max9706etxt Maxim Integrated Products, Inc., max9706etxt Datasheet - Page 21

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

Use capacitors with an ESR less than 100mΩ for opti-
mum performance. Low-ESR ceramic capacitors mini-
mize the output resistance of the charge pump. Most
surface-mount ceramic capacitors satisfy the ESR
requirement. For best performance over the extended
temperature range, select capacitors with an X7R
dielectric. Table 5 lists suggested manufacturers.
The value of the flying capacitor (C1) affects the output
resistance of the charge pump. A C1 value that is too
small degrades the device’s ability to provide sufficient
current drive, which leads to a loss of output voltage.
Increasing the value of C1 reduces the charge-pump out-
put resistance to an extent. Above 1µF, the on-resistance
of the switches and the ESR of C1 and C2 dominate.
Table 5. Suggested Capacitor Manufacturers
Taiyo Yuden
TDK
3-Channel, 2.3W, Filterless Class D Amplifiers
Charge-Pump Capacitor Selection (MAX9706)
SUPPLIER
______________________________________________________________________________________
Flying Capacitor (C1, MAX9706)
800-348-2496
807-803-6100
PHONE
The output capacitor value and ESR directly affect the
ripple at CPV
output ripple. Likewise, decreasing the ESR of C2
reduces both ripple and output resistance. Lower
capacitance values can be used in systems with low
maximum output power levels. See the Output Power
vs. Charge-Pump Capacitance and Load Resistance
graph in the Typical Operating Characteristics. C2
must be equal to or greater than C1.
The CPV
ance of the power supply and reduces the impact of
the MAX9706’s charge-pump switching transients.
Bypass CPV
physically close to CPV
that is equal to C1.
with Active Crossover
847-925-0899
847-390-4405
DD
FAX
bypass capacitor lowers the output imped-
DD
SS
with a capacitor to CPGND and place it
. Increasing the value of C2 reduces
CPV
Output Capacitor (C2, MAX9706)
DD
Bypass Capacitor (MAX9706)
DD
and CPGND. Use a value
www.component.tdk.com
www.t-yuden.com
WEBSITE
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