q1

Q8

CH3

Diag3

Q3

+

-

CH4

CH5

CH6

CH2

NON2

Diag2

Diag4

Q4

Diag5

Q5

Diag6

Q6

Q8

CH8

Diag8

Fault Latch

Q2

Reset

R

S

Latch / Driver

Reset

Undervoltage

RE SET

3

1

2

S

R

Latch / Driver

Q2

Q3

Q4

Q5

Q6

Q7

Diag2

Diag3

Diag4

Diag5

Diag6

Diag7

VCC

VCC

VCC

VCC

VCC

VCC

VCC

VCC

VDG

IOL

IOL

VDG

Overtemperature Detection