November 1987

11

Philips Semiconductors

Product specification

Video control combination circuit with

automatic cut-off control

TDA3507

Notes

1.

< 115 mA after warm-up.

2. Values are proportional to the supply voltage.

levels of the internal RGB signals.

DC voltage (correct clamping of the external RGB signals is possible only when they are synchronous with the

sandcastle pulse).

4. When pins 21, 22 and 23 are not connected, an internal bias voltage of 5,5 V is supplied.

5. Automatic cut-off control measurement occurs in the following lines after start of the vertical blanking pulse:

line 12: measurement of leakage current (R

+ G + B)

line 13: measurement of red cut-off current

line 14: measurement of green cut-off current

line 15: measurement of blue cut-off current

6. Black level of the measured channel is nominal; the other two channels are blanked to ultra-black.

7. All three channels blanked to ultra-black.

The cut-off control cycle occurs when the vertical blanking part of the sandcastle pulse contains more than 3 line

pulses.

The internal blanking continues until the end of the last measured line.

The vertical blanking pulse is not allowed to contain more than 34 line pulses, otherwise another control cycle begins.

the various pulses.

9. Blanked to ultra-black (

−25%).

10. Pulse duration

≥ 3,5 µs.

Difference in gain between

normal mode and signal insertion

mode

−−

10

%

Sandcastle pulse detector

(pin 10)

note 8

Levels for separating the

following pulses:

horizontal and vertical

blanking pulses

note 9

1,0

1,5

2,0

V

required pulses (H

+V)

2,1

2,5

2,9

V

horizontal pulses

3,0

3,5

4,0

V

required pulses (H)

4,1

4,5

5,0

V

clamping pulses

note 10

6,5

7,0

7,5

V

required pulses

7,6

−

12,0

V

no keying

−−

1,0

V

Input current

−−

110

µA

PARAMETER

CONDITIONS

SYMBOL

MIN.

TYP.

MAX.

UNIT