TDA8932 NXP Semiconductors, TDA8932 Datasheet - Page 25

• Manufacturer Part Number: TDA8932
• Manufacturer: NXP Semiconductors

Specifications of TDA8932

• Operational Class: Class-D
• Output Power (typ): 50x1@8Ohm/25x2@4OhmW
• Audio Amplifier Function: Speaker
• Total Harmonic Distortion: 0.015@4Ohm@1W%
• Single Supply Voltage (typ): 22V
• Dual Supply Voltage (typ): ±11V
• Power Supply Requirement: Single/Dual
• Power Dissipation: 5W
• Rail/rail I/o Type: No
• Single Supply Voltage (min): 10V
• Single Supply Voltage (max): 36V
• Dual Supply Voltage (min): ±5V
• Dual Supply Voltage (max): ±18V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 32
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Philips Semiconductors
TDA8932_1
Preliminary data sheet
14.2 Output current limiting
14.3 Speaker configuration and impedance
14.4 Single-ended capacitor
The peak output current I
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
configurations can be estimated using
SE configuration:
BTL configuration:
Where:
Example:
A 4
running into current limiting. Current limiting (clipping) will avoid audio holes but it causes
a comparable distortion like voltage clipping.
For a flat frequency response (second-order Butterworth filter) it is necessary to change
the low-pass filter components L
impedance.
Table 14.
The SE capacitor is forming a high-pass filter with the speaker impedance. So the
frequency response will roll-off with 20 dB per decade below f
I
I
Configuration
SE
BTL
O max
O max
V
R
R
R
R
P
L
DSon
s
ESR
= series resistance output inductor [ ]
= supply voltage V
= load impedance [ ]
speaker in the BTL configuration can be used until a supply voltage of 18 V without
= equivalent series resistance SE capacitor [ ]
= on-resistance power switch [ ]
----------------------------------------------------------
R
----------------------------------------------------- -
R
Filter component values
L
L
Table 14
+
+
R
2
DSon
0.5 V
V
R
P
DSon
+
shows the practical required values.
R
R
4
6
8
4
6
8
P
Rev. 01 — 11 May 2006
DDP1
s
L
O(max)
+
+
( )
R
R
s
ESR
V
is internally limited above a level of 4 A (minimum). During
4 A
SSP1
LC
4 A
and C
[V] or V
Equation 5
LC
according to the speaker configuration and
DDP2
L
22
33
47
10
15
22
LC
( H)
and
V
SSP2
Equation
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
[V]
-3dB
6.
Class-D audio amplifier
(3 dB cut-off frequency).
C
680
470
330
1500
1000
680
LC
TDA8932
(nF)
25 of 45
(5)
(6)