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TDA8944J Datasheet, PDF (18/21 Pages) NXP Semiconductors – 2 x 7 W stereo Bridge Tied Load BTL audio amplifier | |||
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Philips Semiconductors
TDA8944J
2 x 7 W stereo BTL audio ampliï¬er
18. Revision history
Table 11: Revision history
Rev Date CPCN
Description
02 000214 -
Product speciï¬cation; second version; supersedes initial version TDA8944J-01 of
14 April 1999 (9397 750 04881). Modiï¬cations:
⢠Table 1 on page 1: SVRR; Typ value 65 dB â added
⢠Figure 1 on page 2: Block diagram; pin numbers changed OUT2â â 14 and OUT2+ â 17
⢠Figure 2 on page 3: Pin conï¬guration; pin numbers changed OUT2â â 14 and OUT2+ â 17
⢠Section 8 âFunctional descriptionâ:
â Section 8.1 âInput conï¬gurationâ on page 4 â added.
â Section 8.2 âPower ampliï¬erâ on page 5: ........, capable of delivering a peak output
current of 1.5 A â changed to 2 A.
â Section 8.2.1 âOutput power measurementâ on page 5 â added
â Section 8.2.2 âHeadroomâ on page 5 â added
⢠Section 8.3 âMode selectionâ:
â Standby mode: VMODE > (VCC â 0.5 V) â changed to (VCC â 0.5 V) < VMODE < VCC; The
power consumption of the TDA8944J will be reduced to <0.18 mW â added.
â Mute mode: the DC level of the input and output pins remain on half the supply
voltage â added;
â 2.5 V < VMODE < (VCC â 1.5 V) â changed to 3 V < VMODE < (VCC â 1.5 V)
â Section 8.3.1 âSwitch-on and switch-offâ on page 6
⢠Section 8.4 âSupply Voltage Ripple Rejection (SVRR)â on page 6 â added
⢠Section 8.5 âBuilt-in protection circuitsâ on page 6 â added
⢠Table 5 on page 7:
â Ptot value added 18 V
â VCC(sc) value added 15 V
⢠Table 6 on page 7:
â Rth(j-a) value added 40 K/W
â Rth(j-c) value 10 â changed to 6.9 K/W; condition âin free airâ â changed to âboth channels
drivenâ
⢠Table 7 on page 7: VMODE - mute mode - value Min 2.5 â changed to 3 V
⢠Table 8 on page 8:
â SVRR; Typ values 65 and 60 dB â added
â αcs; Typ value 75 dB â added
⢠Figure 3 to 13: ï¬gures added
⢠Section 13 âInternal circuitryâ on page 12: â added
⢠Figure 14: ï¬gure adjusted
⢠Section 14.1 âPrinted-circuit board (PCB)â on page 13: â added
⢠Figure 15: ï¬gure added
⢠Section 14.2 âThermal behaviour and heatsink calculationâ on page 15: â added
⢠Section 15.2 âTest conditionsâ on page 15: â added
01 990414 -
Preliminary speciï¬cation; initial version.
9397 750 06861
Product speciï¬cation
Rev. 02 â 14 February 2000
© Philips Electronics N.V. 2000. All rights reserved.
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