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Power Amplifier. EMA2901 Datasheet |
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ESMT/EMP
EMA2901
2.5W Mono Audio Power Amplifier
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)
Po at 5.0V-4 ohm & 1% THD
Po at 2.6V-4 ohm & 1% THD
Shutdown Current
60dB(typ.)
1.8W(typ.)
500mW(typ.)
< 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
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Publication Date : Aug. 2009
Revision : 2.1
1/14
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ESMT/EMP
Connection Diagram
WL-CSP Package
EMA2901
Remark: (Unit: μm)
35±15 380±25
235±20
Order, Mark & Packing Information
Package
Marking
WL-CSP
Order information
EMA2901-50WL09GRR/NRR
50 5.0V Operation
WL09 WL_CSP Package
GRR RoHS (Pb Free)
Rating: -40 to 85°C
Package in Tape & Reel
NRR RoHS & Halogen free (By Request)
Rating: -40 to 85°C
Package in Tape & Reel
Product ID
Packing
EMA2901-50WL09GRR
3K units Tape & Reel
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Publication Date : Aug. 2009
Revision : 2.1
2/14
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ESMT/EMP
Typical Application
EMA2901
FIGURE 1. Typical Audio Amplifier Application Circuit
Elite Semiconductor Memory Technology Inc./Elite MicroPower Inc.
Publication Date : Aug. 2009
Revision : 2.1
3/14
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