datasheetbank_Logo
Integrated circuits, Transistor, Semiconductors Search and Datasheet PDF Download Site

TDA8218 View Datasheet(PDF) - STMicroelectronics

Part Name
Description
View to exact match
TDA8218 Datasheet PDF : 9 Pages
1 2 3 4 5 6 7 8 9
TDA8218
Line output (Pin 17)
It is an open-collector output. The output positive
pulse time is 28µs for a 64µs period. The oscillator
thresholds are internally fixed by resistors. The
oscillator is synchronized during the last half free
run period. The input current during the charge of
the capacitor is less than 100nA.
Frame output amplifier
This amplifier is able to drive directly the frame
yoke. Its output is short circuit and overload pro-
tected; it contains also a thermal protection.
The line flyback detection is provided by a compa-
rator which compares the input line flyback pulse
to an internal reference. The burst gate pulse posi-
tion is fixed by the external RC network (pin 14). It
Figure 6 : Frame Oscillator
is referenced to the middle of the line flyback.
The frame blanking generator is a monostable with
external R.C. The start blanking pulse is triggered
by the falling edge of the frame saw-tooth (Pin 2).
The reset is provided by a comparator which com-
pares the capacitor voltage during its charge to an
internal threshold fixed by resistors.
The frame blanking time is defined by :
Tfb = 0.613 R.C.
This pulse is available on Super Sand Castle output
(Pin 19).
Remark : For compatability with TEA5640, frame
blanking time must be larger than 1.15ms with
centered value @ 1.35ms (R = 100k± 1%,
C = 22nF ± 5%)
Vcc1
INPUT CURRENT
COMPENSATION
2
Frame
sync pulse
To frame amplifier
Figure 7 : Super sandcastle generator
Vcc1
R
Vcc1
C
BurstKey
RC
Network
Line
Flyback
Input
18
Line
Flyback
Detection
Frame
8
Blanking
Generator
14
Σ
Burst gate
pulse
generator
Vcc1
RC
19
SSC
Output
7/9
 

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]