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LM4961 bảng dữ liệu(PDF) 1 Page - Texas Instruments

tên linh kiện LM4961
Giải thích chi tiết về linh kiện  Ceramic Speaker Driver
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nhà sản xuất  TI1 [Texas Instruments]
Trang chủ  http://www.ti.com
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LM4961 bảng dữ liệu(HTML) 1 Page - Texas Instruments

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SW-OUT
Bypass
Shutdown 2
VDD
NC
Shutdown 1
GND
BW2
BW1
Band-SW
VIN
CCHG
NC
NC
LM4961, LM4961LQBD
www.ti.com
SNAS242J – AUGUST 2004 – REVISED MARCH 2007
LM4961
Ceramic Speaker Driver
Check for Samples: LM4961, LM4961LQBD
1
FEATURES
DESCRIPTION
The LM4961 is an audio power amplifier primarily
2
Click and Pop Circuitry Eliminates Noise
designed for driving Ceramic Speaker for applications
During Turn-On and Turn-Off Transitions
in Cell Phone and PDAs. It integrates a boost
Low Current Shutdown Mode
converter, with variable output voltage, with an audio
Low Quiescent Current
power amplifier. It is capable of driving 15Vp-p in BTL
mode to 2uF+ 30 ohms load, continuous average
Mono 15Vp-p BTL Output, RL = 2μF+30Ω, f =
power, with less than 1% distortion (THD+N) from a
1kHz
3.2VDC power supply.
Thermal Shutdown Protection
Boomer
audio
power
amplifiers
were
designed
Unity-Gain Stable
specifically to provide high quality output power with a
External Gain Configuration Capability
minimal
number
of
external
components.
The
LM4961 does not require bootstrap capacitors, or
Including Band Exchange SW
snubber circuits therefore it is ideally suited for
Including Leakage Cut SW
portable applications requiring high voltage output to
drive capacitive loads like Ceramic Speakers. The
APPLICATIONS
LM4961 features a low-power consumption shutdown
mode. Additionally, the LM4961 features an internal
Cellphone
thermal shutdown protection mechanism.
PDA
The LM4961 contains advanced pop & click circuitry
KEY SPECIFICATIONS
that eliminates noises which would otherwise occur
during turn-on and turn-off transitions.
Quiescent Power Supply Current: 7mA (typ)
The
LM4961
is
unity-gain
stable
and
can
be
Voltage Swing in BTL at 1% THD: 15Vp-p (typ)
configured by external gain-setting resistors.
Shutdown current: 0.1
μA (typ)
Connection Diagram
Figure 1. LM4961LQ (5x5) (Top View)
See Package Number NJB0028A
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2007, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.


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