AN-1192 Datasheet, PDF (1/21 Pages) National Semiconductor (TI) – broad portfolio of monolithic power integrated circuits covering power levels

Overture^™ Series High
Power Solutions
National Semiconductor
Application Note 1192
John DeCelles and Troy Huebner
June 2004
Table of Contents
1.0 Introduction ............................................................................................................................................. 2
2.0 Objective ................................................................................................................................................. 2
3.0 Conclusion .............................................................................................................................................. 2
4.0 Thermal Background .............................................................................................................................. 2
4.1 TYPICAL CHARACTERISTIC DATA ................................................................................................... 3
4.2 SINGLE-ENDED AMPLIFIER Pdmax EQUATION: ............................................................................. 3
4.3 BRIDGED-OUTPUT AMPLIFIER Pdmax EQUATION ......................................................................... 3
4.4 PARALLEL AMPLIFIER Pdmax EQUATION ....................................................................................... 4
4.5 BRIDGED/PARALLEL AMPLIFIER Pdmax EQUATION ...................................................................... 4
4.6 THERMAL CONCLUSION ................................................................................................................... 4
4.7 THERMAL TESTING CONDITIONS .................................................................................................... 5
5.0 BR100 — 100W Bridge Circuit ................................................................................................................ 5
5.1 AUDIO TESTING ................................................................................................................................. 5
5.1.1 Linearity Tests ................................................................................................................................ 5
5.2 SCHEMATICS ...................................................................................................................................... 6
5.2.1 Bridged Amplifier Schematic .......................................................................................................... 6
5.2.2 Electrical Design Notes .................................................................................................................. 6
6.0 PA100 — 100W Parallel Circuit ............................................................................................................... 7
6.1 AUDIO TESTING ................................................................................................................................. 7
6.1.1 Linearity Test .................................................................................................................................. 7
6.2 SCHEMATICS ...................................................................................................................................... 8
6.2.1 Parallel Amplifier Schematic ........................................................................................................... 8
6.2.2 Electrical Design Notes .................................................................................................................. 8
7.0 BPA200–200W Bridged/Parallel Circuit ................................................................................................. 9
7.1 AUDIO TESTING ................................................................................................................................. 9
7.1.1 Linearity Tests ................................................................................................................................ 9
7.1.2 Output Power Tests ........................................................................................................................ 9
7.1.3 Noise Floor Tests ......................................................................................................................... 10
7.1.4 Electrical Design Notes ................................................................................................................ 11
7.2 SCHEMATICS .................................................................................................................................... 12
7.2.1 Detailed Bridged/Parallel Amplifier Schematic ............................................................................. 12
7.2.2 Servo Circuits ............................................................................................................................... 13
7.2.3 Power Supply Circuit .................................................................................................................... 14
7.2.4 Basic Bridged/Parallel Amplifier Schematic ................................................................................. 15
8.0 Parts List and Vendors ......................................................................................................................... 16
8.1 BUILD OF MATERIALS FOR BR100 AMPLIFIER ............................................................................ 16
8.2 BUILD OF MATERIALS FOR PA100 AMPLIFIER ............................................................................. 16
8.3 BUILD OF MATERIALS FOR BPA200 AMPLIFIER .......................................................................... 18
9.0 Heat Sink Drawings .............................................................................................................................. 19
9.1 BR100 AND PA100 HEAT SINK DRAWING ..................................................................................... 19
9.2 BPA200 HEAT SINK DRAWING ........................................................................................................ 20
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