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PDF ETK4992 Data sheet ( Hoja de datos )
| Número de pieza | ETK4992 | |
| Descripción | 1.25 Watt Fully Differential Audio Power Amplifier | |
| Fabricantes | Etek Microelectronics | |
| Logotipo |  |
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Etek
Microelectronics
ETK4992
1.25 Watt Fully Differential Audio Power Amplifier
General Description
The ETK4992 is a fully differential audio power amplifier designed for portable communication device
applications. It is capable of delivering 1.25 watt of continuous average power to an 8Ω BTL load with less than
1% distortion (THD+N) from a 5V battery voltage. It operates from 2.2 to 5.5V.
Features like 90dB PSRR at 217Hz, improved RF-rectification immunity, the space-saving 8-bump WLCSP
package, the advanced pop & click circuitry, a minimal count of external components and low-power shutdown
mode make ETK4992 ideal for wireless handsets.
The ETK4992 is unity-gain stable, and the gain can be configured by external resistors.
Features
z Fully differential amplifier
z Improved PSRR at 217Hz (VDD>3.0V)
90dB (typ)
z Power output at 5.0V & 1% THD&8Ω
1.25W (typ)
z Power output at 5.0V & 1% THD&4Ω
2.25W (typ)
z Power output at 4.2V & 1% THD&8Ω
0.92W (typ)
z Power output at 4.2V & 1% THD&4Ω
1.56W (typ)
z Power output at 3.6V & 1% THD&8Ω
0.7W (typ)
z Power output at 3.6V & 1% THD&4Ω
1.1W (typ)
z Ultra low shutdown current
0.01μA (typ)
z Improved pop & click circuitry eliminates noises during turn-on and turn-off transitions
z Thermal overload protection circuitry
z No output coupling capacitors, bootstrap capacitors required
z Unity-gain stable
z External gain configuration capability
z Available in space-saving package: 8-bump WLCSP
Applications
z Wireless handsets
z Portable electronic devices
z PDAs, Handheld computers
Rev 2.1 2010-02-05
1/11
1 page  
ETK4992
Absolute Maximum Ratings(note1)
Characteristic
Supply Voltage
Input Voltage
Storage Temperature
Power Dissipation(note2)
Symbol
VDD
VIN
TOPR
Range
0.3～6
-0.3～VDD+0.3
-65～+150
Internally Limited
Unit
V
V
℃
ESD Parameters:
ESD Protection(HBM)
2000
V
ESD Protection(MM)
200 V
Junction Temperature
Thermal Resistance
TJ
-40～150
℃
θJA 220 ℃/W
Note1: Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute
maximum rated conditions for extended periods may affect device reliability.
Note2: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX,θJA,
and the ambient temperature TA. The maximum allowable power dissipation is PDMAX=(TJMAX-TA)/ θ JA or the
number given in Absolute Maximum Ratings, whichever is lower.
Electrical Characteristics
The following specifications apply for the circuit shown in Figure 1, unless otherwise specified. Limits apply
for TA = 25℃.
VDD=5V
Parameter
Symbol Min. Typ. Max. Unit
Test Condition
Quiescent Power
Supply Current
Shutdown Current
IDD
ISD
Output Power
PO
Total Harmonic THD＋
Distortion + Noise
N
1.6 4 mA
1.6 4
VIN＝0V，no Load
VIN＝0V，RL＝8Ω
0.01 1 µA
VSHUTDOWN＝GND
1.25 W THD＝1％(max)，f=1kHz, RL＝8Ω
2.25 THD＝1％(max)，f=1kHz, RL＝4Ω
0.02 ％ f=1kHz，Po＝0.6Wrms,RL＝8Ω
Wake-up Time
TWU
170
ms
CB=1uF
Vripple=200mV sine p-p
Power Supply
Rejection Ratio
PSRR
-90
-85
f=217Hz（note1）
dB f=1KHz(note1)
-85 f=217Hz（note2）
-85 f=1KHz(note2)
Common Mode
Rejection Ratio
CMRR
-80
dB f=217Hz,VCM=200mVpp
Output Offset
VOS
2 8 mV
VIN=0V
Rev 2.1 2010-02-05
5/11
5 Page 
ETK4992
Figure19.Open Loop Frequency Response
Package Dimension
WLCSP8
Figure20.Closed Loop Frequency Response
1.45 TYP
1.0 MAX
C
B
0.25～0.35
0.15～0.25
0.05 M
Side View
Seating Plane
0.08
0.25～0.35
A
1 23
0.5
1.0 TYP
Umit: mm
Bottom View
Figure 21. Package Dimension
11/11
Rev 2.1 2010-02-05
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet ETK4992.PDF ] | |
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