SA58631 데이터 시트보기 (PDF) - NXP Semiconductors.

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SA58631

3 W BTL audio amplifier

NXP Semiconductors. 

NXP Semiconductors

SA58631

3 W BTL audio amplifier

14.3 Single-ended application

Tamb = 25 °C; VCC = 7.5 V; f = 1 kHz; RL = 8 Ω; Gv = 20 dB; audio band-pass 20 Hz to

20 kHz.

The Single-Ended (SE) application diagram is shown in Figure 20.

C1

R1

1 µF 11 kΩ

VI

R2

110 kΩ

IN− 4

IN+ 3

SVR 2

C2

47 µF

MODE

1

6

SA58631

5 OUT−

100 nF

C3

470 µF

8 OUT+

7

GND

VCC

100 µF

RL

002aac041

Gain = -RR----21-

Fig 20. SE application circuit configuration

The capacitor value of C3 in combination with the load impedance determines the low

frequency behavior. The total harmonic distortion + noise as a function of frequency was

measured with a low-pass filter of 80 kHz. The value of the capacitor C2 influences the

behavior of the PSRR at low frequencies; increasing the value of C2 increases the

performance of PSRR.

14.4 General remarks

The frequency characteristics can be adapted by connecting a small capacitor across the

feedback resistor. To improve the immunity of HF radiation in radio circuit applications, a

small capacitor can be connected in parallel with the feedback resistor (56 kΩ); this

creates a low-pass filter.

SA58631_2

Product data sheet

Rev. 02 — 12 October 2007

© NXP B.V. 2007. All rights reserved.

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