AN10436 PHILIPS [NXP Semiconductors], AN10436 Datasheet - Page 7

• Manufacturer Part Number: AN10436
• Description: TDA8932B/33(B) Class-D audio amplifier
• Manufacturer: PHILIPS [NXP Semiconductors]

NXP Semiconductors
AN10436_1
Application note
Fig 4. Simplified SE application TDA8932B/33(B) (symmetrical supply)
(1) The TDA8933T device requires a 1 MΩ resistor in parallel with the bootstrap capacitor Cbo. TDA8932BT, TDA8932BTW
and TDA8933BTW devices do not require a 1 MΩ resistor.
SLEEP control
MUTE control
1.3.3 Asymmetrical supply mono BTL configuration
VSSA
GND
VDD
VSS
+
+
A symmetrical supply has some benefits compared to an asymmetrical supply. First, the
power bandwidth is not limited by the size of the SE capacitor. Therefore, for a full
bandwidth (20 Hz to 20 kHz) amplifier, a symmetrical supply should be considered to
avoid a large value SE capacitor. Secondly, when the supply is either unregulated and/or
weak (e.g., a 50 Hz / 60 Hz transformer), the output signal will not suffer from
asymmetrical clipping (see
The TDA8932B/33(B) can operate in BTL configuration when a high output power is
required at a low supply voltage (e.g., for driving a subwoofer in a 2.1 system). See
Figure
470 nF
Cin
470 nF
100 nF
Rvdda
Rvssa
39 k
Cosc
Rosc
10
10
Cin
470 nF
5.
Cen
470 nF
Cin
Cinref
100 nF
470 nF
Cin
VSSA
VSSA
Cvdda
100 nF
Cvssa
100 nF
VDDA
VSSA
VSSA
POWERUP
V
V
ENGAGE
OSCREF
HVPREF
SSD(HW)
SSD(HW)
VDDA
VSSA
CGND
INREF
TEST
DIAG
V
V
IN1P
IN1N
IN2N
IN2P
DDA
SSA
Rev. 01 — 12 December 2007
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Cvddp
220 F
(25 V)
Cvssp
220 F
(25 V)
Section
TDA8932B/
VDD
VSS
33(B)
U1
4.4).
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
V
OSCIO
HVP1
V
BOOT1
OUT1
V
STAB1
STAB2
V
OUT2
BOOT2
V
HVP2
DREF
V
SSD(HW)
DDP1
SSP1
SSP2
DDP2
SSD(HW)
TDA8932B/33(B) Class-D audio amplifier
VSS
Cbo
15 nF
Cbo
15 nF
Cdref
100 nF
Cstab
100 nF
(1)
(1)
VSSA
VSS
VSSA
Cvddp
100 nF
Cvddp
100 nF
VDD
VDD
VSS
VSS
Cvssp
100 nF
Csn
470 pF
Rsn
10
Rsn
10
Csn
470 pF
Cvssp
100 nF
Llc
Llc
AN10436
© NXP B.V. 2007. All rights reserved.
010aaa419
Clc
Clc
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