參數(shù)資料
型號(hào)： TDA8932TW
廠商： NXP SEMICONDUCTORS
元件分類(lèi)： 音頻／視頻放大
英文描述： 25 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO32
封裝： 6.10 MM, 0.65 MM PITCH, PLASTIC, MO-153, SOT549-1, HTSSOP-32
文件頁(yè)數(shù)： 18/45頁(yè)
文件大?。?/td> 285K
代理商： TDA8932TW
TDA8932_1
Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Preliminary data sheet
Rev. 01 — 11 May 2006
25 of 45
Philips Semiconductors
TDA8932
Class-D audio amplier
14.2 Output current limiting
The peak output current IO(max) is internally limited above a level of 4 A (minimum). During
normal operation the output current should not exceed this threshold level of 4 A
otherwise the output signal is distorted. The peak output current in SE or BTL
congurations can be estimated using Equation 5 and Equation 6.
SE conguration:
(5)
BTL conguration:
(6)
Where:
VP = supply voltage VDDP1 VSSP1 [V] or VDDP2 VSSP2 [V]
RL = load impedance []
RDSon = on-resistance power switch []
Rs = series resistance output inductor []
RESR = equivalent series resistance SE capacitor []
Example:
A4
speaker in the BTL conguration can be used until a supply voltage of 18 V without
running into current limiting. Current limiting (clipping) will avoid audio holes but it causes
a comparable distortion like voltage clipping.
14.3 Speaker conguration and impedance
For a at frequency response (second-order Butterworth lter) it is necessary to change
the low-pass lter components LLC and CLC according to the speaker conguration and
impedance. Table 14 shows the practical required values.
14.4 Single-ended capacitor
The SE capacitor is forming a high-pass lter with the speaker impedance. So the
frequency response will roll-off with 20 dB per decade below f-3dB (3 dB cut-off frequency).
I
O max
()
0.5
V
P
×
R
L
R
DSon
R
s
R
ESR
++
+
----------------------------------------------------------
4A
≤≤
I
O max
()
V
P
R
L
2
+
R
DSon
R
s
+
()
×
------------------------------------------------------
4A
≤≤
Table 14.
Filter component values
Conguration
RL ()
LLC (H)
CLC (nF)
SE
4
22
680
6
33
470
8
47
330
BTL
4
10
1500
6
15
1000
8
22
680
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TDA8933BTW/N2,112 功能描述:音頻放大器 Class D audio amplifier 32 leads RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
TDA8933BTW/N2,118 功能描述:音頻放大器 Class D audio amplifier 32 leads RoHS:否 制造商:STMicroelectronics 產(chǎn)品:General Purpose Audio Amplifiers 輸出類(lèi)型:Digital 輸出功率: THD + 噪聲: 工作電源電壓:3.3 V 電源電流: 最大功率耗散: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:TQFP-64 封裝:Reel
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