SA58632 Datasheet, PDF (15/26 Pages) NXP Semiconductors – 2 x 2.2 W BTL audio amplifier

Philips Semiconductors
SA58632
2 × 2.2 W BTL audio amplifier
14.4 Single-ended application
T_amb = 25 °C; V_CC = 7.5 V; f = 1 kHz; R_L = 8 Ω; G_v = 20 dB; audio band-pass 20 Hz to
20 kHz.
The single-ended application diagram is shown in Figure 15.
1 µF _R1
10 kΩ
R2
100 kΩ
VIL
C3
47 µF
INL− ₁₅ 17
INL+ ₁₄
V_CC
100 nF
100 µF
10
16 ^OUTL−
C4
470 µF
RL = 8 Ω
1 µF _R3
10 kΩ
VIR
OUTR−
R4
100 kΩ
INR− ₁₂
INR+ ₁₃
SVR ₃
MODE ₂
BTL/SE ₄
SA58632
20 7
OUTL+
1
11 ^OUTR−
6 ^OUTR+
C5
470 µF
RL = 8 Ω
GND
002aac091
Gain left = -^RR----²¹-
Gain right = -^RR----⁴³-
Pins 8, 9, 18 and 19 connected to ground.
Fig 15. SE application circuit configuration
If the BTL/SE pin is to ground, the positive outputs (OUTL+, OUTR+) will be in mute
condition with a DC level of 0.5V_CC. When a headphone is used (R_L > 25 Ω) the SE
headphone application can be used without coupling capacitors by placing the load
between negative output and one of the positive outputs (for example, pin 1) as the
common pin.
Increasing the value of the tantalum or electrolytic capacitor C3 will result in a better
channel separation. Because the positive output is not designed for high output current
(2 × I_O) at the load impedance (< 16 Ω), the SE application with output capacitors
connected to ground is advised. The capacitor value of C4/C5 in combination with the
load impedance determines the low frequency behavior. The total harmonic
distortion-plus-noise as a function of frequency was measured with a low-pass filter of
80 kHz. The value of the capacitor C3 influences the behavior of the PSRR at low
frequencies; increasing the value of C3 increases the performance of PSRR.
SA58632_1
Product data sheet
Rev. 01 — 27 June 2006
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
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