SANYO LA7852

Ordering number: EN2781B
Monolithic Linear IC
LA7852
CRT Display Synchronization Deflection Circuit
Overview
The LA7852 is a sync-deflection circuit IC dedicated to CRT
display use. It can be connected to the LA7832/7833, 7837/
7838 (for vertical output use) to form a sync-deflection circuit
that meets every requirement for CRT display use.
So far, ICs for color TV use have been applied to the syncdeflection circuit for CRT display use, and general-purpose ICs
such as one-shot multivibrator, inverter and a lot of transistors
have been used to form the peripherals such as sync input
interface, horizontal phase shifter. The LA7852 contains these
peripherals on chip and adopts a stable circuit for horizontal
oscillation from 15 kHz to 100 kHz aiming at improving the
characteristics required for CRT display use.
The LA7852 has independent GND pins for the horizontal
block and vertical block, thus facilitating pattern layout for
applications where the LA7852 is used at high frequencies.
Package Dimensions
unit : mm
3059-DIP22S
[LA7852]
SANYO : DIP22S
. The vertical pull-in range is approximately 10 Hz at
60 Hz.
. fvThe= horizontal
oscillation frequency can be adjusted stably
from 15 kHz to 100 kHz.
. The horizontal display can be shifted right/left.
. The horizontal/vertical sync input can be used intact
of the difference in pulse polarity and pulse width.
. regardless
The AFC feedback sawtooth wave can be obtained by
applying a flyback pulse to the IC as a trigger pulse.
. simply
Any duty of the horizontal pulse can be set.
. Good vertical linearity because DC bias at vertical output
is subjected to sampling control within retrace time.
. stage
Excellent interlace and vertical jitter characteristics on the
high-definition display because of independent GND pins for
the horizontal block and vertical block.
Allowable power dissipation, Pd max – mW
Features
Pd max – Ta
Ambient temperature, Ta – °C
Built-in Functions
[Horizontal Block]
[Vertical Block]
. AFC
. Horizontal OSC
. X-ray protector
. Horizontal phase shift
. AFC sawtooth wave generator
. Horizontal pulse duty setting
. Vertical OSC
. Vertical sawtooth wave generator
. Sampling type DC voltage control
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
81096HA(II)/9138YT/8228YT,TS No.2781-1/5
LA7852
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Maximum supply voltage
V11, V22
Allowable power dissipation
Pd max
Conditions
Ratings
Ta % 65° C
Unit
14
V
780
mW
Operating temperature
Topr
–20 to +85
°C
Storage temperature
Tstg
–55 to +125
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Recommended supply voltage
V11, V22
12
V
Operating voltage range
V11, V22
9 to 13.5
V
Recommended vertical pulse input peak value
VPULSE
5
Vp-p
Vp-p
Operating vertical pulse input peak value range
VPULSE
2 to 6
Recommended horizontal pulse input peak value
HPULSE
5
Vp-p
Operating horizontal pulse input peak value range
HPULSE
2 to 6
Vp-p
Operating Characteristics at Ta = 25°C, V11, V22 = 12 V
Parameter
VCC11 current dissipation
VCC22 current dissipation
Vertical frequency pull-in range
Vertical free-running frequency
Increased/reduced voltage
characteristic of vertical
frequency
Midpoint control
threshold level
Vertical OSC start voltage
Temperature characteristic of
vertical frequency
Vertical driver
amplification factor
Horizontal AFC DC loop gain
Horizontal free-running
frequency
Horizontal OSC start voltage
Increased/reduced voltage
characteristic of horizontal
frequency
Horizontal OSC warm-up drift
Temperature characteristic of
horizontal frequency
Horizontal output drive current
Increased/reduced voltage
characteristic of phase shifter
delay time
Temperature characteristic of
phase shifter delay time
Increased/reduced voltage
characteristic of phase shifter
delay time
Temperature characteristic of
phase shifter pulse width
AFC phase comparison center
time
Symbol
I11
I22
Vp IN
fv
∆fv-v
Conditions
Vertical sync 60 Hz
fv center 55 Hz
V22 = 12 ± 1 V, 55 Hz at 12 V
min
12
5
10.0
50
max
30
12
12.0
60
Unit
mA
mA
Hz
Hz
–0.1
+0.1
Hz
3.8
4.4
V
4.0
V
Fvcst
Ta = –10 to +60°C
Gv
IAFC+
IAFC–
fH
fH center 15.734 kHz
–0.028
∆fH
+0.028 Hz/°C
12
18
dB
0.85
–1.6
1.6
–0.85
mA
mA
–750
+750
Hz
4.0
V
fHcst
∆fHcv
typ
V11 = 12 ± 1 V, 15.734 kHz at 12 V
–50
+50
Hz
5 s to 30 min. after application of power
–50
+50
Hz
Ta = –10 to +60°C
–2.9
+2.9 Hz/°C
I13
6.0
12.0
mA
V11 = 12 ± 1 V
–0.5
+0.5
%/V
Ta = –10 to +60°C
–0.1
+0.1
%/°C
V11 = 12 ± 1 V
–1.0
+1.0
%/V
–0.13
+0.13
%/°C
9.9
11.5
Ta = –10 to +60°C
15.734 kHz after FBP input
µs
No.2781-2/5
Horizontal drive
pulse width setting
Horizontal drive output
X-ray protection input
Conditions
Horizontal power supply
Discharge resistor
Horizontal OSC
time constant
Horizontal ground
Vertical ground
Comparison voltage
generating capacitor
Symbol
AFC output
Vertical drive output
Vertical sawtooth wave
generation
FBP trigger input
Sawtooth wave
generating capacitor
Midpoint voltage control input
Vertical OSC time constant
Sync pulse width
time constant
NC
Vertical trigger input
Vertical power supply
Parameter
Increased/reduced voltage
characteristic of AFC phase
comparison center time
Temperature characteristic of
AFC phase comparison center
time
Comparison waveform
generating
input operation voltage
Pin 14 voltage at hold-down
operation start
Phase adjust time constant
Horizontal trigger input
LA7852
min
typ
max
Unit
V11 = 12 ± 1 V
–1.5
+1.5
%/V
Ta = –10 to +60°C
–0.2
+0.2
%/°C
V5
0.6
0.9
V
V14
0.5
0.8
V
Equivalent Circuit Block Diagram
No.2781-3/5
LA7852
Sample Application Circuit
14’’ Color Monitor / fv = 60 Hz, fH = 15.734 kHz
(Note)
Co is connected when
oscillation occurs in vertical
output in Sample Application
Circuit.
( ): Negative pulse
mode
VR2 is fixed after adjustment.
(Note) For the LA7853, the vertical pull-in range is
20 Hz at vertical sync 60 Hz.
Unit (resistance: Ω, capacitance: F)
No.2781-4/5
LA7852
Sample Application Circuit
14’’ Color Monitor / fv = 60 Hz, fH = 15.734 kHz
( ): Negative pulse mode
VR2 is fixed after adjustment
A05903
LA7850 Family
Type Number
LA7850
LA7851
LA7852
LA7853
Package
DIP-20S
(Slim Type)
DIP-20S
(Slim Type)
DIP-22S
(Shrink Type)
DIP-22S
(Shrink Type)
Vertical
pull-in range
(fv = 60 Hz)
10 Hz
20 Hz
10 Hz
20 Hz
Ground pin
Horizontal/vertical
common
horizontal/vertical
common
Horizontal/vertical
separated
Horizontal/vertical
separated
Differences in
characteristics
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 August, 1996. Specifications and information herein are subject to change without notice.
No.2781-5/5