TFA9812HN/N1,518 Datasheet TFA9812HN/N1,518, TFA9812HN/N1,557 | P55-P57

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Preliminary data sheet Rev. 02 — 22 January 2009 55 of 66

NXP Semiconductors

TFA9812

BTL stereo Class-D audio ampliﬁer with I

2

S input

14.4.4 I

2

S master mode and I

2

C control mode

Fig 16. Simpliﬁed application diagram for I

2

S master mode and I

2

C control mode

TFA9812

ADSEL1/PLIM1

OUT1N

BOOT2P

OUT2P

V

DDP

V

DDP

OUT1P

BOOT1P

OUT2N

ADSEL2/PLIM2

XTALIN

XTALOUT

V

DDA(3V3)

STABA

REFA

V

DDA

TEST1

V

SS1

STAB2

V

SSP2

V

SSP2

BOOT2N

CSEL

GAIN

ENABLE

AVOL

POWERUP

CDELAY

DIAG

STAB1

V

SSP1

V

SSP1

BOOT1N

SCL/SFOR

SDA/MS

V

DDD(3V3)

STABD

REFD

TEST2

DATA

WS

BCK

MCLK

V

SS2

EXPOSED DIE PADDLE

36

37

38

39

40

41

42

43

44

45

46

47

48

35 34 33 32 31 30 29 28 27 26 25

ENABLE

POWERUP

DIAGNOSTIC

C

DELAY

1 nF

C

STAB

100 nF

I

2

C SCL

I

2

C SDA

I

2

S DATA

I

2

S WS

I

2

S BCK

I

2

S MLCK

VDDD

C

VDDD

100 nF

C

STABD

1 µF

C

VDDA

100 nF

3.3 V VPA

C

STAB

100 nF

C

VPA

100 nF

C

STAB

100 nF

12 3 456789101112

010aaa479

C

BOOT

15 nF

C

SN

470 pF

C

SN

470 pF

C

LC

680 nF

C

LC

680 nF

C

BOOT

15nF

R

SN

10 Ω

R

SN

10 Ω

C

LC

680 nF

C

LC

680 nF

Lic

S2F2

S1 F1

15 µH

24

23

22

21

20

19

18

17

16

15

14

13

C

VDDP

C

VDDP

VP

OUT1

+

−

6 Ω to 8 Ω

OUT2

+

−

6 Ω to 8 Ω

C

BOOT

105 nF

C

BOOT

15 nF

F2 S2

F1S1

15 µH

Lic

R

SN

10 Ω

R

SN

10 Ω

C

SN

470 pF

C

SN

470 pF

3.3 V

XTALL

C

XTALL

18 pF

C

XTALL

18 pF

POWER IN

V

P

= 8 V to 20 V

GND

C

VDDP

220 µF / 25 V

R

VDDA

10 Ω

VPA

VP

100 nF

R

STABA

1 kΩ

Preliminary data sheet Rev. 02 — 22 January 2009 56 of 66

NXP Semiconductors

TFA9812

BTL stereo Class-D audio ampliﬁer with I

2

S input

14.5 Curves measured in typical application

(1) f

i

= 6 kHz

(2) f

i

= 1 kHz

(3) f

i

= 100 Hz

(1) f

i

= 6 kHz

(2) f

i

= 1 kHz

(3) f

i

= 100 Hz

a. V

P

= 12 V; R

L

= 2 × 6 Ω b. V

P

= 12 V; R

L

= 2 × 8 Ω

(1) f

i

= 6 kHz

(2) f

i

= 1 kHz

(3) f

i

= 100 Hz

(1) f

i

= 6 kHz

(2) f

i

= 1 kHz

(3) f

i

= 100 Hz

c. V

P

= 15 V; R

L

= 2 × 6 Ω d. V

P

= 15 V; R

L

= 2 × 8 Ω

Fig 17. Total harmonic distortion-plus-noise as a function of output power

010aaa480

1

10

−1

10

THD+N

(%)

10

−2

P

o

(W/channel)

10

−2

10

2

1010

−1

1

(1)

(2)

(3)

010aaa481

1

10

−1

10

THD+N

(%)

10

−2

P

o

(W/channel)

10

−2

10

2

1010

−1

1

(1)

(2)

(3)

010aaa482

1

10

−1

10

THD+N

(%)

10

−2

P

o

(W/channel)

10

−2

10

2

1010

−1

1

(1)

(2)

(3)

010aaa483

1

10

−1

10

THD+N

(%)

10

−2

P

o

(W/channel)

10

−2

10

2

1010

−1

1

(1)

(2)

(3)

Preliminary data sheet Rev. 02 — 22 January 2009 57 of 66

NXP Semiconductors

TFA9812

BTL stereo Class-D audio ampliﬁer with I

2

S input

a. V

P

= 12 V; R

L

= 2 × 6 Ω; P

o

= 1 W b. V

P

= 12 V; R

L

= 2 × 8 Ω; P

o

= 1 W

Fig 18. Total harmonic distortion-plus-noise as a function of frequency

010aaa484

1

10

−1

10

THD+N

(%)

10

−2

f (Hz)

10 10

5

10

4

10

2

10

3

010aaa485

1

10

−1

10

THD+N

(%)

10

−2

f (Hz)

10 10

5

10

4

10

2

10

3

V

P

= 12 V; P

O

= 1 W

(1) R

L

= 6 Ω 15 µH / 680 µF

(2) R

L

= 8 Ω 15 µH / 680 µF

V

P

= 12 V; R

L

= 8 Ω; f

i

= 1 kHz

(1) 0 dB

(2) 24 dB gain boost

Fig 19. Gain as a function of frequency Fig 20. Gain as a function of AVOL

010aaa486

−1

1

3

G

(dB)

−3

f (Hz)

10 10

5

10

4

10

2

10

3

(1)

(2)

AVOL (V)

03210.5 1.5 2.5

010aaa487

−80

−100

−60

−20

−40

0

G

(dB)

−120

(1)(2)

TFA9812HN/N1,518

TFA9812HN/N1,518

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