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STV7778 Datasheet(PDF) 6 Page - STMicroelectronics

Part # STV7778
Description  DEFLECTION PROCESSOR FOR MULTISYNC MONITOR
PDF  11 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STV7778 Datasheet(HTML) 6 Page - STMicroelectronics

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HORIZONTAL SECTION (continued)
Electrical Characteristics (VCC = 12V, Tamb = 25°C)
Symbol
Parameter
Test conditions
Min.
Typ.
Max.
Unit
SUPPLY AND REFERENCE VOLTAGES
VCC
Supply Voltage
Pin 18
10.8
12
13.2
V
ICC
Supply Current
Pin 18, See Figure 1
40
60
mA
VREF-H
Reference Voltage for Horizontal Section
Pin 5
7.4
8
8.6
V
IREF-H
Max Sourced Current on VREF-H
Pin 5
2
mA
VREF-V
Reference Voltage for Vertical Section
Pin 26
7.4
8
8.6
V
IREF-V
Max Sourced Current on VREF-V
Pin 26
2
mA
INPUT SECTION/PLL1
VINTH
Hor Input Threshold Voltage Pin 17
Low level voltage
High level voltage
2
0.8
V
V
VVCO
VCO Control Voltage
VREF-H = 8V, Pin 12
1.6
6.2
V
VCOG
VCO Gain, dF/dV Pin 12
R0 = 6.49k
Ω, C0 = 680pF
15
kHz/V
Hph
Horizontal Phase Adjustment (Pin 15)
% of Hor period
±10
%
FFadj
Free Running Frequency Adjustment (Pin 14)
Without H-sync Signal
±20
%
CR
PLL1 Capture Range (F0 = 27kHz)
Fh Min
Fh Max
See conditions on Figure 1
70
28
kHz
kHz
PLLinh
PLL 1 Inhibition (Pin 35)
PLL ON
PLL OFF
V35
V35
2
0.8
V
SECOND PLL AND HORIZONTAL OUTPUT SECTION
FBth
Flyback Input Threshold Voltage
Pin 3
0.65
0.75
V
Hjit
Horizontal Jitter
150
ppm
HDmin
HDmin
Minimum Hor Drive Output Duty-cycle
Maximum Hor Drive Output Duty-cycle
Pin 20 or 21, V2 = 2V
Pin 20 or 21, V2 = 6V
45
30
50
35
%
%
HDvd
Horizontal Drive Low Level Output Voltage
V21-V20, Iout = 20mA,
Pin 20 to GND
1.1
1.7
V
HDem
Horizontal Drive High Level Output Voltage
(output on Pin 20)
Pin 21 to VCC, IOUT = 20mA
9.5
10
V
XRAYth
X-RAY Protection Input Threshold Voltage
Pin 16
1.6
1.8
V
ISblkO
Maximum Output Current on Safety Blanking
Output
I23
10
mA
VSblkO
Low-Level Voltage on Safety Blanking Output
V23 with I23 = 10mA
0.25
0.5
V
Vphi2
Internal Clamping Voltage on 2nd PLL Loop Filter
Output (Pin 1)
Vmin
Vmax
1.6
3.2
V
V
VOFF
Pin 2 Threshold Voltage to Stop H-out, V-out
B+out and to Activate S-BLK.OFF Mode when
V2 < VOFF
V2
1V
STV7778S
6/11



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