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MAX98500

Description
Boosted 2.2W Class D Amplifier with Automatic Level Control
File Size1MB,15 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
Download Datasheet Compare View All

MAX98500 Overview

Boosted 2.2W Class D Amplifier with Automatic Level Control

19-5189; Rev 0; 5/10
Boosted 2.2W Class D Amplifier
with Automatic Level Control
General Description
The MAX98500 is a high-efficiency, Class D audio ampli-
fier that features an integrated boost converter to deliver
a constant output power over a wide range of battery
supply voltages.
The boost converter operates at 2MHz, requiring only a
small (2.2FH) external inductor and capacitor.
The automatic level control has a battery tracking func-
tion that reduces the output swing as the supply voltage
drops, preventing collapse of battery voltage.
The amplifier has differential inputs and an internal fully
differential design. The MAX98500 also features three
gain settings (6dB, 15.5dB, and 20dB) that are select-
able with a logic input.
The MAX98500 is available in a small, 0.5mm pitch
16-bump WLP package (2.1mm x 2.1mm). It is specified
over the extended -40NC to +85NC temperature range.
S
Boosted Class D Output
S
Integrated Automatic Level Control
S
Output Power
2.2W into 8I, 10% THD+N
1.7W into 8I, 1% THD+N
S
Wide 2.5V to 5.5V Supply Voltage Range
S
Undervoltage Lockout Protection
S
High Total Efficiency of 87%
S
High Step-Up Switching Frequency (2MHz)
S
Active Emission Limiting for Low EMI
Features
MAX98500
Applications
Cell Phones
Smartphones
GPS Devices
Mobile Internet Devices
Active Speaker Accessories
PART
Ordering Information
TEMP RANGE
PIN-PACKAGE
MAX98500EWE+
16 WLP
-40NC to +85NC
+Denotes
a lead(Pb)-free/RoHS-compliant package.
Typical Application Circuit appears at end of data sheet.
Simplified Block Diagram
BATTERY
V
BAT
B4
SDBST D4
SDSPK C3
GAIN B2
RKNEE
B3
CONTROL
A3
BOOST CONVERTER
A2
LX
V
CCOUT
MAX98500
A1 PVDD
INP D2
INN D3
B1 SPKP
DIFFERENTIAL
INPUT
C4
AGND
A4
BSTPGND
GAIN
D1, C2
SPKPGND
OUTPUT
STAGE
C1 SPKN
_______________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.

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