max9706etxt Maxim Integrated Products, Inc., max9706etxt Datasheet - Page 12

• Manufacturer Part Number: max9706etxt
• Description: 3-channel, 2.3w, Filterless Class D Amplifiers With Active Crossover
• Manufacturer: Maxim Integrated Products, Inc.

3-Channel, 2.3W, Filterless Class D Amplifiers
with Active Crossover
12
MAX9706 MAX9707
5, 23, 31
8, 20, 34
10
11
12
13
14
15
16
17
18
19
21
22
24
25
26
______________________________________________________________________________________
1
2
3
4
6
7
9
PIN
5, 23, 31
8, 20, 34
—
—
—
—
—
14
—
—
—
—
—
21
22
24
25
26
1
2
3
4
6
7
SYNC_OUT
SYNC_IN
CPGND
OUTR+
OUTL+
CPV
HPV
OUTR-
NAME
OUTL-
CPV
PGND
SHDN
PV
BIAS
GND
C1N
HPS
HPR
V
C1P
HPL
V
FS0
FS1
DD
SS
DD
DD
DD
SS
Internal Bias. Bypass BIAS to GND with a 1µF capacitor.
Ground. Star connect to PGND (see the Supply Bypassing, Layout, and Grounding section).
Main Power Supply. Connect V
capacitor.
Synchronization Clock Output. Connect SYNC_OUT to other Class D amplifiers to maintain
synchronization. SYNC_OUT is a CMOS output proportional to V
used.
Power Ground. PGND is the ground connection for the speaker amplifiers.
Left-Speaker Negative Terminal
Left-Speaker Positive Terminal
Output Power Supply. PV
V
Charge-Pump Positive Supply. Connect CPV
1µF capacitor.
Charge-Pump Flying Capacitor Positive Terminal. Connect a 1µF capacitor from C1P to C1N.
Charge-Pump Ground. Connect to PGND.
Charge-Pump Flying Capacitor Negative Terminal. Connect a 1µF capacitor from C1N to C1P.
Negative Supply Charge-Pump Output. Bypass CPV
Connect CPV
Frequency Select or External Clock Input. Connect SYNC_IN to GND, V
drive with an externally generated clock to control the switching frequency of the Class D
amplifiers. See Table 1.
Headphone Sense. HPS is a digital input with a pullup resistor to detect the connection of a
headphone. When HPS is high, the headphone amplifier is enabled and the Class D speaker
amplifiers are disabled. See the Headphone Sense Input (HPS) section.
Headphone Amplifier Negative Supply. Connect V
Right Headphone Output
Left Headphone Output
Positive Supply for Headphone Amplifiers. Connect HPV
with a 0.1µF capacitor.
Right-Speaker Positive Terminal
Right-Speaker Negative Terminal
Shutdown Input. Drive SHDN low to put the MAX9706/MAX9707 in low-power shutdown mode.
Drive SHDN high or connect to V
Crossover Frequency Select. Connect FS0 and FS1 to GND or V
frequency. See Table 4.
DD
. Bypass each PV
SS
to V
SS
DD
.
DD
to its corresponding PGND with a 1µF capacitor.
is the power connection for the speaker amplifiers. Connect to
DD
DD
to a low-noise 5V source. Bypass V
to enable normal operation.
FUNCTION
DD
to HPV
SS
SS
to CPV
DD
to PGND with a 1µF capacitor.
DD
. Bypass CPV
to V
SS
.
DD
DD
DD
. Bypass HPV
Pin Description
. Float SYNC_OUT, if not
to set the crossover
DD
DD
DD
to GND with a 1µF
, leave floating, or
to CPGND with a
DD
to PGND