TDA8944J
2 x 7 W stereo BTL audio amplifier
Philips Semiconductors
18. Revision history
Table 11: Revision history
Rev Date
CPCN
-
Description
02 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
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Figure 1 on page 2: Block diagram; pin numbers changed OUT2− → 14 and OUT2+ → 17
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Figure 2 on page 3: Pin configuration; pin numbers changed OUT2− → 14 and OUT2+ → 17
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Section 8 “Functional description”:
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– 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”:
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– 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
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Section 8.5 “Built-in protection circuits” on page 6 → added
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Table 5 on page 7:
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– Ptot value added 18 V
– VCC(sc) value added 15 V
Table 6 on page 7:
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– 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: V
Table 8 on page 8:
- mute mode - value Min 2.5 → changed to 3 V
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•
MODE
– SVRR; Typ values 65 and 60 dB → added
– αcs; Typ value 75 dB → added
Figure 3 to 13: figures added
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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
01 990414
-
Preliminary specification; initial version.
9397 750 06861
© Philips Electronics N.V. 2000. All rights reserved.
Product specification
Rev. 02 — 14 February 2000
18 of 21
NXP [ NXP ]
