TDA4861 Ver la hoja de datos (PDF) - Philips Electronics

Número de pieza

componentes Descripción

Fabricante

TDA4861

Vertical deflection power amplifier for monitors

Philips Electronics 

Philips Semiconductors

Vertical deflection power amplifier for

monitors

BLOCK DIAGRAM

Product specification

TDA4861

handbook, full pagewidth

VOLTAGE

STABILIZER

VERTICAL

DRIVER

TDA4861

THERMAL AND

SOAR

PROTECTION

FLYBACK

DRIVER

DIFFERENTIAL

INPUT

AMPLIFIER

VERTICAL

OUTPUT

FLYBACK

GENERATOR

PULSE

CIRCUIT

+8.8 V

150 kΩ

1

2

VP1

470

µF

from TDA4850

1 MΩ

V-shift

3

BAX13

4

5

VP2 V-OUT

6

SUB

270 Ω

1.8 kΩ

1.8 kΩ

R1

1Ω

5.6 Ω

0.1 µF

yoke

470 µF

VN

−8.1 V

7

8

9

FLB

VP3

PCO

470 µF

4.3 Ω

10 kΩ RPCO

+52 V

MHA612

Assumed values:

Iyoke = 1.42 A.

Ryoke = 4.17 Ω + 7% + ∆R(T) = 6.12 Ω.

Lyoke = 5.25 mH.

R1 = 1.0 Ω ±1%.

Tamb = 65 °C.

Tj(max) = 105 °C.

Tyoke = 75 °C.

Pyoke = 1.2 W.

PIC = 1.8 W.

Ptot = 3.0 W.

tpFLB = typically 250 µs.

Attention: the heatsink of the IC must be isolated against ground (it is connected to pin 6).

Fig.1 Block diagram and application circuit with flyback supply voltage VP3 from an external source.

Deflection frequency range from 50 to 100 Hz.

1997 Jan 20

3

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