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參數資料
| 型號： | 935224770557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | PLASTIC, SOT-319, QFP-64 |
| 文件頁數： | 35/75頁 |
| 文件大小： | 522K |
| 代理商： | 935224770557 |
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1997 Jul 01
40
Philips Semiconductors
Preliminary specication
I2C-bus controlled economy PAL/NTSC
and NTSC TV-processors
TDA837x family
Notes
1. On set AGC.
2. This parameter is not tested during production and is just given as application information for the designer of the
television receiver.
3. Loop bandwidth BL = 60 kHz (natural frequency fn = 15 kHz; damping factor d = 2; calculated with sync level as FPLL
input signal level). LC-VCO circuit: Q0 ≥ 60, Cext = 12 pF, Cint =20pF.
4. This parameter is not tested during production but is guaranteed by the design and qualified by means of matrix
batches which are made in the pilot production period.
5. Measured at 10 mV (RMS) top sync input signal.
6. So called projected zero point, i.e. with switched demodulator.
B
bandwidth of output signals
RGB input at
3dB
8
MHz
CVBS input at
3 dB;
fosc = 3.6 MHz
2.8
MHz
CVBS input at
3 dB;
fosc = 4.44 MHz
3.5
MHz
S-VHS input; at
3dB
5
MHz
WHITE-POINT ADJUSTMENT
I2C-bus setting for nominal gain
HEX code
20H
Ginc(max)
maximum increase of the gain
HEX code 3FH
40
50
60
%
Gdec(max)
maximum decrease of the gain
HEX code 00H
35
45
55
%
BLACK CURRENT STABILIZATION (PIN 18); note 48
Ibias
bias current for the picture tube
cathode
nominal white point setting
10
A
IL
acceptable leakage current
±100
A
Iscan(max)
maximum current during scan
0.3
mA
Zi
input impedance
15
k
BEAM CURRENT LIMITING/VERTICAL GUARD INPUT (PIN 22); note 49
VCR
contrast reduction starting
voltage
3.1
V
VdifCR
voltage difference for full
contrast reduction
2
V
VBR
brightness reduction starting
voltage
1.6
V
VdifBR
voltage difference for full
brightness reduction
1
V
Vbias
internal bias voltage
3.3
V
Zint
internal impedance
40
k
Vdet
detection level for vertical guard
3.65
V
Ii(min)
minimum input current to
activate the guard circuit
100
A
Ii(max)
maximum allowable input
current
1
mA
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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