Table of Contents
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Philips Semiconductors
10. Contents
1.
Introduction....................................................... 3
1.1
Amplifier description.......................................... 3
1.2
The Class H principle........................................ 3
1.3
Block diagram................................................... 6
1.4
Pinning............................................................. 7
1.5
Quick reference data......................................... 8
2.
Features and Diagnostics ................................. 9
2.1
The Mode select pin.......................................... 9
2.2
The Status I/O pin............................................. 9
2.3
The diagnostic pin........................................... 10
2.4
Differential inputs............................................ 14
3.
Switch on/off behavior.................................... 14
4.
Protections and overstress conditions .......... 16
5.
Application description................................... 18
5.1
Application schematic ..................................... 18
5.2
Dimensioning of the Class H application.......... 23
5.3
Minimum load impedance ............................... 28
5.4
Recommendations.......................................... 28
5.5
Used components........................................... 29
5.6
PCB lay out .................................................... 30
5.7
Thermal behavior............................................ 32
5.7.1
Power dissipation............................................ 32
5.7.2
Power dissipation curves................................. 33
5.7.3
Heatsink calculation ........................................ 35
6.
Typical waveforms.......................................... 37
7.
Measurement curves....................................... 45
8.
Driving a dual voice coil speaker.................... 49
8.1
8.2
Positive voltage pulses at the outputs.............. 52
8.3
Protection circuits ........................................... 55
8.3.1
Hard limiter..................................................... 55
8.3.2
OVP circuit ..................................................... 57
8.4
inductance..................................................................... 57
9.
Conclusion ...................................................... 60
10.
Contents.......................................................... 61
<12NC>
Application note
Rev. 01.02 - 05 May 2006
AN<nnnnn>
TDA1562 application note
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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