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MAX9741
12W+12W, Low-EMI, Spread-Spectrum, Stereo, Class D Amplifier
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Status
Active: In Production.
Description
The MAX9741 stereo Class D audio power amplifier provides Class AB amplifier performance with Class D efficiency, conserving board space and eliminating the need for a bulky heatsink. Using a Class D architecture, the MAX9741 delivers 12W continuous output power into 8Ω loads. Modulation and switching schemes render the traditional Class D EMI suppression output filter unnecessary.
The MAX9741 offers two modulation schemes: a fixed-frequency mode (FFM), and a spread-spectrum mode (SSM) that reduces EMI-radiated emissions due to the modulation frequency. The device utilizes a fully differential architecture, a full bridged output, and offers comprehensive click-and-pop suppression.
The MAX9741 features high 80dB PSRR, low 0.07% THD+N, and SNR in excess of 100dB. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition. The MAX9741 is available in a 56-pin TQFN (8mm x 8mm x 0.8mm) package. The MAX9741 is specified 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: MAX9741EVKIT
Key Features
- Low EMI
- Unique Spread-Spectrum Mode Offers 5dB Emissions Improvement Over Conventional Methods
- Up to 88% Efficient into 16Ω
- 12W+12W Continuous Output Power into 8Ω
- 15W+15W Continuous Output Power into 16Ω
- Low 0.07% THD+N
- High PSRR (80dB at 1kHz)
- 10V to 25V Single-Supply Operation
- Differential Inputs Minimize Common-Mode Noise
- Pin-Selectable Gain Reduces Component Count
- Industry-Leading Click-and-Pop Suppression
- Low Quiescent Current (24mA)
- Low-Power Shutdown Mode (0.2µA)
- Short-Circuit and Thermal-Overload Protection
- Available in Thermally Efficient, Space-Saving 56-Pin TQFN (8mm x 8mm x 0.8mm) Package
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Applications/Uses
- Automotive
- Desktop PCs
- LCD Monitors
- LCD Projectors
- LCD TVs
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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 4Ω @ 10% THD+N
(W) |
POUT into 8Ω @ 10% THD+N
(W) |
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 |
min |
min |
max |
See Notes |
| MAX9741 |
D |
10 |
25 |
26 |
8.5 |
12 |
70 |
No |
4.5 |
30.2 |
2 |
$2.50 @1k |
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See All Speaker Amplifiers (41)
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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
 Simplilfied Block Diagram
Application Notes
Product Guides
Reliability Reports
| Request Reliability Report for: |
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Software/Models
Ordering Information
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Part Number
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Free
Sample |
Buy |
Status
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Package:
TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
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Temp |
RoHS/Lead-Free?
Materials Analysis
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| MAX9741ETN+D
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Active |
TQFN;56 pin;65.6 mm²
Outline Drawing:21-0135 (PDF)
Land Pattern: 90-0047 (PDF)
Use pkgcode/variation: T5688+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX9741ETN+TD
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Active |
TQFN;56 pin;65.6 mm²
Outline Drawing:21-0135 (PDF)
Land Pattern: 90-0047 (PDF)
Use pkgcode/variation: T5688+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
Notes:
- Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
- Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
- Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product Naming Conventions.
- * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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Similar Products by Function
| MAX9708 |
20W/40W, Filterless, Spread-Spectrum, Mono/Stereo, Class D Amplifier |
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Similar Products by Application
Evaluation Kits
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More Information
Didn't Find What You Need?
Information Index
Document Ref.: 19-3887
Rev 0;
2006-02-24
This page last modified: 2010-05-04
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