SA58672 Datasheet, PDF (17/27 Pages) NXP Semiconductors – 3.0 W mono class-D audio amplifier

NXP Semiconductors
SA58672
3.0 W mono class-D audio amplifier
12. Test information
12.1 Test setup for typical characterization curves
The SA58672 demo board shown in Figure 14 and the APA (Audio Precision Analyzer)
are used to provide the characterization curves. The test setup diagram in Figure 15
shows the setup details. The output load configuration is comprised of 2 × 15 µH power
inductors and precision power load resistor. This passive load emulates a small, low
power speaker; it facilitates efficiency measurements. A speaker may be substituted for
the passive load to yield similar results.
AP585
AUDIO
ANALYZER
INP
OUTP
DUT
INM
OUTM
15 µH
15 µH
AUX0025
RL
30 kHz
LOW-PASS FILTER
+−
POWER
SUPPLY
(1) DUT is the SA58672 evaluation demo board.
Fig 15. SA58672 test setup block diagram
AP585
MEASUREMENT
INPUTS
002aad855
SA58672_4
Product data sheet
Rev. 04 — 8 June 2009
© NXP B.V. 2009. All rights reserved.
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