TDA8948J datasheet(6/26 Pages) NXP

部品番号	TDA8948J

部品情報	4-channel audio amplifier

Download	26 Pages

Scroll/Zoom	100%

メーカー	NXP [NXP Semiconductors]

ホームページ	http://www.nxp.com

Logo

6 / 26 page

TDA8948J_1

Product data sheet

Rev. 01 — 27 February 2008

6 of 26

NXP Semiconductors

TDA8948J

4-channel audio ampliﬁer

8.2.1 Output power measurement

The output power as a function of the supply voltage is measured on the output pins at

THD = 10 %; see Figure 7.

The maximum output power is limited by the supply voltage (VCC = 26 V) and the

maximum output current (IO = 4 A repetitive peak current).

For supply voltages VCC > 22 V, a minimum load is required; see Figure 5:

• SE: RL =3 Ω

• BTL: RL =6 Ω

8.2.2 Headroom

Typical CD music requires at least 12 dB (factor 15.85) dynamic headroom, compared to

the average power output, for transferring the loudest parts without distortion.

The Average Listening Level (ALL) music power, without any distortion, yields:

• SE at Po(SE) =5W, VCC =17V, RL =4 Ω and THD = 0.2 %:

(4)

• BTL at Po(BTL) =10W, VCC =17V, RL =8 Ω and THD = 0.1 %:

(5)

The power dissipation can be derived from Figure 8 (SE and BTL) for a headroom of 0 dB

and 12 dB, respectively.

For heat sink calculation at the average listening level, a power dissipation of 9 W can be

used.

8.3 Mode selection

The TDA8948J has three functional modes which can be selected by applying the proper

DC voltage to pin MODE1.

Standby - The current consumption is very low and the outputs are ﬂoating. The device is

in standby mode when VMODE1 < 0.8 V, or when the MODE1 pin is grounded. In standby

mode, the function of pin MODE2 has been disabled.

Mute - The ampliﬁer is DC-biased, but not operational (no audio output). This allows the

input coupling capacitors to be charged to avoid pop-noise. The device is in mute mode

when 4.5V<VMODE1 <(VCC - 3.5 V).

Table 4.

Power rating as function of headroom

Headroom

Power output

Power dissipation

(all channels driven)

SE

BTL

0dB

Po =5W

Po =10W

P=17 W

12 dB

Po(ALL) = 315 mW

Po(ALL) = 630 mW

P = 9 W

P

oALL

()SE

510

3

⋅

15.85

---------------

315 mW

==

P

oALL

()BTL

10 10

3

⋅

15.85

------------------

630 mW

==

同様の部品番号 - TDA8948J

メーカー	部品番号	データシート	部品情報
NXP Semiconductors	TDA8941	370Kb / 21P	1.5 W mono Bridge Tied Load BTL audio amplifier Rev. 02 -7 April 2000
	TDA8941P	370Kb / 21P	1.5 W mono Bridge Tied Load BTL audio amplifier Rev. 02 -7 April 2000
	TDA8942	395Kb / 23P	2 x 1.5 W stereo Bridge Tied Load BTL audio amplifier Rev. 02 -14 March 2000
	TDA8942P	395Kb / 23P	2 x 1.5 W stereo Bridge Tied Load BTL audio amplifier Rev. 02 -14 March 2000
	TDA8943	358Kb / 20P	6 W mono Bridge Tied Load BTL audio amplifier Rev. 02 -7 April 2000

More results

同様の説明 - TDA8948J

メーカー	部品番号	データシート	部品情報
NXP Semiconductors	TFA9841J	121Kb / 17P	1-channel audio amplifier Rev. 01-06 February 2004
List of Unclassifed Man...	CS8563S	1Mb / 12P	2-Channel Audio Amplifier
Silan Microelectronics ...	SD7401	491Kb / 7P	SIX-CHANNEL AUDIO AMPLIFIER
Sanyo Semicon Device	LV47011P	267Kb / 10P	For Car Audio Systems 4-Channel BTL Power Amplifier
Sanyo Semicon Device	LV47004P	308Kb / 11P	For Car Audio Systems 4-Channel BTL Power Amplifier
International Rectifier	IRAUDAMP8	944Kb / 34P	120W x 4 Channel Class D Audio Power Amplifier
Sanyo Semicon Device	LV47004P	290Kb / 11P	For Car Audio Systems 4-Channel BTL Power Amplifier
	LV47009P	283Kb / 11P	For Car Audio Systems 4-Channel BTL Power Amplifier
	LV47009P	301Kb / 11P	For Car Audio Systems 4-Channel BTL Power Amplifier
ON Semiconductor	LV47022P	284Kb / 12P	4-Channel BTL Power Amplifier for Car Audio Systems May, 2013