ECL4890|Low-Cost, Mono/Stereo, 1 W Differential Audio Power Amplifiers


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ECL4890

Low-Cost, Mono/Stereo, 1 W Differential Audio Power Amplifiers

 

General Description

The​​ ELN4890 is an audio power amplifier primarily designed ​​​​ for ​​ demanding ​​ applications ​​ in ​​ mobile ​​ phones ​​ and ​​ other ​​​​ portable ​​ communication ​​ device ​​ applications. ​​ It ​​ is ​​ capable ​​​​ of delivering 1 watt of continuous average power to an 8Ω ​​​​ BTL load with less than 1% distortion (THD+N) from a 5V​​ DC ​​ power ​​ supply. ​​ Boomer ​​ audio ​​ power ​​ amplifiers ​​ were ​​​​ designed ​​ specifically ​​ to ​​ provide ​​ high ​​ quality ​​ output ​​ power ​​​​ with  ​​​​ a  ​​​​ minimal  ​​​​ amount  ​​​​ of  ​​​​ external  ​​​​ components.  ​​​​ The​​ ELN4890 ​​ does ​​ not ​​ require ​​ output ​​ coupling ​​ capacitors ​​ or​​ bootstrap ​​ capacitors, ​​ and ​​ therefore ​​ is ​​ ideally ​​ suited ​​ for​​ mobile ​​ phone ​​ and ​​ other ​​ low ​​ voltage ​​ applications ​​ where​​ minimal power consumption is a primary requirement.​​ The​​ ELN4890 features a low-power consumption shutdown​​ mode, which is achieved by driving the shutdown pin with​​ logic ​​ low. ​​ Additionally, ​​ the​​ ELN4890 ​​ features ​​ an ​​ internal​​ thermal  ​​​​ shutdown  ​​​​ protection  ​​​​ mechanism.  ​​​​ The  ​​​​ ELN4890 ​​​​ contains ​​ advanced ​​ pop ​​ & ​​ click ​​ circuitry ​​ which ​​ eliminates

noises ​​ which ​​ would ​​ otherwise ​​ occur ​​ during ​​ turn-on ​​ and ​​​​ turn-off ​​ transitions. ​​ The ​​ ELN4890 ​​ is ​​ unity-gain ​​ stable ​​ and ​​​​ can be configured by external gain-setting resistors.

 

Features

Available in space-saving packages

Ultra low current shutdown mode

BTL output can drive capacitive loads

Improved  ​​​​ pop  ​​​​ &  ​​​​ click  ​​​​ circuitry  ​​​​ eliminates  ​​​​ noises​​ during turn-on and turn-off transitions

2.2 - 5.0V 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

Portable electronic devices

 

Key Specifications

PSRR​​ @fIN​​ =217Hz, VDD = 5V ​​​​ 62dB(typ.)

Power Output​​ @VDD= 5.0V &1% THD ​​ ​​ ​​ ​​​​ 1W(typ.)

 

Pin Configuration

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ordering/​​ Marking​​ Information

 

ECL4890​​ N​​ ​​ XX​​ ​​ R

RTape & Reel

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​  ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ ​​  ​​​​ Package Type

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​  ​​​​ M1SOP8

 ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​ ​​​​ R1MSOP8

 

N

A

When the input is greater than 5.2V IC will automatically shut down

C

No high voltage automatic closing function

D

No high voltage automatic closing function, and under the high pressure,​​ the gain will be automatically reduced to 1 times

 

Part No.

Marking

information

ECL4890NM1R

LN4890

XXXX

XXXXDate Code

ECL4890NR1R

 

Operating Ratings

Temperature Range

TMIN ≤ TA ≤ TMAX-----------------------------------------------------------------------------------------------​​ -40°C ≤ TA ≤ 85°C

Supply Voltage ---------------------------------------------------------------------------------------------------- 2.2V ≤ VDD ≤ 5.0V

 

Pin Function Description

Pin Number

Pin Name

Function Description

1

SHUTDOWN

Chip Enable (Low Effective)

2

BYPASS

Bypass Capacitance Input Pin

3

+IN

Positive Input Terminal (Differential +)

4

-IN

Negative Input Terminal (Differential -)

5

VO1

Negative Output Terminal (Differential -)

6

VDD

Power Supply

7

GND

Ground Pin

8

VO2

Positive Output Terminal (Differential +)

 

 

 

 

 

 

 

 

 

 

 

 

 

Typical Application Circuit

 

 

 

 

 

 

 

 

 

 

 

 

 

Absolute Maximum Ratings

Parameter

Symbol

Value

Unit

Supply Voltage

VDD

-0.3—5.0

V

Input Voltage

VIN

-0.3—VDD+0.3

V

Operation Temperature

Topr

-40—85

Storage Temperature

Tstg

-65—150

ESD Susceptibility

-

2000

V

 

Function Block Diagram

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Electrical Characteristics

(VDD = 5V Unless otherwise specified. Limits apply for TA = 25°C.)

Parameter

Symbol

Condition

Min

Typ

Max

Unit

IDD

Quiescent Power

Supply Current

VIN = 0V, Io = 0A, No Load

4

8

mA

VIN = 0V, Io = 0A,  Load

5

10

mA

ISD

Shutdown Current

VSHUTDOWN = 0V

0.1

2

μA

VSDIH

Shutdown Voltage

Input High

 

1.2

V

VSDIL

Shutdown Voltage

Input Low

 

0.4

V

VOS

Output Offset Voltage

 

7

50

mV

ROUT-GND

Resistor Output

to GND

 

7.0

8.5

9.7

PO

Output Power ( 8Ω )

THD = 2% (max);

f = 1 kHz    8Ω Load

0.8

1.0

W

TWU

Wake-up time

 

170

220

ms

TSD

Thermal Shutdown

Temperature

 

150

170

190

THD+N

Total Harmonic

Distortion+Noise

Po = 0.4 Wrms; f = 1kHz

0.1

%

PSRR

Power Supply

Rejection Ratio

Vripple = 200mV  sine  p-p

f=217Hz

55

62

dB

Vripple = 200mV  sine  p-p

f=1kHz

66

TSDT

Shut Down Time

 Load

1.0

ms

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(VDD = 3V Unless otherwise specified. Limits apply for TA = 25°C.)

Parameter

Symbol

Condition

Min

Typ

Max

Unit

IDD

Quiescent Power

Supply Current

VIN = 0V, Io = 0A, No Load

3.5

7

mA

VIN = 0V, Io = 0A,  Load

4.5

9

mA

ISD

Shutdown Current

VSHUTDOWN = 0V

0.1

2

μA

VSDIH

Shutdown Voltage Input High

 

1.2

V

VSDIL

Shutdown Voltage Input Low

 

0.4

V

VOS

Output Ofsett Voltage

 

7

50

mV

ROUT-GND

Resistor Output​​ to GND

 

7.0

8.5

9.7

PO

Output Power (  )

THD = 2% (max); f = 1 kHz

8Ω Load

0.28

0.31

W

TWU

Wake-up time

 

170

220

ms

TSD

Thermal Shutdown Temperature

 

150

170

190

THD+N

Total Harmonic Distortion+Noise

Po = 0.4 Wrms; f = 1kHz

0.1

%

PSRR

Power Supply Rejection Ratio

Vripple = 200mV  sine  p-p

f=217Hz

45

56

dB

Vripple = 200mV  sine  p-p

f=1kHz

62

 

(VDD = 2.6V Unless otherwise specified. Limits apply for TA = 25°C.)

Parameter

Symbol

Condition

Min

Typ

Max

Unit

IDD

Quiescent Power

Supply Current

VIN = 0V, Io = 0A, No Load

2.6

5.5

mA

ISD

 

VSHUTDOWN = 0V

0.1

2

μA

PO

Output Power (  )

THD = 1% (max);f = 1 kHz

8Ω Load

 

0.2

W

 Load

0.22

THD+N

Total Harmonic Distortion+Noise

Po = 0.1 Wrms; f = 1kHz

0.08

%

PSRR

Power Supply Rejection Ratio

Vripple = 200mV  sine  p-p

f=217Hz

44

dB

Vripple = 200mV  sine  p-p

f=1kHz

44

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Typical Performance Characteristics