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MAX9742
Single-/Dual-Supply, Stereo 16W, Class D Amplifier with Differential Inputs
High-Efficiency Class D Amplifier Drives 4Ω Loads with 87% Efficiency, 8Ω Loads with 92% Efficiency
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Status
Active: In Production.
Description
The MAX9742 stereo Class D audio power amplifier delivers up to 2 x 16W into 4Ω loads. The MAX9742 features high-power efficiency (92% with 8Ω loads), eliminating the need for a bulky heatsink and conserving power. The MAX9742 operates from a 20V to 40V single supply or a ±10V to ±20V dual supply. Features include fully differential inputs, comprehensive click-and-pop suppression, low-power shutdown mode, and an externally adjustable gain. Short-circuit and thermal-overload protection prevent the device from being damaged during a fault condition.
The MAX9742 is available in a thermally efficient 36-pin TQFN (6mm x 6mm x 0.8mm) package and is specified over the -40°C to +85°C extended temperature range.
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Data Sheet
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An evaluation kit is available: MAX9742EVKIT
Key Features
- 2 x 16W Output Power (RL = 4Ω, THD+N = 10%)
- High Efficiency: Up to 92% with RL = 8Ω
- Mute and Shutdown Modes
- Differential Inputs Suppress Common-Mode Noise
- Adjustable Gain
- Integrated Click-and-Pop Suppression
- Low 0.06% THD+N at 3.5W, RL = 8Ω
- Output Short-Circuit and Thermal Protection
- Available in Space-Saving, 6mm x 6mm, 36-Pin TQFN Package
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Applications/Uses
- Audio Docking Stations
- CRT TVs
- Flat-Panel Display TVs
- Multimedia Monitors
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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) |
Spkr. Amp. Half Pwr. THD+N
(%) |
SNR
(dB) |
PSRR
(dB) |
Spkr. Amp. Ext. Gain |
Channels |
Budgetary Price |
| min |
max |
typ |
min |
min |
A- Weighted |
min |
See Notes |
| MAX9742 |
D |
20 |
40 |
15 |
16 |
20.5 |
0.06 |
93 |
68 |
Yes |
2 |
$1.60 @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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Diagram
Simplified Block Diagram
Didn't Find What You Need?
Information Index
Document Ref.: 19-0731
Rev 0;
2007-02-13
This page last modified: 2010-03-12
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