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TDA1770ASTN/a5avaiVERTICAL DEFLECTION CIRCUIT


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TDA1770A
VERTICAL DEFLECTION CIRCUIT
fi:e'rff' S(GSMrRl0)UilS(0R]
fir/l [ieill](C)R]C(j)EL,E(CnTcilC(jyillilCS
TDA177OA
VERTICAL DEFLECTION CIRCUIT
The functions incorporated are :
n SYNCHRONIZATION CIRCUIT
u PRECISION OSCILLATOR AND RAMP
GENERATOR
1: POWER OUTPUT AMPLIFIER
n FLYBACK GENERATOR
n VOLTAGE REGULATOR
n PRECISION BLANKING PULSE GENERATOR
n THERMAL SHUT DOWN PROTECTION
a CRT SCREEN PROTECTION CIRCUIT WHICH
BLANKS THE BEAM CURRENT IN THE EVENT
OF LOSS OF VERTICAL DEFLECTION CUR-
DESCRIPTION
The TDA 1770A is a monolithic integrated circuit in
20-Iead plastic package. It is a full performance and
very efficient vertical deflection circuit intended for
direct drive of the yoke.
It offers a wide range of applications in portable
CTVs, BW TVs, monitors and displays.
CONNECTION DIAGRAM (top view)
ADVANCE DATA
The TDA 1770 A is assembled in a new 20-lead
plastic package which has 4 centre pins connected
together and used for heatsinking.
DlP-20
ORDER CODE .' TDA1770A
BLANKING OUTPUT
SUPPLY (o)
FLYBACK
GROUND 5
a_l—I l—Ifi HE
GROUND 6
AMPLIFIER OUTPUTE 7
AMPLIFIER SUPLLYE 8
OSCILLATOR t 9
OSCILLATOR t 10
20 , AMPLIFIER INPUTf-1
19 l AMPLIFIER INPUT(+)
15g RAMP OUTPUT
17] RAMP GENERATOR
16 J GROUND
15 ] GROUND
11.] HEIGHT ADJUST.
l N.C.
12 l OSCKLLATOR
1 1 SYNC. INPUT
October 1988
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
TDA1770A
BLOCK DIAGRAM
BLANKING , I I i) 's
tyr'---, ----n, 2 I I "------
722 BAL
BLANK 3
GENERATOR _.. VOLTAGE FLVBACK A
AND cm REGULATOR GENERATOR -
PR01’ECUON 1
P J” - _
Av A r R3 h Rt.
---- - - l
F,, 7 t r L
_ " IO OSCILLAIoa te- A CLOCK n\ '
L, GENERATOR PULSE AMP. "
i T o l -
i 9 __L Rt Rt J
: “I L v SYNC. , BUFFER THERMAL
STAGE PROTECTION
HEIGHT
i S- 5180
ABSOLUTE MAXIMUM RATINGS
( Symbol Parameter Value Unit
Vs Supply Voltage at Pin 2 35 V
V7, Ve Flyback Peak Voltage 60 V
V11 Sync. Input Voltage 20 V
V19, V20 Power Amplifier Input Voltage Vs V
! V1 Voltage at Pin 1 Vs
lo Output Current (non repetitive) at t = 2 msec 2 A
lo Output Peak Current at f = 50 Hz t > 10 psec 1.2 A
I Io Output Peak Current at f = 50 Hz t s 10 psec 2.2 A
i I3 Pin 3 Peak to Peak Flyback Current at f = 50 Hz, my s 1.5 msec 2 A
i I3 Pin 3 DC Current at V7 < V2 50 mA
Ptot Maximum Power Dissipation : at Tpins s 90 °C 4.3 W
at Tamb = 70 "C 1 W
Tsta, Ts Storage and Junction Temperature - 40 to 150 °C
THERMAL DATA
Rm wins Thermal Resistance Junction-pins Max 14 "C/W
Rm j-amb Thermal Resistance Junction-ambient Max 80 °C/W
2/13 Clh7 scs-momson
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