Rainbow Electronics MAX9730 - Manual

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.
Features
♦ 2.7V to 5.5V Operation
♦ Integrated Charge-Pump Power Supply
♦ 63% Efficiency (V
CC = 5V, P OUT = 1W)
♦ 2.4W Output Power into 8Ω at V
CC
= 3.3V
♦ Up to 2.4W Instantaneous Output Power into 8Ω
♦ Clickless/Popless Operation
♦ Small Thermally Efficient Packages
2mm x 2.5mm 20-Bump UCSP
4mm x 4mm 28-Pin TQFN
MAX9730
2.4W, Single-Supply, Class G Power Amplifier
________________________________________________________________ Maxim Integrated Products 1
PART TEMP RANGE
PIN-
PACKAGE PKG
CODE
MAX9730EBP+T* -40°C to +85°C 20 UCSP-20 B20-7
MAX9730ETI -40°C to +85°C 28 TQFN-EP** T2844-1
Ordering Information
MAX9730
+
IN+
FB+
R IN+
CPV DD
2.7V TO 5.5V
R IN-
C IN
C IN
IN-
FB-
OUT+
OUT-
-
CLASS G
OUTPUT
STAGE
CHARGE
PUMP
R
FB+
R FB-
V CC
CPGND GND
Simplified Block Diagram
19-0701; Rev 0; 12/06
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.
EVALUATION KIT
AVAILABLE
MP3 Players
Personal Media Players
Handheld Gaming
Consoles Cell Phones
Smartphones
Notebook Computers
Applications
Typical Application Circuit/Functional Diagram and Pin
Configurations appear at end of data sheet.
UCSP is a trademark of Maxim Integrated Products, Inc.
+ Denotes lead-free package.
* Future product—contact factory for availability.
** EP = Exposed pad.