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MAX98307 3.3W Mono Class DG Multilevel Audio Amplifier0 pages
EVALUATION KIT AVAILABLE
MAX98307/MAX98308
3.3W Mono Class DG Multilevel Audio Amplifier
General Description
Benefits and Features
The MAX98307/MAX98308 fully differential mono Class
DG multilevel power amplifiers with integrated inverting
charge pumps offer highly efficient, high-power audio
solutions for portable applications.
StHigh Efficiency Combined with High Output Power
t
Class DG Multilevel Modulation Ensures
t Maximum Efficiency Over Wide Output Power
tRange
Class DG multilevel modulation extends the dynamic
range of the output signal by employing a charge-pumpgenerated negative rail as needed to extend the supply
range. This scheme results in high efficiency over a wide
output power range.
StImproves Battery Life
t
Low 1.85mA Quiescent Current
The ICs combine Maxim’s active emissions limiting edge
rate and overshoot control circuitry with multilevel output modulation to greatly reduce EMI. These features
eliminate the need for output filtering as compared to
traditional Class D devices, reducing component count
and cost.
StHigh Output Power at 10% THD+N
t
1.77W at VPVDD = 3.6V, 8I + 68µH Load
t
3.3W at VPVDD = 5V, 8I + 68µH Load
The MAX98307’s 16-pin TQFN package features an
adjustable gain set by external resistors. The MAX98308’s
space-saving 12-bump WLP package features an internally fixed gain of 8.5dB, 11.5dB, 14.5dB, 17.5dB, and
20.5dB set by a single gain input. Both devices operate
over the extended -40NC to +85NC temperature range.
Applications
StHigh Output Power at 1% THD+N
t
1.54W at VPVDD = 3.6V, 8I + 68µH Load
t
2.85W at VPVDD = 5V, 8I + 68µH Load
St84% Efficiency (VPVDD = 3.6V, at 500mW Output)
StActive Emissions Limiting and Class DG Multilevel
Output Modulation Eliminates EMI Output Filtering
Requirement
StIntegrated Charge Pump and High Efficiency
Results in Small Solution Size
StExcellent RF Immunity
StClick-and-Pop Suppression
StThermal and Overcurrent Protection
StLow-Current Shutdown Mode
Cellular Phones
VoIP Phones
Smartphones
Portable Audio
Notebook Computers
Tablet PCs
Ordering Information appears at end of data sheet.
Simplified Block Diagrams
SHDN
VCC
PVDD
PVSS
SVSS
SHDN
C1P
FB+
CHARGE PUMP
GAIN
PVDD
PVSS
C1P
C1N
MAX98308
MAX98307
CHARGE PUMP
C1N
OUT+
IN+
CLASS DG
AMPLIFIER
IN-
OUT+
IN+
CLASS DG
AMPLIFIER
OUTIN-
OUT-
FBGND
PGND
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
GND
PGND
19-5848; Rev 5; 3/15
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