900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf






KODENSHI KOREA

KKA8356 Datasheet Preview

KKA8356 Datasheet

DC-coupled vertical deflection circuit

No Preview Available !

www.DataSheet4U.com
TECHNICAL DATA
DC-coupled vertical deflection circuit
The KKA8356 is a power circuit for use in 90o and 110ocolour deflection systems for field frequencies
of 50 to 120 Hz. The circuit provides a DC driven vertical deflection output circuit, operating as a
highly efficient class G system.
FEATURES
Few external components
Highly efficient fully DC-coupled vertical output bridge circuit
Vertical flyback switch
Guard circuit
Protection against:
– short-circuit of the output pins (7 and 4)
– short-circuit of the output pins to VP
Temperature (thermal) protection
High EMC immunity because of common mode inputs
A guard signal in zoom mode
PINNING
SYMBOL
Idrive(pos)
Idrive(neg)
VP
VO(B)
GND
VFB
VO(A)
VO(guard)
VI(fb)
PIN DESCRIPTION
1 input power-stage (positive); includes II(sb) signal bias
2 input power-stage (negative);includes II(sb) signal bias
3 operating supply voltage
4 output voltage B
5 ground
6 input flyback supply voltage
7 output voltage A
8 guard output voltage
9 input feedback voltage
BLOCK DIAGRAM
1




KODENSHI KOREA

KKA8356 Datasheet Preview

KKA8356 Datasheet

DC-coupled vertical deflection circuit

No Preview Available !

www.DataSheet4U.com
KKA8356
QUICK REFERENCE DATA
3
SYMBOL
PARAMETER
DC supply
VP supply voltage
Iq quiescent supply current
Vertical circuit
IO(p-p) output current
(peak-to-peak value)
Idiff(p-p) differential input current (peak-to-peak value)
Vdiff(p-p) differential input voltage (peak-to-peak value)
Flyback switch
IM peak output current
VFB flyback supply voltage
Thermal data
Tstg storage temperature
Tamb operating ambient temperature
Tvj virtual junction temperature
MIN.
9
55
25
TYP.
4.5
30
600
1.5
MAX.
UNIT
25 V
mA
2A
µA
1.8 V
+1 A
50 V
+150
+75
150
oC
oC
oC
FUNCTIONAL DESCRIPTION
The vertical driver circuit is a bridge configuration. The deflection coil is connected between the output
amplifiers, which are driven in phase opposition. An external resistor (RM) connected in series with the
deflection coil provides internal feedback information. The differential input circuit is voltage driven. An
external resistor (RCON) connected between the differential input determines the output current
through the deflection coil. The relationship between the differential input current and
the output current is defined by: Idiff xRCON = Icoil xRM.The output current is adjustable from 0.5 A (p-p)
to 2 A (p-p) by varying RM. The maximum input differential voltage is 1.8 V. In the application it is
recommended that Vdiff = 1.5 V (typ). This is recommended because of the spread of input current and
the spread in the value of RCON. The flyback voltage is determined by an additional supply voltage VFB.
The principle of operating with two supply voltages (class G) makes it possible to fix the supply
voltage VP optimum for the scan voltage and the second supply voltage VFB optimum for the flyback
voltage. Using this method, very high efficiency is achieved.
The supply voltage VFB is almost totally available as flyback voltage across the coil, this being
possible due to the absence of a decoupling capacitor (not necessary, due to the bridge configuration).
The output circuit is fully protected against the following:
thermal protection
short-circuit protection of the output pins (pins 4 and 7)
short-circuit of the output pins to VP.
A guard circuit VO(guard) is provided. The guard circuit is activated at the following conditions:
during flyback
during short-circuit of the coil and during short-circuit of the output pins (pins 4 and 7) to VP or
ground
during open loop
when the thermal protection is activated.
This signal can be used for blanking the picture tube screen.
2


Part Number KKA8356
Description DC-coupled vertical deflection circuit
Maker KODENSHI KOREA
PDF Download

KKA8356 Datasheet PDF






Similar Datasheet

1 KKA8351 DC-COUPLED VERTICAL DEFLECTION CIRCUIT
KODENSHI KOREA
2 KKA8356 DC-coupled vertical deflection circuit
KODENSHI KOREA





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy