TDA9106 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'TDA9106' PDF : 30 Pages View PDF
TDA9106
OPERATING DESCRIPTION (continued)
Figure 16 : Output stage simplified diagram,
showing the two possibilities of
connection
21 VCC
20
VCC
H-DRIVE
21
H-DRIVE
20
The maximum output current is 20mA, and the
correspondingvoltagedrop of theoutput darlington
is 1.1V typically.
It is evident that the power scanning transistor
cannot be directly driven by the integrated circuit.
Figure 17 : Safety Functions Block Diagram
VCC Checking
VCC
Ref
An interfacehas to be designed between the circuit
and the power transistor which can be of bipolar or
MOS type.
II.5 - X-RAY Protection
The activation of the X-Ray protection is obtained
by application of a high level on the X-Ray input
(Pin 15 > 8V). The consequenciesof X-Ray protec-
tion are :
- inhibition of H-Drive output
- activation of horizontal blanking output.
- activation of vertical blanking output.
The reset of this protection is obtained either by
VCC switch off or I2C resetby MCU (see Figure 17).
II.6 - Horizontal Dynamic Focus
TDA9106 delivers an horizontal parabola wave
form on Pin 17. This parabola is performed from a
sawtoothin phase with flybackpulse.Thissawtooth
is present on Pin 16 where the horizontal focus
capacitor is the same as C0 to obtain a controlled
amplitude (from 2 to 4.7V typically).
Symmetry (keystone) and amplitude areI2C adjust-
able (see Figure 18).This signal has to be con-
nected to the CRT focusing grids and mixed with
vertical dynamic focus.
I2C Drive on/off
HORIZONTAL
OUTPUT
INHIBITION
XRAY Protection
XRAY
VCC off or I2C Reset
SQ
R
I2C Ramp on/off
VERTICAL
OUTPUT
INHIBITION
Horizontal Flyback
0.7V
I2C SFME
Horizontal Unlock
Horizontal Free Running Detection
I2C Blanking
HORIZONTAL
BLANKING
OUTPUT
Vertical Flyback
Vertical Sync
Vertical Sawtooth Retrace
Vertical Free Running Status
Vertical Unlock
I2C Ramp on/off
LOGIC
BLOCK
VERTICAL
BLANKING
OUTPUT
22/30
Share Link: 
