Power Amplifier. LN4990 Datasheet

LN4990 Amplifier. Datasheet pdf. Equivalent


natlinear LN4990
LN4990
2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level
General Description
The LN4990 is an audio power amplifier primarily designed
for demanding applications in mobile phones and other
portable communication device applications. It is capable
of delivering 1.25 watts of continuous average power to an
8Ω BTL load and 2 watts of continuous average power (LD
and MH only) to a 4Ω BTL load with less than 1% distortion
(THD+N) from a 5VDC power supply. Boomer audio power
amplifiers were designed specifically to provide high quality
output power with a minimal amount of external
components. The LN4990 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 LN4990 features a low-power consumption shutdown
mode. To facilitate this, Shutdown may be enabled by
either logic high or low depending on mode selection.
Driving the shutdown mode pin either high or low enables
the shutdown pin to be driven in a likewise manner to
enable shutdown.
The LN4990 contains advanced pop & click circuitry which
eliminates noise which would otherwise occur during
turn-on and turn-off transitions. The LN4990 is unity-gain
stable and can be configured by external gain-setting
resistors.
Key Specifications
PSRR@fIN=217HVDD=5V
62dB(TYP)
Power Output@VDD=5V&1%THD 4Ω
2W(TYP)
Power Output@VDD=5V&1%THD 8Ω 1.25W(TYP)
Power Output@VDD=3V&1%THD 4Ω 600mW(TYP)
Power Output@VDD=3V&1%THD 8Ω 425W(TYP)
Shutdown Current 0.1μA(TYP)
Features
Available in space-saving packages: WSCPMSOP
Ultra low current shutdown mode
Improved pop & click circuitry eliminates noise during
Turn-on and turn-off transitions
2.2 - 5.5V operation
No output coupling capacitors, snubber networks or
bootstrap capacitors required
Unity-gain stable
External gain configuration capability
User selectable shutdown high or low logic Level
Applications
Mobile Phones
PDAs
Portable electronic devices
Package
WCSP
MSOP-8
Ordering Information
Ordering Number
LN4990ITL
LN4990MM
Package
WCSP
MSOP-8
Mark
XYD2
XXXX
Operating Ratings
Temperature Range
TMIN ≤ TA ≤ TMAX----------------------------------------------------------------------------------------------------- −40°C ≤ TA ≤ 85°C
Supply Voltage ------------------------------------------------------------------------------------------------------------ 2.2V ≤ VDD ≤ 5.5V
Rev.1.0 Dec.13, 2012
1
www.natlinear.com


LN4990 Datasheet
Recommendation LN4990 Datasheet
Part LN4990
Description 2 Watt Audio Power Amplifier
Feature LN4990; LN4990 2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level ■ General Description The .
Manufacture natlinear
Datasheet
Download LN4990 Datasheet




natlinear LN4990
Pin Configuration
VO1
-IN A
+IN
GND B
Bypass C
GND
VDD
Shutdown
1 23
VO2
(Top-View)
Ordering NumberLN4990ITL
SHUTDOWN 1
BYPASS 2
+IN 3
-IN 4
8 VO2
7 GND
6 VDD
5 VO1
MSOP-8
(Top View)
Ordering NumberLN4990MM
LN4990
XY
D2
XY-------Product Lot Number
D2-------LN4990ITL
MSOP Marking
LN4990
XXXX
Pin 1
XXXX------- Product Lot Number
Rev.1.0 Dec.13, 2012
2
www.natlinear.com



natlinear LN4990
Function Block Diagram
LN4990
Absolute Maximum Ratings
Parameter
Supply Voltage
Input Voltage
Operation Temperature
Storage Temperature
ESD Susceptibility
Symbol
VDD
VIN
Topr
Tstg
-
Value
-0.3—6.0
-0.3—VDD+0.3
-40—85
-65—150
4000
Unit
V
V
V
Rev.1.0 Dec.13, 2012
3
www.natlinear.com





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