TDA4863 datasheet(13/20 Pages) PHILIPS

13 / 20 page

2000 Aug 17

Philips Semiconductors

Product speciﬁcation

Vertical deﬂection booster

TDA4863J; TDA4863AJ

Example for both TDA4863J and TDA4863AJ

Table 1

Values given from application

Note

1. For TDA4863J only.

Table 2

Calculated values

VP1,VN and VFB are referenced to ground of application;

voltages are calculated with +10% tolerances.

Calculation formulae for supply voltages:

VP1 = −V5-3 +(R1+Rdeflcoil) × Idefl(max) − U’L +UD1

VN =V5-4 +(R1+Rdeflcoil) × Idefl(max) +U’L

where

U’L =Ldeflcoil × 2Idefl(max) × fv

fv = vertical deflection frequency

UD1 = forward voltage drop across D1.

Calculation formulae for power consumption:

where

PIC = power dissipation of the IC

Ptot = total power dissipation

Pdefl = power dissipation of the deflection coil.

Calculation formulae for maximum required thermal

resistance for the heatsink at Tj(max) = 110 °C:

Table 3

tﬂb as a function of VFB for TDA4863J

Table 4

tﬂb as a function of VP1 and VN for TDA4863AJ

SYMBOL

VALUE

UNIT

Ideﬂ(max)

0.71

Ldeﬂcoil

6mH

Rdeﬂcoil

Ω

270

Ω

1.8

Ω

1.8

Ω

VFB(1)

Tamb

°C

Tdeﬂcoil

°C

Rth(j-mb)

K/W

Rth(mb-amb)

K/W

SYMBOL

VALUE

UNIT

TDA4863J

TDA4863AJ

VP1

12.5

−8

−12.5

Ptot

3.2

4.4

Pdeﬂ

1.2

PIC

3.2

Rth(tot)

K/W

Tj(max)

105

°C

tﬂb (µs)

VFB (V)

350

250

210

tﬂb (µs)

VP1 (V)

VN (V)

PIC (W)

R6 (

Ω)

360

−10

2.5

290

12.5

−12.5

3.2

3.9

240

−15

3.9

6.8

tot

defl

–

tot

–

()

defl(max)

--------------------

defl(max)

--------------------

–

() 0.01 A 0.2 W

defl

deflcoil

--------------------------------

defl(max)

th(mb-amb)

j(max)

amb

–

-----------------------------------



 R

th(j-mb)

–

19 K/W (max.)

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