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參數(shù)資料
| 型號(hào)： | TDA3505 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Video control combination circuit with automatic cut-off control(帶自動(dòng)截止電路的視頻控制匯編電路) |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大小： | 143K |
| 代理商： | TDA3505 |
November 1987
12
Philips Semiconductors
Product specification
Video control combination circuit with automatic
cut-off control
TDA3505
TDA3506
Notes
1.
2.
3.
<
110 mA after warm-up.
Values are proportional to the supply voltage.
When V
11-24
< 0,4 V during clamping time - the black levels of the inserted RGB signals are clamped on the black
levels of the internal RGB signals.
When V
11-24
> 0,9 V during clamping time - the black levels of the inserted RGB signals are clamped on an internal
DC voltage (correct clamping of the external RGB signals is possible only when they are synchronous with the
sandcastle pulse).
When pins 21, 22 and 23 are not connected, an internal bias voltage of 5,5 V is supplied.
Automatic cut-off control measurement occurs in the following lines after start of the vertical blanking pulse:
line 20: measurement of leakage current (R
+
G
+
B)
line 21: measurement of red cut-off current
line 22: measurement of green cut-off current
line 23: measurement of blue cut-off current
Black level of the measured channel is nominal; the other two channels are blanked to ultra-black.
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 sandcastle pulse is compared with three internal thresholds (proportional to V
P
) and the given levels separate
the various pulses.
Blanked to ultra-black (
25%).
10. Pulse duration
≥
3,5
μ
s.
4.
5.
6.
7.
8.
9.
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