MAX9788
MAX9788 is Class G Ceramic Speaker Driver manufactured by Maxim Integrated.
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 700m A of peak output current at 5.5VDC, guaranteeing an output of 14VP-P.
The MAX9788 maximizes battery life by offering highperformance efficiency. Maxim’s proprietary Class G output stage provides efficiency levels greater than Class AB devices without the EMI penalties monly associated with Class D amplifiers.
The MAX9788 is ideally suited to deliver the high output-voltage swing required to drive ceramic/piezoelectric speakers.
The device utilizes fully differential inputs and outputs, prehensive click-and-pop suppression, shutdown control, and soft-start circuitry. The MAX9788 is fully specified 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 WLP (2mm x 2.5mm) packages.
Cell Phones Smartphones MP3 Players
Applications
Personal Media Players Handheld Gaming Consoles Notebook puters
Features
- Integrated Charge-Pump Power Supply- No Inductor Required
- 14VP-P Voltage Swing into Piezoelectric Speaker
- 2.7V to 5.5V Single-Supply Operation
- Clickless/Popless Operation
- Small Thermally Efficient Packages
4mm x 4mm 28-Pin TQFN 2mm x 2.5mm 20-Bump WLP
Ordering Information
PART
PIN-PACKAGE
MAX9788EWP+TG45 20 WLP
MAX9788ETI+
28 TQFN-EP-
+Denotes a lead-free package.
T = Tape and reel. G45 indicates protective die coating.
- EP = Exposed pad.
TEMP RANGE -40°C to +85°C -40°C to +85°C
Typical Application Circuit/Functional Diagram and Pin Configurations appear at end of data sheet.
Simplified Block Diagram
2.7V TO 5.5V
VCC CPVDD
FB+
RFB+ RIN+
IN+ +
IN-
- CIN
RINRFB-
FB-
CLASS G OUTPUT STAGE
OUT+ OUT-
CHARGE PUMP
GND...
