MAX9701 MAXIM [Maxim Integrated Products], MAX9701 Datasheet - Page 11

• Manufacturer Part Number: MAX9701
• Description: 1.3W, Filterless, Stereo Class D Audio Power Amplifier
• Manufacturer: MAXIM [Maxim Integrated Products]

Figure 2. MAX9701 Outputs with an Input Signal Applied (SSM Mode)
The MAX9701 features two fixed-frequency modes.
Connect SYNC to GND to select a 1.1MHz switching fre-
quency. Leave SYNC unconnected to select a 1.4MHz
switching frequency. The frequency spectrum of the
MAX9701 consists of the fundamental switching frequen-
cy and its associated harmonics (see the Wideband FFT
graph in the Typical Operating Characteristics). Program
the switching frequency so the harmonics do not fall
within a sensitive frequency band (Table 1). Audio repro-
duction is not affected by changing the switching fre-
quency.
V
OUT_+
V
V
IN_+
IN_-
- V
OUT_-
OUT_+
OUT_-
______________________________________________________________________________________
t
ON(MIN)
Fixed-Frequency (FFM) Mode
1.3W, Filterless, Stereo Class D Audio
Operating Modes
t
SW
t
SW
Table 1. Operating Modes
Unconnected
Clocked
SYNC
t
GND
SW
V
DD
Power Amplifier
FFM with f
FFM with f
SSM with f
FFM with f
t
SW
OSC
OSC
OSC
OSC
= 1100kHz
= 1400kHz
= external clock frequency
= 1200kHz ±60kHz
MODE
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