TDA8143 데이터 시트보기 (PDF) - STMicroelectronics

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TDA8143

HORIZONTAL DEFLECTION POWER DRIVER

STMicroelectronics 

Figure 6 : Block Diagram of the Integrated Horizontal Driver

PROTECTION

AND REMOTE 9

STANDBY INPUT

V OLTA GE

CONTROL

VC < 7V

&

OV E RTE M P .

P R OTE CTI ON

Tj < 150˚C

Q9

V1

V2

INPUT

TRANSCONDUCTANCE

R1

R2

AMPLIFIER

Q10

R5

Q11

TDA8143

3

V

+

CC

CONTROL

INPUT

8

SPECIAL

REMOTE 7

STANDBY

I2

&

Q5

Q3

Q4

R3

I1 Q6

D1

Q2

Q1

Q7

D2

R4

R6

VREF = 750mV

V IN

Q8

IB

2

OUTPUT

4

SENSE

INPUT

6

C EXT

CT

1

POWER

GROUND

5

SENSE

GROUND

In Figure 7 is shown the application diagram of the

TDA8143, the few external component and the

automatic handling possibility ensures a lower ap-

plication cost versus the conventional approach

shown in Figure 3.

In Figure 8 is shown the currents and voltage

waveforms of the driver circuit of Figure 7 as to be

seen, the driving charge Ib ⋅ ton has been reduced

at minimum.

The power dissipation on this application condition

is about 1.3W.

The presence of thermal shut-down circuit means

that the heatsink can have a smaller factor of safety

compared with that of a conventional circuit.

If for any reason, the junction temperature in-

creases up to 150oC, the thermal shut-down simply

switches off the device.

7/9

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