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| 型號(hào)： | TDA4780 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | RGB video processor with automatic cut-off control and gamma adjust |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁(yè)數(shù)： | 23/44頁(yè) |
| 文件大小： | 321K |
| 代理商： | TDA4780 |
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1997 Feb 06
23
Philips Semiconductors
Preliminary specification
RGB video processor with automatic
cut-off control and gamma adjust
TDA4780
C
LAMP PULSE DELAY
T
d(clamp)
delay of leading edge of clamping pulse
nominal sandcastle
pulse
DELOF = 0
DELOF = 1
1.2
1.5
0
1.8
μ
s
μ
s
R
EQUIRED MINIMAL BURST GATE PULSE WIDTH
t
W
DELOF = 0
DELOF = 1
line frequency: 16 kHz
line frequency: 32 kHz
3
1.5
μ
s
μ
s
Generation of measurement lines and blanking;
note 12
V/V
nom
V = VCL
VUB
difference between ultra black level
(VUB) and measurement level (VCL) in
percent of nominal signal amplitude
no clipping;
independent of white
point adjust
25
35
45
%
W
ARM UP TEST PULSE DURING
MT (see pulse diagram Fig.10)
V
WU
warm up level
V
WU
= V
PL
1 V;
V
PL
= peak drive level
(see also signal
limiting); given by
I
2
C-bus; subaddress
0AH; no warm up test
pulse in the event of
output clamping
(BCOF = 1)
I
2
C-bus data 3FH;
RELC = 0
RELC = 1
V
WU(max)
maximum warm up level
6.3
6.6
6.9
V
V
WU(fixed)
T
HRESHOLD FOR
P
OWER
O
N
R
ESET
(POR)
DURING TIME
DG (see pulse diagram Fig.10)
fixed warm up level
5.0
5.2
5.4
V
V
20, 22, 24(POR)
output voltage to cause POR
RELC = 0
RELC = 1
V
PL
5.7
V
V
Y output (pin 26;
note 13
)
V
26(nom)(p-p)
nominal signal amplitude (black-white;
independent of gamma, adaptive black,
saturation, contrast and brightness;
peak-to-peak value)
black level
control bit YEXH = 1;
hue DAC (subaddress
03H) set to >28H
0.85
1.0
1.15
V
V
26
YEXH = 1; I
2
C-bus
data 3FH
YEXH = 1; I
2
C-bus
data 20H
Y = a
r
R + a
g
G + a
b
B
Y = a
r
R + a
g
G + a
b
B
Y = a
r
R + a
g
G + a
b
B
4.0
V
2.0
V
a
r
a
g
a
b
Y matrix coefficients
Y matrix coefficients
Y matrix coefficients
0.27
0.53
0.10
0.30
0.59
0.11
0.33
0.65
0.12
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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