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发布者:微桥 发布时间:2011-7-30 阅读:3816次    关键字: EMA1002 ESMT EMP
EMA1002-1W Mono Audio Power Amplifier Headphone


EMA1002-1W Mono Audio Power Amplifier with Headphone Sense DataSheet

General Description
    The EMA1002 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 watt of continuous average power with less than 1% distortion (THD+N) from a 5VDC supply.
    The EMA1002 is pin-compatible to National Semi’s LM4890 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 EMA1002 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 EMA1001 is unity-gain stable and can be configured by external gain-setting resistors

Key Specifications
􀂄 PSRR at 217Hz, VDD = 5V (Fig. 1) 60dB(typ.)
􀂄 Power Output at 5.0V & 1% THD 1W(typ.)
􀂄 Power Output at 2.6V & 1% THD 250mW(typ.)
􀂄 Shutdown Current 0.1μA(typ.)

Features
􀂄 Available in space-saving MSOP package
􀂄 Ultra low current shutdown mode
􀂄 BTL output driving capacitive loads
􀂄 Improved pop & click circuitry eliminating noises during turn-on and turn-off    transitions
􀂄 2.2 - 5.5V operation
􀂄 No output coupling capacitors, snubber networks or bootstrap capacitors required
􀂄 Thermal shutdown protection
􀂄 Unity-gain stable
􀂄 External gain configuration capability
􀂄 Headphone amplifier mode

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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