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UM10155_2

oninklijk

e Philips Electronics N.V

. 2006. All r

ights reser

ed.

User man

ual

Re
v

. 02 — 5 September 2006

4 of 12

Philips Semiconductor

UM10155

Discrete Class D High P

wer A

udio Amplifier

Cir
cuit dia

gram

Fig 2.

Circuit diagram

001aaf149

Ω

C3
100 nF

C1
4.7 nF

C12
100 nF

C11
22

C15
680 nF

C16
100 nF

C17
1000

C13
100 nF

C14
22

C18
100 nF

C19
1000

C6
100 nF

C5
100

C2
100 nF

C9
100 pF

C4
220 pF

560

Ω

47 k

Ω

R29

Ω

R28

R8
220

Ω

R7
220

Ω

R6
47 k

Ω

R11
1 k

Ω

R13
2.2 k

Ω

R12
22 k

Ω

R14
5.6 M

Ω

R15
3.9 M

Ω

R9
330

Ω

R8
1 k

Ω

R18
390

Ω

R24
10

Ω

R26
0.05

Ω

R25
0.05

Ω

R16
4.7 k

Ω

R2
1 k

Ω

R10
220

Ω

1PS76SB10

BF820

BC847

BF820

BF821

Q4
BF721

Q12
PBSS5140T

Q10
BC857

BF821

Q14

D11

BAS316

BAS321

1PS76SB10

D8
PDZ12B

D6
BAS321

R20

Ω

PHP18NQ11T

BC857

BC847

Ω

J10

J11

C8
100 nF

C7
100

C10
100 pF

R21
1 k

Ω

R17
390

Ω

R23
10

Ω

Q11
PBSS5140T

Q9
BC857

Q15

BF720

Q13

D12

BAS316

D10

1PS76SB10

D5
PDZ12B

R19

Ω

R27

8.2 k

Ω

PHP18NQ11T

Содержание UM10155

Страница 1: ... High Power Audio Abstract This user manual describes the operating instructions and the most important background information of the Philips Semiconductor Discrete Class D High Power Audio Amplifier Demonstrator Board With proper heatsinking of the Power MOSFETs and a well dimensioned power supply the PWM amplifier is capable of supplying 200 W of high quality audio power into a 4 Ω loudspeaker ...

Страница 2: ...additional information please visit http www semiconductors philips com For sales office addresses please send an email to sales addresses www semiconductors philips com Philips Semiconductors UM10155 Discrete Class D High Power Audio Amplifier Revision history Rev Date Description 02 20060905 corrected Figure 9 01 20060801 initial version ...

Страница 3: ...ard The amplifier is built up of discrete components only and makes use of Philips patent WO 03 090343 The demonstrator board is intended to illustrate the capability of Philips Power MOSFETs in discrete high end PWM audio amplifier applications The board is self contained and only requires a simple non stabilized dual power supply an audio source e g function generator CD player and a loudspeaker...

Страница 4: ... 2 Circuit diagram 001aaf149 47 Ω C3 100 nF C1 4 7 nF C12 100 nF C11 22 µF C15 680 nF C16 100 nF C17 1000 µF C13 100 nF C14 22 µF C18 100 nF C19 1000 µF C6 100 nF C5 100 µF C2 100 nF C9 100 pF C4 220 pF R3 560 Ω R1 47 kΩ R5 10 Ω R29 10 Ω R28 R8 220 Ω R7 220 Ω R6 47 kΩ R11 1 kΩ R13 2 2 kΩ R12 22 kΩ R14 5 6 MΩ R15 3 9 MΩ R9 330 Ω R8 1 kΩ R18 390 Ω R24 10 Ω R26 0 05 Ω R25 0 05 Ω R16 4 7 kΩ R2 1 kΩ R1...

Страница 5: ... to ground J4 the amplifier is enabled J4 ground use together with J3 J5 positive supply voltage 30 V to 45 V no need for a stabilized power supply J6 positive current sense can optionally be used in an overcurrent protection scheme J7 power supply ground 0 V J8 negative current sense can optionally be used in an overcurrent protection scheme J9 negative supply voltage 30 V to 45 V no need for a s...

Страница 6: ...rent flowing through the Power MOSFETs Q13 and Q14 The voltage appearing between pins J5 and J6 is proportional to the current in MOSFET Q14 ratio 50 mV A and the voltage between J8 and J9 is proportional to the current in MOSFET Q13 ratio 50 mV A With the use of an external Fig 5 Component layout Fig 6 Top silk screen 001aaf152 001aaf153 J3 J4 J5 J6 J10 J11 J8 J9 J7 J1 J2 C5 class D amp version 1...

Страница 7: ...s for short circuit and overcurrent protection were made on the demonstrator board itself Neither was an operating temperature compensation feature implemented on the board The circuit on the board is reduced to its essentials In this implementation the High Power Class D Audio Amplifier Demonstrator Board is not intended to be used for long term operation or under extreme temperature conditions w...

Страница 8: ...hutting down the amplifier in case of a failure condition short circuit overcurrent over temperature The transistor in the enabling disabling circuit must be low current 60 V type such as BC846 and the resistor must limit the base current of the transistor to approximately 1 mA in case of logic level driving that would mean R 4 7 kΩ Enable signal HIGH enable LOW disable Fig 8 Enabling disabling of...

Страница 9: ...olutions would be a latch circuit which on a high pulse forces the output go low This causes the Electronic enabling disabling circuit to disable the amplifier Through manual intervention and or after a certain while the latch should be reset to a HIGH logic level which in turn re enables the amplifier Fig 9 Short circuit and overcurrent protection 001aaf156 J3 J4 J5 J6 J10 J11 J8 J9 J7 J1 J2 C5 c...

Страница 10: ...ally instable behavior of the MOSFETs For that reason the Demonstrator Board is shipped in low quiescent current mode during initial evaluation the risk of damaging the MOSFETs through thermal runaway is thus reduced Nevertheless by modifying one resistor value the dead time can be shortened and evaluation in enhanced sonic performance mode can take place Changing R9 to a lower value decreases dea...

Страница 11: ...ice This document supersedes and replaces all information supplied prior to the publication hereof Suitability for use Philips Semiconductors products are not designed authorized or warranted to be suitable for use in medical military aircraft space or life support equipment nor in applications where failure or malfunction of a Philips Semiconductors product can reasonably be expected to result in...

Страница 12: ...ment and the product s described herein have been included in section Legal information 8 Contents 1 Introduction 3 2 Circuit diagram 4 3 Printed circuit board layout 5 4 Specifications 6 4 1 Pop less click less start up and shutdown 6 4 2 Overcurrent protection 6 4 3 Important notice 7 5 Wiring diagram and powering up 7 6 Adding external features 8 6 1 Electronic enabling disabling of the amplifi...

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