STAND

BY

OFF

OFF

ON

11

ON

01

DEVICE ON

CHECKS FOR

ERRORS 11

CHECKING

FOR ERRORS

01

CHECKING

FOR ERRORS

10

LOGIC

SELECTS

BRANCHE

DEPENDING

ON PREVIOUS

STATE

ON

CHECKING

FLYBACK 6

turn on

new telegram

no error

new telegram

new

telegram

new

telegram

new telegram current = 0

new

telegram

missing

flyback

different polar ity

shor t

to gnd

shor t to VS

no shor t

no shor t

same polarity as before

shor t to VS

short

to gnd

shor

t

to

gnd

shor t

to VS

shor

t

to

VS

shor

t to

gnd

short

to VS

shor

t to

gnd

new telegram

same polarity

flyback OK

or reverse polarity

than before

D99AT441

Figure 11. State diagram.

Remark: Return to stand by is possible from every state

Note: Reversing polarity in low current mode no flyback check will be performed.

Electromagnetic Emission classification(EME)

Electromagnetic Emission classes presentel below are typical data found on bench test. For detailed test

description please refer to ’Electromagnetic Emission (EME) Measurement of Integrated Circuits, DC to

1GHz’ of VDE/ZVEI work group 767.13 and VDE/ZVEI work group 767.14 or IEC project number 47A

1967Ed. This data is targeted to board designers to allow an estimation of emission filtering effort re-

quired in application.

Pin

EME class

Remark

GND

E

10

o

1

Ω test

E

e

Blocked with 100nF close to the device

EN, SDI, CSN, SCK, SDO in tristate

K

h

SDO

G

f

SDO in low-state, no data transfer

E

5

f

Sourcing output

6

f

Sinking output in chopping mode fOSC = 20kHz

Electromagnetic Emission is not tested in production.

L9935

16/19