MAX9730 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 2.4W, Single-Supply, Class G Power Amplifier

19-0701; Rev 0; 12/06
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2.4W, Single-Supply, Class G Power Amplifier
General Description
The MAX9730 features a mono Class G power amplifier
with an integrated inverting charge-pump power supply.
The charge pump can supply up to 500mA of peak out-
put current over a 2.7VDC to 5.5VDC supply voltage
range, guaranteeing up to 2.4W output power into an
8Ω load. The 2.4W output power allows for transient
audio content to remain unclipped as the battery rail col-
lapses over time.
The MAX9730 maximizes battery life by offering high-
performance efficiency. Maxim’s proprietary output
stage provides efficiency levels greater than Class AB
devices without the EMI penalties commonly associat-
ed with Class D amplifiers. High efficiency allows the
MAX9730 to be packaged in a UCSP™ package with-
out derating the output power handling capability.
The device utilizes fully differential inputs and outputs,
comprehensive click-and-pop suppression, shutdown
control, and soft-start circuitry. The MAX9730 is fully
specified over the -40°C to +85°C extended tempera-
ture range and is available in ultra-small, lead-free,
20-bump UCSP (2mm x 2.5mm) and 28-pin TQFN
(4mm x 4mm) packages.
Applications
MP3 Players
Personal Media Players
Handheld Gaming
Consoles
Cell Phones
Smartphones
Notebook Computers
Features
o 2.7V to 5.5V Operation
o Integrated Charge-Pump Power Supply
o 63% Efficiency (V_CC = 5V, P_OUT = 1W)
o 2.4W Output Power into 8Ω at V_CC = 3.3V
o Up to 2.4W Instantaneous Output Power into 8Ω
o Clickless/Popless Operation
o Small Thermally Efficient Packages
2mm x 2.5mm 20-Bump UCSP
4mm x 4mm 28-Pin TQFN
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
MAX9730EBP+T* -40°C to +85°C 20 UCSP-20
MAX9730ETI
-40°C to +85°C 28 TQFN-EP**
+Denotes lead-free package.
*Future product—contact factory for availability.
**EP = Exposed pad.
PKG
CODE
B20-7
T2844-1
Typical Application Circuit/Functional Diagram and Pin
Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
Simplified Block Diagram
2.7V TO 5.5V
VCC
CPVDD
FB+
MAX9730
C_IN
R_FB+
R_IN+
IN+ ₊
IN-
-
C_IN
R_IN-
R_FB-
FB-
CLASS G
OUTPUT
STAGE
OUT+
OUT-
CHARGE
PUMP
GND
CPGND
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.