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发布者:微桥 发布时间:2011/10/12 阅读:9048次    关键字: Audio Power Amplifier
EMA1901-1.25W Mono Audio Power Amplifier


EMA1901-1.25W Mono Audio Power Amplifier DataSheet 

General Description
    The EMA1901 is an audio power amplifier primarily designed for portable communication applications such as mobile phones and portable multimedia players (PMP). To an 8Ω BTL load, it can deliver 1.25 watt of continuous average power with less than 1% distortion (THD+N) from a 5VDC supply. Typical THD+N is about 0.015% at 1Watt.
    The EMA1901 is pin-compatible to National Semi’s LM4890 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 EMA1901 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 EMA1901 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.)
􀂄 Power Output at 5.0V & 1% THD 1.25W(typ.)
􀂄 Power Output at 2.6V & 1% THD 300mW(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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