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Электронный компонент: LA7626

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Video, Chroma and Deflection Circuit for
Color Television Sets
Overview
The LA7625 and LA7626 are based on the LA7620 and
LA7621 with the video circuit DC restoration factor changed
to 100%. The LA7625 and LA7626 are small, multifunction
ICs in which video, chroma and deflection circuits for NTSC
color TV system are packaged in a shrink-type DIP30S (the
same type as the earlier DIP22). In addition to being small,
these ICs greatly reduce the number of components required
and reduce the number of adjustments that must be made. By
combining the LA7625 or LA7626 with the LA7555 or
LA7577 VIF/SIF IC, or LA7832, LA7833, LA7837, or
LA7838 vertical output IC, it is possible to process all
functions of the color television signal system. Note that the
LA7625 has a peak clipping circuit built into the video circuit,
and is suited primarily for compact sets, while the LA7626
does not have a peak clipping circuit and is suited for larger
sets.
Features
.
Small package
.
Few peripheral components needed.
.
Few adjustments needed.
(The functions listed below require no adjustments.)
.
Chroma VCO (APC)
.
Horizontal oscillation H-Hold
.
Vertical oscillation V-Hold
.
Multifunctional.
Package Dimensions
unit : mm
3061-DIP30S
[LA7625,7626]
SANYO : DIP30S
Specifications
Maximum Ratings
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
16
max
14.0
V
Maximum supply current
I
22
max
15.0
mA
Allowable power dissipation
Pd max
Ta
%
65 C
1100
mW
Operating temperature
Topr
20 to +85
C
Storage temperature
Tstg
55 to +125
C
Ordering number: EN 2289B
Monolithic Linear IC
LA7625, 7626
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
62095HA (II) No.2289 - 1/6
Operating Conditions
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
V
16
12.0
V
Recommended supply current
I
22
10.0
mA
Operating supply voltage range
V
16
op
9.0 to 14.0
V
Operating supply current range
I
22
op
8.5 to 15.0
mA
Electrical Characteristics
at Ta = 25 C, V
CC
= V
16
= 12 V, I
CC
= I
22
= 10 mA
Parameter
Symbol
Conditions
min
typ
max
Unit
Circuit current
I
16
No signal
40
53
75
mA
[Deflection block]
Horizontal supply voltage
V
Z22
8.2
8.7
9.2
V
Sync separation input DC level
V
S.S
9.0
9.3
9.6
V
Vertical free-running
frequency 1
f
V
1
f
H
/296.5
Hz
f
V
2
f
H
/224.5
Hz
Vertical blanking pulse width
PW V.blk
19.25/f
H
s
Vertical output pulse width
PW V.out
10.25/f
H
s
Vertical drive stage voltage gain
G
V
13
16.2
19
dB
Vertical output pulse start
voltage
Vcds
4.0
V
Vertical pull-in operation start
voltage
Vvps
4.0
V
Vertical blanking pulse wave
peak value
VV.blk
10
V
Horizontal free-running
frequency
f
H
Frequency deviation versus 15.734 kHz
70
0
130
Hz
Dependence of horizontal
oscillation frequency on
supply voltage
f
H
(V)
f
H
(8V)f
H
(7V)
10
0
10
Hz
Dependence of horizontal
oscillation frequency on
operating temperature
f
H
/
T
T
a
= 10 C to 60 C
1.5
1.5
Hz/deg
Horizontal output pulse width
PW Hout
23.5
24.5
25.5
s
Horizontal sync pull-in
frequency range
f
H
pull
Differential versus 15.734 kHz
400
Hz
500
Hz
Horizontal output pulse start
voltage
V
H
pos
5.5
V
Horizontal free-running
frequency drift with time
f
HT
for 5 seconds to 30 minutes after power is applied
50
10
30
Hz
Hotizontal blanking
threshold level
V
H
.blk
11
V
Horizontal output drive current
I
H.O
2.0
4.5
mA
Horizontal oscillation control
sensitivity
B
fH
Reference value only (i.e. not specified)
236
Hz/A
Hold-down operation start
voltage
V
HD
0.55
0.65
0.75
V
[Video block]
Video tone
control characteristics 1
RE1
f = 2 MHz,
Video tone VR: 0 V
5
3
1
dB
Video tone
control characteristics 1
RE2
f = 2 MHz,
Video tone VR: 12 V
12
15
18
dB
Video voltage gain
AV
f = 100 kHz,
Video tone VR: 5.5 V
12
15
18
dB
Contrast control center
eo
f = 100 kHz, input: 100 mVp-p
0.2
0.3
0.4
Vp-p
Contrast variable range
eo
f = 100 kHz
16
18
20
dB
Bright control characteristics 1
BR1
No signal, bright VR: 3 V
8
V
Bright control characteristics 2
BR2
No signal, bright VR: 6 V
5.8
6.3
6.8
V
Bright control characteristics 3
BR3
No signal, bright VR: 9 V
4.5
V
Frequency response
f
f = 5 MHz/f = 100 kHz
5
dB
DC restoration factor
R
DC
STAIR STEP signal reference value
100
%
Continued on next page.
LA7625, 7626
No.2289 - 2/6
Continued from preceding page.
Parameter
Symbol
Conditions
min
typ
max
Unit
[Chroma Block]
ACC amplitude characteristics 1
ACC1
Input: +6 dB
3
0
+3
dB
ACC amplitude characteristics 2
ACC2
Input :20 dB
7
+2
dB
ACC phase characteristics 1
ACC
1
Input: +6 dB
3
+3
deg
ACC phase characteristics 2
ACC
2
Input: 20 dB
7
+7
deg
Killer operating point
EK
55
46
40
dB
Color control center
B-Ycen
Output B-Y: color VR 6 V
2.9
4.3
5.5
Vp-p
Maximum demodulation output
B-Ymax
Output B-Y: color VR 12 V
5.5
6.5
Vp-p
Color contrast variable range
Gcont
Output B-Y
15.5
17.0
18.5
dB
Tint center
Tcen
Output B-Y: tint VR 6 V
17
5
+7
deg
Tint variable range
T
Output B-Y
+45
35
deg
APC pull-in range
f APC
300
Hz
Demodulation output ratio 1
R-Y/B-Y
0.81
0.90
0.98
Demodulation output ratio 2
G-Y/B-Y
0.24
0.30
0.38
Demodulation angle 1
R-Y/B-Y
Tint VR 6 V
96
104
112
deg
Demodulation angle 2
R-Y/B-Y
Tint VR 6 V
132
122
112
deg
Color difference output DC
voltage
V9,10,11
6.7
7.2
7.7
V
Color difference output DC
deviation voltage
V9,10,11
200
+200
mV
LA7625, 7626
No.2289 - 3/6
Block Diagram of Equivalent Circuit Block and Examples of Peripheral Circuits
Unit (resistance:
, capacitance: F)
2nd
Countdown
1st
Countdown
X-ray
Protector
Hor.
Predriver
LA7625, 7626
No.2289 - 4/6
Vertical output IC (LA7832, 7833) connection circuit example
Includes vertical stabilization circuit
Vertical output IC (LA7837, 7838) connection circuit example
The following family of color TV NTSC system Y, chroma, and deflection ICs has been developed, each with different functions
and characteristics. Select the IC that best suits the application and purpose for which the color TV set is intended.
Type number
Peak clipping
DC restoration
factor
Secondary differential
circuit input polarity
Video tone
Remarks
Soft
Sharp
LA7620
O
70%
Positive polarity
O
O
LA7621
X
70%
Positive polarity
O
O
LA7625
O
100%
Positive polarity
O
O
LA7626
X
100%
Positive polarity
O
O
LA7629
X
100%
*Negative polarity
X
O
Video band 10MHz
* : Requires inverting amplifier
Vertical stabilization circuit
Unit (resistance:
, capacitance: F)
Unit (resistance:
)
LA7625, 7626
No.2289 - 5/6
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume
production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use
or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of June, 1995. Specifications and information herein are subject to change without notice.
LA7625, 7626
No.2289 - 6/6