EMA2901-2.5W Mono Audio Power Amplifier  DataSheet
General Description
The EMA2901 is an audio power amplifier primarily designed for portable communication applications such as mobile phones and portable multimedia players (PMP). To a 4Ω BTL load, it can deliver 2.5 watt of continuous average power with typical 10% distortion (THD+N) from a 5VDC supply. Typical THD+N is about 1% at 1.8Watt.
The EMA2901 is pin-compatible to National Semi’s LM4990 Micro-SMD package with a superior (THD+N). It does not require output coupling capacitors or bootstrap capacitors, and is ideal for mobile phone and other low voltage applications where minimal power consumption is a primary requirement.
The EMA2901 features a low-power consumption shutdown mode, and an internal thermal shutdown protection mechanism. Advanced pop & click circuitry is built in to eliminate noises that would otherwise occur during turn-on and turn-off transitions. The EMA2901 is unity-gain stable and can be configured by external gain-setting resistors. EMP products are RoHS and Halogen free compliant.
Key Specifications
PSRR at 217Hz, VDD = 5V (Fig. 1) 60dB(typ.)
Po at 5.0V-4 ohm & 1% THD 1.8W(typ.)
Po at 2.6V-4 ohm & 1% THD 500mW(typ.)
Shutdown Current < 1μA(typ.)
Features
Available in space-saving WL-CSP package
Ultra low current shutdown mode
BTL output driving capacitive loads
Improved pop & click circuitry eliminating noises
during turn-on and turn-off transitions
2.5 - 5.5V operation
No output coupling capacitors, snubber networks or
bootstrap capacitors required
Thermal shutdown protection
Unity-gain stable
External gain configuration capability
Applications
Mobile Phones
PDAs and PMPs
Portable Electronic Device
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Audio Power Amplifier > Class A/B |
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Part Number |
Description |
Po(Max output power, W) |
Typical THD+N (%) |
PSRR (dB) |
Vin min(V) |
Vin max(V) |
Shutdown current (uA) |
Earphone |
Package |
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EMA1001 |
1W Mono |
1 (8ohm, 5V, 1%THD+N) |
0.04 (0.4W, 1KHz) |
60 |
2.2 |
5.5 |
0.1 |
N/A |
MSOP-8, SOP-8 |
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EMA1002 |
1W Mono with Headphone Sense |
1 (8ohm, 5V, 1%THD+N) |
0.04 (0.4W, 1KHz) |
60 |
2.2 |
5.5 |
0.1 |
Yes |
MSOP-8 |
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EMA1003 |
1.2W Mono Fully Differential with Shutdown Select |
1.2 (8ohm, 5V, 1%THD+N) |
0.008 (0.4W, 8ohm, 1KHz) |
70 |
2.2 |
5.5 |
0.1 |
N/A |
MSOP-10 (FD) |
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EMA1901 |
1.25W Mono |
1.25 (8ohm, 5V, 1%THD+N) |
0.01 (0.4W, 1KHz) |
60 |
2.5 |
5.5 |
0.1 |
N/A |
WL-CSP |
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EMA1903 |
1W Mono Fully Differential with Shutdown Select |
1 (8ohm, 5V, 1%THD+N) |
0.008 (0.4W, 8ohm, 1KHz) |
73 |
2.2 |
5.5 |
0.1 |
N/A |
WL-CSP |
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EMA2001 |
3W Mono with Shutdown mode |
3 (3ohm, 5V, 10%THD+N) |
0.02 (1W, 4ohm, 1KHz) |
60 |
2.6 |
5.5 |
0.1 |
N/A |
MSOP-8, TDFN-8 |
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EMA2004 |
2.7W Mono Fully Differential |
2.7 (4ohm, 5V, 10%THD+N) |
0.007 (0.6W, 8ohm, 1KHz, 3.6V) |
70 |
2.5 |
5.5 |
0.1 |
N/A |
MSOP-8, TDFN-8 |
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EMA2901 |
2.5W Mono |
2.5 (4ohm, 5V, 10%THD+N) |
0.05 (1W, 4ohm, 1KHz) |
60 |
2.5 |
5.5 |
0.1 |
N/A |
WL-CSP | |
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