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Sanyo

LA7835 Datasheet

Vertical Deflection Output Circuit with Driver for Color TV Use


LA7835 Datasheet Preview


Ordering number:ENN2863
Monolithic Linear IC
LA7835
Vertical Deflection Output Circuit
with Driver for Color TV Use
Overview
The LA7835 is an IC that contains the vertical deflection
output circuit with a driver for small-aperture (maximum
deflection current 1.8Ap-p) color/B&W TV, monitor/dis-
play use and is placed in a SIP13H package. The LA7835
has such features as greatly reduced number of external
parts and low power dissipation. Since both DC feedback
and AC feedback can be provided inside the IC, it is easy
to design the vertical deflection circuit. The LA7835 can
be used in conjunction with single-chip IC LA7650 (NTSC),
LA7680 series (PAL/NTSC) (VIF, SIF, video, chroma, and
deflection circuit) to provide all the functions required for
color TV signal processing.
Package Dimensions
unit:mm
3107-SIP13H
[LA7835]
25.6
3.4 10.0
2.0
2.4
Features
• Low power dissipation because of on-chip pump-up cir-
cuit.
• On-chip 50/60Hz vertical size control circuit.
• On-chip ramp generator.
• On-chip driver circuit.
• Vertical output circuit.
• On-chip thermal protection circuit.
• Minimum number of parts required.
1
0.8 2.0
0.5
13
0.4
1.15 1.2
SANYO : SIP13H
Specifications
Maximum Ratings at Ta = 25˚C
Parameter
Driver power supply voltage
Pump-up power supply voltage
Output power supply voltage
Deflection output current
Allowable power dissipation
Operating temperature
Storage temperature
Thermal resistance
Symbol
Conditions
+VCC1 max
+VCC7 max
+VCC12 max
IDEF
Pd max
With infinite heat sink
Topr
Tstg
θj-c
Ratings
15
30
62
–1.5 to +1.5
8
–20 to +85
–40 to +150
4
Unit
V
V
V
Ap-o
W
˚C
˚C
˚C/W
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
12501TN (KT)/90196RM No.2863–1/5
Page 1

LA7835
Operating Supply Voltage Conditions
Parameter
Driver supply voltage
Pump-up supply voltage
Symbol
+VCC1
+VCC7
Conditions
Recommended Operating Conditions
Parameter
Driver supply voltage
Pump-up supply voltage
Deflection output current
Symbol
+VCC1
+VCC7
I11p-p
Conditions
Operating Characteristics at Ta = 25˚C, +VCC1=12V, +VCC7=24V
Parameter
Symbol
Conditions
Driver power supply quiescent current
Trigger input threshold voltage
Vertical size control pin voltage
Ramp waveform shape start voltage
Pump-up charge saturation voltage
Pump-up discharge saturation voltage
Deflection output saturation voltage (lower)
Deflection output saturation voltage (upper)
Idling current
Voltage gain
ICC1
V2
V3
VRAMP
VS8-10
VS7-8
VS11-10
VS12-11
I=0.9A
I=0.9A
I=0.9A
VGO f=1kHz
Pin Assignment and Block Diagram
Ratings
8 to 14
10 to 27
Unit
V
V
Ratings
(9) 12
24
up to 1.8
Unit
V
V
Ap-p
Ratings
min typ
1.8 2.8
2.8 3.1
5.9 6.1
4.7 5.0
16 22
59
max
3.8
3.4
6.3
5.3
1.5
3.0
1.2
3.2
32
Unit
mA
V
V
V
V
V
V
V
mA
dB
No.2863–2/5
Page 2

Equivalent Circuit
LA7835
Sample Application Circuit
Note) The values in parentheses are for a sample application where the VCC1 is 9V.
No.2863–3/5
Page 3

Proper Cares in Using the LA7835
LA7835
Note 1) If horizontal components are mixed into pin 1, causing the interlace characteristic to worsen, provide
decoupling as shown above. The resistor value and capacitor value are shown as an example.
2) If oscillation occurs, connect the OSC blocking circuit as shown above.
However, if the deflection current increases, oscillation may not be blocked completely. In this case, change
the application circuit as shown below.
3) In some applications, the OSC blocking capacitor across pins 9 and 11 is connected across pin 9 and GND.
4) The threshold voltage on pin 2 is +VCC11/4. Set the input trigger level so that it intersects this threshold level.
The LA7835 operates on the negative transition of the trigger pulse.
5) Connect the radiator fin to GND.
No.2863–4/5
Page 4
Part Number LA7835
Manufactur Sanyo
Description Vertical Deflection Output Circuit with Driver for Color TV Use
Total Page 5 Pages
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