Philips Semiconductors
Product specification
I2C-bus autosync deflection controller for
PC monitors
TDA4856
Printed-circuit board layout
further connections to other components
or ground paths are not allowed
handbook, full pagewidth
external components of
horizontal section
external components of
vertical section
pin 25 should be the 'star point'
for all small signal components
external components of
horizontal section
no external ground tracks
connected here
TDA4856
47 nF
2.2 nF
100 µF
47 pF
12 V
external components
of driver stages
B-drive line in parallel
to ground
only this path may be connected
to general ground of PCB
MGS283
SMD
For optimum performance of the TDA4856 the ground paths must be routed as shown.
Only one connection to other grounds on the PCB is allowed.
Note: The tracks for HDRV and BDRV should be kept separate.
Fig.29 Hints for printed-circuit board (PCB) layout.
45
1999 Jul 13
NXP [ NXP ]
