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发布者:微桥 发布时间:2011-10-21 阅读:4403次    关键字: 音频功放
EMA2204-2.7W/Ch Stereo Audio Power Amplifier


EMA2204-2.7W/Ch Stereo Fully Differential Audio Power Amplifier with Bypass Capacitor Free DataSheet 

General Description
    The EMA2204 is a 2.7W/Ch Stereo fully differential amplifier designed to drive a speaker with at least 4Ω impedance. The device operates from 2.2 V to 5.5 V, drawing 9mA(Typ.) of quiescent supply current. The EMA2204 performs superior THD+N and PSRR with no bypass capacitor required.
    With no bypass capacitor, the EMA2204 is ideal for PMPs applications due to features such as -65dB supply voltage rejection from 20 Hz to 10kHz, improved RF rectification immunity and a fast startup with minimal pop.

Features
.2.7 W/Ch Into 4Ω From a 5-V Supply at THD = 10% (Typ)
.Low Supply Current: 9mA (Typ) at 5 V
.Shutdown Current: 0.1 μA (Typ)
.Fast Startup With Minimal Pop
.Improved PSRR (-65 dB) and Wide Supply Voltage (2.2
V to 5.5 V) for Direct Battery Operation
.Fully Differential Design Reduces RF Rectification
.-63 dB CMRR Eliminates Two Input Coupling Capacitors
.Available in 3 mm X 3 mm TDFN Package

Applications
. PMPs
. Desktop
. Notebook

ESMT_EMP 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

EMA1201

 2W Stereo with Shutdown Mode

 2 (4ohm, 5V, 10%THD+N)

 0.03 (0.25W, 8ohm, 1KHz)

 60

 2.5

 5.5

 0.1

 N/A

 TQFN-16

EMA2202

 2.4W Stereo with DC Vol Control and Selectable Gain

 3 (3ohm, 5V, 10%THD+N)

 0.3 (1W, 8ohm, 1KHz)

 60

 2.7

 5.5

 0.1

 Yes

 TSSOP-28FD

EMA2203

 2.4W Stereo with DC Vol Control and Headphone

 3 (3ohm, 5V, 10%THD+N)

 0.3 (1W, 8ohm, 1KHz)

 60

 2.7

 5.5

 0.1

 Yes

 TSSOP-20FD

EMA2204

 2.7W Stereo Fully Differential

 2.7 (4ohm, 5V, 10%THD+N)

 0.01 (0.25W, 8ohm, 1KHz, 3.6V)

 65

 2.2

 5.5

 0.1

 N/A

 TSSOP-20FD, TQFN-20

EMA2217

 2W Stereo with 4 Selectable Gain Setting

 2.45 (4ohm, 5V, 10%THD+N)

 0.06 (1.5W, 4ohm, 1KHz)

 75

 2.5

 5.5

 0.1

 N/A

 TSSOP-20FD

EMA1286/1288

 2W Stereo Audio Power Amplifier with Headphone Sense

 2(4ohm, 5V, 10%THD+N)

 0.15(0.25W, 8ohm, 1KHz)

 60

 2.5

 5.5

 0.1

 Yes (up to 225mW)

 TQFN-16

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