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Thermal characteristics, 1 thermal protection, Tda6107ajf – Philips TDA6107AJF User Manual

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© Koninklijke Philips Electronics N.V. 2005. All rights reserved.

Product data sheet

Rev. 02 — 28 April 2005

5 of 16

Philips Semiconductors

TDA6107AJF

Triple video output amplifier

8.

Thermal characteristics

[1]

An external heatsink is necessary; see

Application Note AN10227-01

.

8.1 Thermal protection

The internal thermal protection circuit gives a decrease of the slew rate at high
temperatures: 10 % decrease at 130

°

C and 30 % decrease at 145

°

C (typical values on

the spot of the thermal protection circuit).

Table 4:

Thermal characteristics

Symbol

Parameter

Conditions

Typ

Unit

R

th(j-a)

thermal resistance from junction to ambient in free air

56

K/W

R

th(j-fin)

thermal resistance from junction to fin

[1]

11

K/W

(1) Infinite heatsink.

(2) No heatsink.

Fig 4.

Power derating curves

P

tot

(W)

8

6

2

0

4

40

0

40

80

160

120

T

amb

(

°

C)

mbh989

(1)

(2)

Fig 5.

Equivalent thermal resistance network

mgk279

5 K/W

outputs

fin

thermal protection circuit

6 K/W