MAX9788 Datasheet, PDF (1/15 Pages) Maxim Integrated Products – 14VP-P,Class G Ceramic Speaker Driver

19-0710; Rev 0; 12/06
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14V_P-P, Class G Ceramic Speaker Driver
General Description
The MAX9788 features a mono Class G power amplifier
with an integrated inverting charge-pump power supply
specifically designed to drive the high capacitance of a
ceramic loudspeaker. The charge pump can supply
greater than 700mA of peak output current at 5.5VDC,
guaranteeing an output of 14V_P-P.
The MAX9788 maximizes battery life by offering high-
performance efficiency. Maxim’s proprietary Class G
output stage provides efficiency levels greater than
Class AB devices without the EMI penalties commonly
associated with Class D amplifiers.
The MAX9788 is ideally suited to deliver the high out-
put-voltage swing required to drive ceramic/piezoelec-
tric speakers.
The device utilizes fully differential inputs and outputs,
comprehensive click-and-pop suppression, shutdown
control, and soft-start circuitry. The MAX9788 is fully spec-
ified over the -40°C to +85°C extended temperature range
and is available in small lead-free 28-pin TQFN (4mm x
4mm) or 20-bump UCSP™ (2mm x 2.5mm) packages.
Cell Phones
Smartphones
MP3 Players
Applications
Personal Media Players
Handheld Gaming
Consoles
Notebook Computers
Features
o Integrated Charge-Pump Power Supply—No
Inductor Required
o 14V_P-P Voltage Swing into Piezoelectric Speaker
o 2.7V to 5.5V Single-Supply Operation
o Clickless/Popless Operation
o Small Thermally Efficient Packages
4mm x 4mm 28-Pin TQFN
2mm x 2.5mm 20-Bump UCSP
Ordering Information
PART
TEMP RANGE
PIN-
PACKAGE
PKG
CODE
MAX9788EBP+T* -40°C to +85°C 20 UCSP-20 B20-7
MAX9788ETI+ -40°C to +85°C 28 TQFN-EP** T2844-1
+Denotes lead-free package.
*Future product—contact factory for availability.
**EP = Exposed pad.
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+
MAX9788
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.