Datasheet.kr   

LM4910MM 데이터시트 PDF




National Semiconductor에서 제조한 전자 부품 LM4910MM은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 LM4910MM 자료 제공

부품번호 LM4910MM 기능
기능 Output Capacitor-less Stereo 35mW Headphone Amplifier
제조업체 National Semiconductor
로고 National Semiconductor 로고


LM4910MM 데이터시트 를 다운로드하여 반도체의 전기적 특성과 매개변수에 대해 알아보세요.




전체 22 페이지수

미리보기를 사용할 수 없습니다

LM4910MM 데이터시트, 핀배열, 회로
February 2003
LM4910
Output Capacitor-less Stereo 35mW Headphone
Amplifier
General Description
The LM4910 is an audio power amplifier primarily designed
for headphone applications in portable device applications. It
is capable of delivering 35mW of continuous average power
to a 32load with less than 1% distortion (THD+N) from a
3.3VDC power supply.
The LM4910 utilizes a new circuit topology that eliminates
output coupling capacitors and half-supply bypass capaci-
tors (patent pending). The LM4910 contains advanced pop &
click circuitry which eliminates noises caused by transients
that would otherwise occur during turn-on and turn-off.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components. Since the LM4910 does not require
any output coupling capacitors, half-supply bypass capaci-
tors, or bootstrap capacitors, it is ideally suited for low-power
portable applications where minimal space and power con-
sumption are primary requirements.
The LM4910 features a low-power consumption shutdown
mode, activated by driving the shutdown pin with logic low.
Additionally, the LM4910 features an internal thermal shut-
down protection mechanism. The LM4910 is also unity-gain
stable and can be configured by external gain-setting resis-
tors.
Key Specifications
n PSRR at f = 217Hz
65dB (typ)
n Power Output at VDD = 3.3V, RL = 32, and THD
1% 35mW (typ)
n Shutdown Current
0.1µA (typ)
Features
n Eliminates headphone amplifier output coupling
capacitors (patent pending)
n Eliminates half-supply bypass capacitor (patent pending)
n Advanced pop & click circuitry eliminates noises during
turn-on and turn-off
n Ultra-low current shutdown mode
n Unity-gain stable
n 2.2V - 5.5V operation
n Available in space-saving MSOP, LLP, and SOIC
packages
Applications
n Mobile Phones
n PDAs
n Portable eletronics devices
n Portable MP3 players
Typical Application
20030565
FIGURE 1. Typical Audio Amplifier Application Circuit
Boomer® is a registered trademark of National Semiconductor Corporation.
© 2003 National Semiconductor Corporation DS200305
www.national.com




LM4910MM pdf, 반도체, 판매, 대치품
Electrical Characteristics VDD = 2.6V (Notes 1, 2)
The following specifications apply for VDD = 2.6V, AV = 1, and 32load unless otherwise specified. Limits apply to TA = 25˚C.
Symbol
Parameter
Conditions
LM4910
Units
Typ Limit (Limits)
(Note 6) (Notes 7,
8)
IDD
ISD
VOS
PO
THD+N
Quiescent Power Supply Current
Standby Current
Output Offset Voltage
VIN = 0V, 32Load
VSHUTDOWN = GND
Output Power
THD = 1% (max); f = 1kHz
Total Harmonic Distortion + Noise PO = 10mWrms; f = 1kHz
3.0
0.1
5
13
0.3
55 (f =
mA (max)
µA (max)
mV (max)
mW
%
PSRR
Power Supply Rejection Ratio
VRIPPLE = 200mVp-p sinewave
Input terminated with 10to ground
217Hz)
55 (f =
dB
1kHz)
Note 1: All voltages are measured with respect to the GND pin unless otherwise specified.
Note 2: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is
functional but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which
guarantee specific performance limits. This assumes that the device is within the Operating Ratings. Specifications are not guaranteed for parameters where no limit
is given, however, the typical value is a good indication of device performance.
Note 3: 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)/ θJA or the number given in Absolute Maximum Ratings, whichever is lower. For the LM4910, see power derating
currents for more information.
Note 4: Human body model, 100pF discharged through a 1.5kresistor.
Note 5: Machine Model, 220pF-240pF discharged through all pins.
Note 6: Typicals are measured at 25˚C and represent the parametric norm.
Note 7: Limits are guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 8: Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
Note 9: If the product is in shutdown mode and VDD exceeds 6V (to a max of 8V VDD) then most of the excess current will flow through the ESD protection circuits.
If the source impedance limits the current to a max of 10ma then the part will be protected. If the part is enabled when VDD is above 6V circuit performance will be
curtailed or the part may be permanently damaged.
Note 10: Human body model, 100pF discharged through a 1.5kresistor, Pin 6 to ground.
External Components Description (Figure 1)
Components
1. RI
2. CI
3. Rf
4. CS
Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also forms a
high-pass filter with Ci at fc = 1/(2πRiCi).
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
high-pass filter with Ri at fc = 1/(2πRiCi). Refer to the section Proper Selection of External Components, for
an explanation of how to determine the value of Ci.
Feedback resistance which sets the closed-loop gain in conjunction with Ri.
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for information concerning proper placement and selection of the supply bypass capacitor.
www.national.com
4

4페이지










LM4910MM 전자부품, 판매, 대치품
Typical Performance Characteristics (Continued)
Output Power vs
Load Resistance
Output Power vs
Load Resistance
Output Power vs
Supply Voltage
20030523
Output Power vs
Supply Voltage
20030578
Output Power vs
Supply Voltage
20030579
20030580
Power Dissipation vs
Output Power
20030581
7
20030530
www.national.com

7페이지


구       성 총 22 페이지수
다운로드[ LM4910MM.PDF 데이터시트 ]

당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는

포괄적인 데이터시트를 제공합니다.


구매 문의
일반 IC 문의 : 샘플 및 소량 구매
-----------------------------------------------------------------------

IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한
광범위한 전력 반도체를 판매합니다.

전력 반도체 전문업체

상호 : 아이지 인터내셔날

사이트 방문 :     [ 홈페이지 ]     [ 블로그 1 ]     [ 블로그 2 ]



관련 데이터시트

부품번호상세설명 및 기능제조사
LM4910MA

Output Capacitor-less Stereo 35mW Headphone Amplifier

National Semiconductor
National Semiconductor
LM4910MM

Output Capacitor-less Stereo 35mW Headphone Amplifier

National Semiconductor
National Semiconductor

DataSheet.kr       |      2020   |     연락처      |     링크모음      |      검색     |      사이트맵