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MAX98307, MAX98308
3.3W, Mono Class DG Multilevel Speaker Amplifiers
Delivers the Industry's Highest Output Power, Highest Efficiency, and Smallest Speaker Amplifier Solutions from a Single Li+ Battery
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Status
Active: In Production.
Description
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.
Class DG multilevel modulation extends the dynamic range of the output signal by employing a charge-pump-generated negative rail as needed to extend the supply voltage. This scheme results in high efficiency over a wide output power range.
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.
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 -40°C to +85°C temperature range.
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Data Sheet
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An evaluation kit is available: MAX98307EVKIT
Key Features
- High Efficiency Combined with High Output Power
- Class DG Multilevel Modulation Ensures Maximum Efficiency Over Wide Output Power Range
- Improves Battery Life
- Low 1.85mA Quiescent Current
- High Output Power at 1% THD+N
- 1.54W at VPVDD = 3.6V, 8Ω + 68µH Load
- 2.85W at VPVDD = 5V, 8Ω + 68µH Load
- High Output Power at 10% THD+N
- 1.77W at VPVDD = 3.6V, 8Ω + 68µH Load
- 3.3W at VPVDD = 5V, 8Ω + 68µH Load
- 84% Efficiency (VPVDD = 3.6V, at 500mW Output)
- Active Emissions Limiting and Class DG Multilevel Output Modulation Eliminates EMI Output Filtering Requirement
- Integrated Charge Pump and High Efficiency Results in Small Solution Size
- Excellent RF Immunity
- Click-and-Pop Suppression
- Thermal and Overcurrent Protection
- Low-Current Shutdown Mode
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Applications/Uses
- Cellular Phones
- Notebook Computers
- Portable Audio
- Smartphones
- Tablet PCs
- VoIP Phones
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Key Specifications:
| Speaker Amplifiers |
| Part Number |
Class |
Spkr. Amp. VCC
(V) |
Spkr. Amp. VCC
(V) |
Spkr. Amp. ICC
(mA) |
POUT into 8Ω @ 1% THD+N
(W) |
POUT into 8Ω @ 10% THD+N
(W) |
Spkr. Amp. Half Pwr. THD+N
(%) |
SNR
(dB) |
PSRR
(dB) |
Spkr. Amp. Ext. Gain |
Spkr. Amp. Fxd. Gain
(V/V) |
Spkr. Amp. Fxd. Gain
(V/V) |
Channels |
Budgetary Price |
| min |
max |
typ |
min |
min |
A- Weighted |
min |
min |
max |
See Notes |
| MAX98307 |
DG |
2.6 |
5.25 |
1.85 |
2.85 |
3.3 |
0.05 |
103 |
78 |
Yes |
- |
- |
1 |
$0.55 @1k |
| MAX98308 |
2.7 |
2.13 |
- |
No |
2.7 |
10.6 |
- |
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See All Speaker Amplifiers (44)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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Diagram
Simplified Block Diagrams
More Information
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Information Index
Document Ref.: 19-5848
Rev 4;
2012-04-04
This page last modified: 2012-04-04
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