SA58637_1

© NXP B.V. 2008. All rights reserved.

Product data sheet

Rev. 01 — 25 February 2008

8 of 22

NXP Semiconductors

SA58637

2

× 2.2 W BTL audio amplifier

13. Application information

13.1 BTL application

22 kHz. The single-ended input and BTL differential output diagram is shown in Figure 3.

Pins 8, 9, 18 and 19 connected to ground.

Fig 3.

Application diagram of SA58637 single-ended input and BTL differential output

configuration

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R2

50 k

Ω

SA58637

OUTL

−

INL+

INL

−

GND

SVR

OUTL+

MODE

7

15

14

3

2

16

1

17

C3

47

µF

R1

1

µF

VI

RL

100

µF

100 nF

20

10

R4

50 k

Ω

OUTR

−

INR+

INR

−

OUTR+

12

13

11

6

R3

1

µF

VI

RL

SELECT

4

10 k

Ω

10 k

Ω

Gain left

2

R2

R1

-------

×

=

Gain right

2

R4

R3

-------

×

=