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1

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2

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D

D

C

C

B

B

A

A

Title

Number

Revision

Size

B

Date:

5/05/2004

Sheet of

File:

H:\Electronics\..\ThunderBall.SchDoc

Drawn By:

2

3

6

4

7

1

8

5

LF347N Quad OpAmp (1)

O1

2

3

6

4

7

1

8

5

LF347N Quad OpAmp (2)

O3

2

3

6

4

7

1

8

5

LF347N Quad OpAmp (3)

O4

2

3

6

4

7

1

8

5

KA319 Dual Comparator

O5

2

3

6

4

7

1

8

5

KA319 Dual Comparator

O6

2

3

6

4

7

1

8

5

LF347N Quad OpAmp (4)

O2

10k

Res2

R3

5,6K

Res2

R6

33k

Res2

R5

5,6k

Res2

R7

820k

Res2

R2

100K

Res2

R4

100pF

Cap

C3

100nF

Cap

C4

100nF

Cap

C1

470nF

Cap

C2

AudioIn

+12

+12

+12

+12

+12

+12

VGnd

VGnd

VGnd

VGnd

VGnd

20K

RPot2

R1

+12

Triangle Inverter

Triangle Wave Generator

Comparator Stage (PWM Generation)

LO

1

COM

2

VCC

3

NC

4

VS

5

VB

6

HO

7

NC

8

V+

9

HIN

10

SD

11

LIN

12

V-

13

NC

14

IR2112

U1

LO

1

COM

2

VCC

3

NC

4

VS

5

VB

6

HO

7

NC

8

V+

9

HIN

10

SD

11

LIN

12

V-

13

NC

14

IR2112

U2

BUZ11

Q1

BUZ11

Q2

BUZ11

Q3

BUZ11

Q4

20R

Res2

R10

20R

Res2

R11

20R

Res2

R12

20R

Res2

R13

+35V

+35V

220uH

Inductor Ferrite

L1

220uH

Inductor Ferrite

L2

220uH

Inductor Ferrite

L4

220uH

Inductor Ferrite

L3

470nF

Cap

C14

Speaker

LS1

100nF

Cap

C12

100nF

Cap

C13

100nF

Cap

C10

100nF

Cap

C11

D Schottky

D5

D Schottky

D3

D Schottky

D6

D Schottky

D4

Power Stage

Diode

D1

Diode

D2

+35V

1000uF

Cap Pol1

C15

+35V

1000uF

Cap Pol1

C16

VGnd

VGnd

VGnd

+12

100nF

Cap

C6

100nF

Cap

C7

VGnd

+12

100nF

Cap

C8

100nF

Cap

C9

1,5K

Res2

R8

1,5K

Res2

R9

+12

+12

47uF

Cap

C5

ThunderBall Class D Amplifier

Felix Schill

0.1 (Prototype built)