TDA8944J datasheet(18/21 Pages) PHILIPS

18 / 21 page

Philips Semiconductors

TDA8944J

2 x 7 W stereo BTL audio ampliﬁer

Product speciﬁcation

Rev. 02 — 14 February 2000

18 of 21

9397 750 06861

18. Revision history

Table 11: Revision history

Rev Date

CPCN

Description

000214

Product speciﬁcation; second version; supersedes initial version TDA8944J-01 of

14 April 1999 (9397 750 04881). Modiﬁcations:

• Table 1 on page 1: SVRR; Typ value 65 dB → added

• Figure 1 on page 2: Block diagram; pin numbers changed OUT2−→ 14 and OUT2+ → 17

• Figure 2 on page 3: Pin conﬁguration; pin numbers changed OUT2−→ 14 and OUT2+ → 17

• Section 8 “Functional description”:

– Section 8.1 “Input conﬁguration” on page 4

→ added.

– Section 8.2 “Power ampliﬁer” on page 5: ........, capable of delivering a peak output

current of 1.5 A

→ changed to 2 A.

– Section 8.2.1 “Output power measurement” on page 5

→ added

– Section 8.2.2 “Headroom” on page 5

→ added

• Section 8.3 “Mode selection”:

– Standby mode: VMODE >(VCC − 0.5 V) → changed to (VCC − 0.5 V) < VMODE <VCC; The

power consumption of the TDA8944J will be reduced to <0.18 mW

→ added.

– Mute mode: the DC level of the input and output pins remain on half the supply

voltage

→ added;

– 2.5 V < VMODE <(VCC − 1.5 V) → changed to 3 V < VMODE <(VCC − 1.5 V)

– Section 8.3.1 “Switch-on and switch-off” on page 6

• Section 8.4 “Supply Voltage Ripple Rejection (SVRR)” on page 6 → added

• Section 8.5 “Built-in protection circuits” on page 6 → added

• Table 5 on page 7:

– Ptot value added 18 V

– VCC(sc) value added 15 V

• Table 6 on page 7:

– Rth(j-a) value added 40 K/W

– Rth(j-c) value 10 → changed to 6.9 K/W; condition ‘in free air’ → changed to ‘both channels

driven’

• Table 7 on page 7: VMODE - mute mode - value Min 2.5 → changed to 3 V

• Table 8 on page 8:

– SVRR; Typ values 65 and 60 dB

→ added

–

cs; Typ value 75 dB → added

• Figure 3 to 13: ﬁgures added

• Section 13 “Internal circuitry” on page 12: → added

• Figure 14: ﬁgure adjusted

• Section 14.1 “Printed-circuit board (PCB)” on page 13: → added

• Figure 15: ﬁgure added

• Section 14.2 “Thermal behaviour and heatsink calculation” on page 15: → added

• Section 15.2 “Test conditions” on page 15: → added

990414

Preliminary speciﬁcation; initial version.

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