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发布者:微桥 发布时间:2011-10-14 阅读:4559次    关键字: 音频功放
EMA2901-2.5W Mono Audio Power Amplifier


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

Audio Power Amplifier > Class A/B

 

Part Number

Description

Po(Max output power, W)

Typical THD+N (%)

PSRR (dB)

Vin min(V)

Vin max(V)

Shutdown current (uA)

Earphone

Package

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

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

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)

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

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

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

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

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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