1997 Aug 27

11

Philips Semiconductors

Preliminary specification

Video output amplifier

TDA6120Q

TEST AND APPLICATION INFORMATION

Dissipation

Regarding dissipation, distinction must be made between

static dissipation (independent of frequency) and dynamic

dissipation (proportional to frequency). The static

dissipation of the TDA6120Q is due to supply currents, and

currents in the feedback network and CRT.

The static dissipation is given by the following equation:

Where:

The dynamic dissipation is given by the following equation:

P

stat

V

CC

I

CC

V

DD

I

DD

V

OUTC

V

OUTC

R

f

I

OUTC

–

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

×

–

×

+

×

=

P

dyn

V

DD

C

L

C

int

+

() f

×

V

OUTC p

p

–

()

×

b

×

×

=

Where:

(approximately 7 pF)

f = frequency

b = non-blanking duty cycle (0.8).

The IC must be mounted on the picture tube base

Switch-off

The voltage at output pins OUT and OUTC will be pulled

switched off.