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SA58637BS

2 × 2.2 W BTL audio amplifier

NXP Semiconductors. 

NXP Semiconductors

SA58637

2 × 2.2 W BTL audio amplifier

13. Application information

13.1 BTL application

Tamb = 25 °C, VCC = 9 V, f = 1 kHz, RL = 8 Ω, Gv = 20 dB, audio band-pass 22 Hz to

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

1 µF R1

10 kΩ

VI

R2

50 kΩ

INL− 15 17

INL+ 14

C3

47 µF

10

16 OUTL−

1 OUTL+

100 nF

VCC

100 µF

RL

1 µF R3

SA58637

INR− 12

10 kΩ

VI

R4

INR+ 13

50 kΩ

SVR 3

11 OUTR−

RL

MODE 2

6 OUTR+

SELECT 4

20

7

GND

001aah746

Gain left = 2 × -RR----21-

Fig 3.

Gain right = 2 × -RR----43-

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

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

configuration

SA58637_1

Product data sheet

Rev. 01 — 25 February 2008

© NXP B.V. 2008. All rights reserved.

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