max9746 Maxim Integrated Products, Inc., max9746 Datasheet - Page 14

• Manufacturer Part Number: max9746
• Description: Max9746 1.2w, Low-emi, Filterless, Class D Audio Amplifier
• Manufacturer: Maxim Integrated Products, Inc.

One solution is the configuration shown in Figure 9b. The
potentiometer is connected between the differential
inputs, and these “see” identical RC paths when the
device powers up. The variable resistive element appears
between the two inputs, meaning the setting affects both
inputs the same way. The potentiometer is audio taper, as
in Figure 9a. This significantly improves transient perfor-
mance on power-up or release from shutdown. A similar
approach can be applied when the MAX9746 is driven
differentially and a volume control is required.
Figure 9a. Single-Ended Drive of MAX9746 Plus Volume
1.2W, Low-EMI, Filterless,
Class D Audio Amplifier
14
______________________________________________________________________________________
50kΩ
CW
1µF
1µF
IN-
IN+
MAX9746
For the latest application details on UCSP construction,
dimensions, tape carrier information, PC board tech-
niques, bump-pad layout, and recommended reflow tem-
perature profile, as well as the latest information on
reliability testing results, refer to the Application Note:
UCSP—A Wafer-Level Chip-Scale Package available on
Maxim’s website at www.maxim-ic.com/ucsp.
Figure 9b. Improved Single-Ended Drive of MAX9746 Plus
Volume
UCSP Applications Information
1µF
1µF
22kΩ
22kΩ
50kΩ
CW
IN-
IN+
MAX9746