SA58631 NXP Semiconductors, SA58631 Datasheet - Page 8

• Manufacturer Part Number: SA58631
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SA58631_2
Product data sheet
Fig 4. Output power versus supply voltage @
(W)
P
o
6.0
4.0
2.0
0
THD+N = 10 %; 32 cm
0
14.2 BTL application
5.0
T
20 kHz. The BTL diagram is shown in
The quiescent current has been measured without any load impedance. The total
harmonic distortion + noise (THD+N) as a function of frequency was measured with a
low-pass filter of 80 kHz. The value of capacitor C2 influences the behavior of PSRR at
low frequencies; increasing the value of C2 increases the performance of PSRR.
shows three areas: operating, mute and standby. It shows that the DC switching levels of
the mute and standby respectively depends on the supply voltage level.
The following characterization curves show the room temperature performance for
SA58631 using the demo PCB shown in
versus output power
spreader area, load resistance and voltage gain show that there is very little difference in
performance with voltage gain; however, there are significant differences with supply
voltage and load resistance.
The curves for THD+N versus output power
best power output using an 8
delivers typically 3 W output power for THD+N = 10 %.
R
amb
L
= 8
16
10.0
= 25 C, V
2
(5 in
2
15.0
) heat spreader
CC
V
002aac008
CC
= 9 V, f = 1 kHz, R
(V)
(Figure 10
20.0
Rev. 02 — 12 October 2007
through
load at 9 V supply. Under these conditions the part
Fig 5. Power dissipation versus ambient temperature
L
(W)
(1) No heat spreader.
(2) Top only heat spreader (9.7 cm
(3) Both top and bottom heat spreader (approximately
Figure
P
= 8 , G
5.0
4.0
3.0
2.0
1.0
Figure
Figure
0
(1 ounce) copper).
32 cm
0
(Figure
(3)
(2)
(1)
3.
2
v
17) as a function of supply voltage, heat
21. The 8 curves for power dissipation
(5 in
= 20 dB, audio band-pass 20 Hz to
2
18) show that the SA58631 yields the
), 35 m (1 ounce) copper).
50
3 W BTL audio amplifier
100
2
(1.5 in
T
SA58631
© NXP B.V. 2007. All rights reserved.
amb
002aac009
2
), 35 m
( C)
150
Figure 6
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