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MAX98400A, MAX98400B
Stereo, High-Power, Class D Amplifier
Differential Input, Power Limiting, Anticlipping, Thermal Foldback, and Excellent EMI Performance
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Status
Active: In Production.
Description
The MAX98400A/MAX98400B Class D amplifiers provide high-performance, thermally efficient amplifier solutions. The MAX98400A delivers 2x20W into 8Ω loads or 1x40W into a 4Ω load. The MAX98400B delivers 2x12W into 8Ω loads.
An integrated limiting circuit prevents output clipping distortion, protects small speakers from transient voltages, and reduces power dissipation.
A thermal-foldback feature can be enabled to automatically reduce the output power at above a junction temperature of +120°C. Traditional thermal protection is also available in addition to robust overcurrent protection.
The ICs operate from a single 8V to 28V supply and provide a high 67dB PSRR, eliminating the need for a regulated power supply. They offer up to 90% efficiency from a 12V supply.
Filterless modulation allows the ICs to pass EN55022B EMI limits with 1m cables using only a low-cost ferrite bead and small-value capacitor on each output.
Both devices feature eight-digitally-controlled gain settings.
Comprehensive click-and-pop reduction circuitry minimizes noise coming into and out of shutdown.
The MAX98400A/MAX98400B are available in 36-pin and 24-pin TQFN packages, respectively, and are specified over the -40°C to +85°C temperature range.
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Data Sheet
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An evaluation kit is available: MAX98400AEVKIT MAX98400BEVKIT
Key Features
- Wide 8V to 28V Supply Voltage Range
- Single Supply Operation
- Low EMI: Active Emissions Limiting
- Clipping Limiter
- Low Quiescent Current
- Thermal Foldback
- Thermal and Overcurrent Protection
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Applications/Uses
- LCD Monitors
- LCD/PDP Televisions
- MP3 Docking Stations
- Notebook PCs
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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 @ 1% THD+N
(W) |
POUT into 4Ω @ 10% THD+N
(W) |
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 |
min |
min |
A- Weighted |
min |
min |
max |
See Notes |
| MAX98400A |
D |
8 |
28 |
10 |
13 |
17 |
16 |
- |
0.03 |
107 |
67 |
No |
2.8 |
44 |
2 |
$1.28 @1k |
| MAX98400B |
- |
- |
13.5 |
15 |
101 |
$1.02 @1k |
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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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Product Guides
Reliability Reports
| Show FIT data for: |
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| 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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| MAX98400AETX+
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Active |
TQFN;36 pin;37.2 mm²
Outline Drawing:21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX98400AETX+T
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Active |
TQFN;36 pin;37.2 mm²
Outline Drawing:21-0141 (PDF)
Land Pattern: 90-0050 (PDF)
Use pkgcode/variation: T3666+3*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX98400BETG+
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Active |
TQFN;24 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444+4*
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-40°C to +85°C
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RoHS/Lead-Free: Lead Free
Materials Analysis |
| MAX98400BETG+T
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Active |
TQFN;24 pin;16.8 mm²
Outline Drawing:21-0139 (PDF)
Land Pattern: 90-0022 (PDF)
Use pkgcode/variation: T2444+4*
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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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Information Index
Document Ref.: 19-5286
Rev 0;
2010-07-19
This page last modified: 2010-08-17
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