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Part Name(s) : PT2337 PT2337-LQ PT2337-LQL PTC
Princeton Technology
Description : Stereo 2W Class-D Amplifier With Built-In Audio Processor View

DESCRIPTION

The PT2337 is an integrated Audio Amplifier design for the low voltage (5V) application purpose, built-in

Stereo 2W Class-D power Amplifier with Audio processor, it provides 4 Stereo sources selector, and all signal process is based on pure analog processing to maintain high performances and low power consumption.



FEATURES

• Supply voltage: 3 ~ 6V

• 2W X 2 Class-D power Amplifier (VDD=5V, RL=4Ω)

• 4 Stereo inputs

• 32 steps, independent channel volume controller

• Bass and treble control.

• 2 voltage gain setting for power amp, (20dB, 26dB)

• Pop-Free circuitry eliminates unpleasant noises during power ON/OFF.

• Low power shutdown

•High PSRR

• High RF radiation immunity.

• Over heat/over current protection

• Controlled by I2C interface

•Pin-compatible with PT2334 (Partly functions compatible)

• LQFP 48 pins package



APPLICATIONS

• Portable player duck speaker system

• Portable media player

• Digital photo frame

• Flat panel display and TV

• Other Audio applications


Part Name(s) : LM4863 LM4863LQ LM4863LQ/NOPB L4863 TI
Texas Instruments
Description : Dual 2.2W Audio Amplifier Plus Stereo Headphone Function View

DESCRIPTION
The LM4863 is a dual bridge-connected Audio power Amplifier which, when connected to a 5V supply, will deliver 2.2W to a 4Ω load or 2.5W to a 3Ω load with less than 1.0% THD+N (see Notes below). In addition, the headphone input pin allows the Amplifiers to operate in single-ended mode when driving Stereo headphones.
Boomer Audio power Amplifiers were designed
specifically to provide high quality output power from a surface mount package while requiring few external components. To simplify Audio system design, the LM4863 combines dual bridge speaker Amplifiers and Stereo headphone Amplifiers on one chip.
The LM4863 features an externally controlled, low-power consumption shutdown mode, a Stereo headphone Amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce “clicks and pops” during device turn-on.

FEATURES
Stereo Headphone Amplifier Mode
• “Click and Pop” Suppression Circuitry
• Unity-Gain Stable
• Thermal Shutdown Protection Circuitry
• SOIC, TSSOP, exposed-DAP TSSOP, and
   WQFN packages

KEY SPECIFICATIONS
• PO at 1% THD+N
   – LM4863LQ, 3Ω, 4Ω loads: 2.5W(typ),
      2.2W(typ)
   – LM4863MTE, 3Ω, 4Ω loads: 2.5W(typ),
      2.2W(typ)
   – LM4863MTE, 8Ω load: 1.1W(typ)
   – LM4863, 8Ω: 1.1W(typ)
• Single-ended mode THD+N at 75mW into 32Ω:
   0.5%(max)
• Shutdown current: 0.7μA(typ)
• Supply voltage range: 2.0V to 5.5V

APPLICATIONS
• Multimedia Monitors
• Portable and Desktop Computers
• Portable Televisions

Part Name(s) : TS4985 TS4985EIJT TS4985EKIJT ST-Microelectronics
STMicroelectronics
Description : 2 X 1.2W Stereo Audio Power Amplifier with Dedicated Standby Pins View

Description

The TS4985 has been designed for top-class Stereo Audio applications. Thanks to its compact and power-dissipation efficient flip-chip package, it suits various applications.

With a BTL configuration, this Audio power Amplifier is capable of delivering 1.2W per channel of continuous RMS output power into an 8Ω load @ 5V.

Each output channel (left and right), has an external controlled standby mode pin (STDBYL & STDBYR) to reduce the supply current to less than 10nA per channel. The device also features an internal thermal shutdown protection.

The gain of each channel can be configured by external gain setting resistors.



■ Operating from VCC=2.2V to 5.5V

■ 1.2W output power per channel @ VCC=5V, THD+N=1%, RL=8Ω

■ 10nA standby current

■ 62dB PSRR @ 217Hz with grounded inputs

■ High SNR: 106dB(A) typ.

■ Near zero pop & click

■ Lead-free 15 bumps, flip-chip package



Applications

■ Cellular mobile phones

■ Notebook & PDA computers

■ LCD monitors & TVs

■ Portable Audio devices



 


Part Name(s) : LM4863G-D16-T LM4863G-N20-R LM4863G-S18-R UTC
Unisonic Technologies
Description : DUAL 2.2W Audio Amplifier PLUS Stereo HEADPHONE FUNCTION View

■ DESCRIPTION
The UTC LM4863 is a dual bridge-connected Audio power Amplifier. It combines dual bridge speaker Amplifiers and Stereo headphone Amplifiers on one chip to simplify Audio system design. In addition, the headphone input pin allows the Amplifiers to operate in single-ended mode when driving Stereo headphones.
The IC could deliver different power by packages as below (when connected to a 5V supply with less than 1.0% THD+N.):

   - HTSSOP-20, 4Ω load: 2.2W
   - HTSSOP-20, 3Ω load: 2.5W(with forced-air cooled)
   - SOP/DIP , 8Ω load: 1.1W.

The UTC LM4863 features an externally controlled, low-power consumption shutdown mode, a Stereo headphone Amplifier mode, and thermal shutdown protection. It also utilizes circuitry to reduce “clicks and pops” during device turn-on.

■ FEATURES
* “Click and pop” suppression circuitry
* Thermal shutdown protection circuitry
* Unity-gain stable
* Stereo headphone Amplifier mode


Part Name(s) : PT2335 PT2335-L PT2335-LQ PTC
Princeton Technology
Description : 2W X 2 Stereo Integrated Audio Amplifier View

DESCRIPTION

The PT2335 is an integrated Audio Amplifier design for the low voltage (5V) application purpose, built-in Stereo 2W Class-D power Amplifier with Audio processor, it provides 4 Stereo sources selector, and all signal process is based on pure analog processing to maintain high performances and low power consumption. The Audio processor includes all the advanced control functions such like digital controlled volume, adaptive loudness, treble and bass control. It also provides line output for versatile application. The whole chip functions are controlled via I2C bus.



FEATURES

• Supply voltage: 3 ~ 6V

• 4 Stereo inputs

• Input gain selectable (0dB, 3.75dB, 7.5dB, 11.25dB)

• Independent channel volume controller

• Loudness function

• Bass and treble control.

• 2W X 2 Class-D power Amplifier (VDD=5V, RL=4Ω)

• 2 voltage gain setting for power amp (20dB, 26dB)

• Internal and external oscillator selectable

• Dual switching frequency for avoid AM radio interference

• Pop-Free circuitry eliminates unpleasant noises during power ON/OFF.

• Low power shutdown

• High PSRR

• Over heat/over current protection circuitry

• Controlled by I2C interface

• High power CMOS processing

• LQFP 48 pins package



APPLICATIONS

• Portable player duck speaker system

• Portable media player

• Digital photo frame

• Flat panel display and TV

• Other Audio applications



 


Part Name(s) : LM4843MH LM4843MHX LM4843 National-Semiconductor
National ->Texas Instruments
Description : Stereo 2W Audio Power Amplifiers with DC Volume Control View

General Description
The LM4843 is a monolithic integrated circuit that provides DC volume control, and Stereo bridged Audio power Amplifiers capable of producing 2W into 4Ω (Note 1) with less than 1.0% THD or 2.2W into 3Ω (Note 2) with less than 1.0% THD.
Boomer® Audio integrated circuits were designed specifically to provide high quality Audio while requiring a minimum amount of external components. The LM4843 incorporates a DC volume control with Stereo bridged Audio power Amplifiers making it optimally suited for multimedia monitors, portable radios, desktop, and portable computer applications.
The LM4843 features an externally controlled, low-power consumption shutdown mode, and both a power Amplifier and headphone mute for maximum system flexibility and performance.


Features
■ Acoustically Enhanced DC Volume Control Taper
Stereo bridged power Amplifiers
■ “Click and pop” suppression circuitry
■ Thermal shutdown protection circuitry

Applications
■ Portable and Desktop Computers
■ Multimedia Monitors
■ Portable Radios, PDAs, and Portable TVs

Part Name(s) : LM4863 LM4863LQ LM4863LQX LM4863M LM4863MT LM4863MTX LM4863MX LM4863N LM4863MTE National-Semiconductor
National ->Texas Instruments
Description : Dual 2.2W Audio Amplifier Plus Stereo Headphone Function View

General Description
The LM4863 is a dual bridge-connected Audio power Amplifier which, when connected to a 5V supply, will deliver 2.2W to a 4Ω load (Note 1) or 2.5W to a 3Ω load (Note 2) with less than 1.0% THD+N. In addition, the headphone input pin allows the Amplifiers to operate in single-ended mode when driving Stereo headphones.
   
Features
Stereo headphone Amplifier mode
■ “Click and pop” suppression circuitry
■ Unity-gain stable
■ Thermal shutdown protection circuitry
■ SOIC, DIP*, TSSOP and exposed-DAP TSSOP, and LLP
    packages
   
Applications
■ Multimedia monitors
■ Portable and desktop computers
■ Portable televisions
   

Part Name(s) : LM4780 LM4780TA National-Semiconductor
National ->Texas Instruments
Description : Overture™ Audio Power Amplifier Series Stereo 60W, Mono 120W Audio Power Amplifier with Mute View

General Description

The LM4780 is a Stereo Audio Amplifier capable of typically delivering 60W per channel of continuous average output power into an 8Ω load with less than 0.5% THD+N from 20Hz - 20kHz.



Features

■ SPiKe Protection

■ Low external component count

■ Quiet fade-in/out mute mode

■ Wide supply range: 20V - 84V

■ Signal-to-Noise Ratio ≥ 97dB (ref. to PO = 1W)



Applications

Audio Amplifier for component Stereo

Audio Amplifier for compact Stereo

Audio Amplifier for self-powered speakers

Audio Amplifier for high-end and HD TVs


Part Name(s) : PT2334 PT2334-LQ PTC
Princeton Technology
Description : Stereo 2W Class-D Amplifier with Built-In Audio Processor View

DESCRIPTION

The PT2334 is an integrated Stereo 2W Class-D Amplifier accompany with a Class-AB headphone

driver. The input interface accepts both analog and digital Audio sources; the chip included a 16-bit DAC to convert digital Audio source to analog signal. The signal process is basically in analog domain to maintain the high performances and low power consumption. The PT2334 alsoprovide very useful multi-sources selection (Up to 4 sources) and tone control functions, thanks for the advanced CMOS technology now we could combine both Audio processing and amplification into a single chip. The whole chip functions are controlled via I2C bus.



FEATURES

• Supply Voltage: 3.7~6V

• Differential input power Amplifier for improved CMRR.

• 2W X 2 Class-D power Amplifier (VDD=5V, RL=4Ω)

• 70mW X 2 Class-AB headphone driver (RL=32Ω)

• BASS and TREBLE control

• 32 steps volume controller

• 4 Inputs selection

Audio line out (same level with volume and tone)

• Built-In 16 bits DAC for digital Audio sources

• Pop-Free circuitry eliminates unpleasant noises during power ON/OFF.

• Low power shutdown

• Over Heat/Over current protection circuitry

• Controlled by I2C interface

• High Power CMOS processing

• Available in 48 Pins, LQFP



APPLICATIONS

• Flat panel display and TV

• Portable media player

• Portable player ducking system

• Digital photo frame

• Other Audio applications


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