TDA8922CJ View Datasheet(PDF) - NXP Semiconductors.

Part Name

Description

Manufacturer

TDA8922CJ

2×75 W class-D power amplifier

NXP Semiconductors. 

NXP Semiconductors

TDA8922C

2 × 75 W class-D power amplifier

Equation 5 defines the relationship between maximum power dissipation before activation

of TFB and total thermal resistance from junction to ambient.

(5)

Rth(j–a) = -T----j---–---P-T----a---m----b

Power dissipation (P) is determined by the efficiency of the TDA8922C. Efficiency

measured as a function of output power is given in Figure 20. Power dissipation can be

derived as a function of output power as shown in Figure 19.

30

P

(W)

(1)

20

mbl469

(2)

10

(3)

(4)

(5)

0

0

20

40

60

80

100

Tamb (°C)

(1) Rth(j-a) = 5 K/W.

(2) Rth(j-a) = 10 K/W.

(3) Rth(j-a) = 15 K/W.

(4) Rth(j-a) = 20 K/W.

(5) Rth(j-a) = 35 K/W.

Fig 9. Derating curves for power dissipation as a function of maximum ambient

temperature

TDA8922C_1

Product data sheet

Rev. 01 — 7 September 2009

© NXP B.V. 2009. All rights reserved.

19 of 40

Share Link: