HAL855
DATA SHEET
4.6. EMC and ESD
For applications with disturbances by capacitive or
inductive coupling on the supply line or radiated distur-
bances, the application circuits shown in Fig. 4–1 on
page 27 are recommended. Applications with this
arrangement should pass the EMC tests according to
the product standards ISO 7637 part 1 to part 3.
Please contact Micronas for the detailed investigation
reports with the EMC and ESD results.
Note: Micronas recommends to supply the HAL855
with a stabilized 5 V supply.
4.7. Start-Up Behavior
4.7.1. First Operation (Power-Up)
VDD
First PWM/Biphase-M signal starts
5 V
VDD,UVmin.
3 V
time
tPOD
VOUT (3-wire mode)
Output undefined
Biphase-M
format
The first period contains
no valid data
Output undefined
time
PWM format
No valid signal
Fig. 4–5: Power-up diagram
Valid signal
Note: The first PWM-period respectively the first Biphase-M protocol is not valid.
30
Nov. 26, 2008; DSH000149_003EN
Micronas
MICRONAS [ MICRONAS ]
