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下列提供您 UTC 音頻放大器 IC 介紹
放大器電路，或稱放大電路，能增加訊號的輸出功率。
它透過電源取得能量來源，以控制輸出訊號的波形與輸入訊號一致，但具有較大的振幅。
依此來講，放大器電路亦可視為可調節的輸出電源，用來獲得比輸入訊號更強的輸出訊號。

~ 功率放大器類型 ~
A類放大器
當對效率要求不高的時候，大多數小信號線性放大器會設計成甲類（A類），即輸出級元件總是處於導通區。
甲類（A類）放大器一般比其它類型線性度更好，也較為簡單，但效率非常低。這類放大器最常用於小信號級或低功率（例如驅動耳機）應用中。
A類放大器的缺點是輸出效率很低，理論值不超過百分之五十。
以驅動耳機為例，在一般情況下，音量越小，耗電越多，當機子在沒有信號輸入時，電流以最大的額度流動，所以在待機沒聽音樂時，卻是用電最快的時候；即使在聽音樂時，所用的電也有 50% 以熱量形式消耗掉。
所以，一台A類放大器的用電量，絕不亞於一台冷氣機，而此 50% 的消耗熱能，則是讓真空管逐漸老化的原因。
同時因為發熱量太大，所有零件長期工作於大電流、高溫下，容易引起穩定度和壽命方面的問題，假如是純A類真空管綜合擴大機，還有管子壽命及日後更換等問題。

B類放大器
在乙類（B類）中，有兩個（組）輸出元件分別放大正負半週，每一個都精確地在輸入信號的180度（或半周期）時交互導通。

B類推挽式放大器
甲乙類（AB類）放大器在甲類（A類）與乙類（B類）的一種折衷，它改善了小信號輸出的線性度;導通角在180度以上，具體值由設計者決定。
由於他們有較高的效率，通常用於低頻放大器（如音頻和hi-fi）中。或者也用於其它線性度和效率都很重要的設計（手機，蜂窩發射塔，電視發射台）。

C類放大器
常稱為高功率射頻（RF）放大器。丙類（C類）設計成在輸入信號不足180°時導通。
線性度不好，但是對於單個頻率功率放大器來說這並不重要。信號由調諧電路還原為近似正弦形狀，同時效率比甲類（A類）、甲乙類（AB類）或者乙類（B類）放大器都高很多。

D類放大器
丁類（D類）放大器使用快速開關（現代設計中多為數百KHz）來達到很高的功耗效率（在現代設計中大於90%），原理與交換式電源供應器相近。通過每個輸出元件元件導通或關斷，來輸出放大的類比訊號，
因此能量損失達到最小化；由於原始訊號是先被轉換成一系列的開關（1與0）指令，因此又被稱為數位擴大機。
像脈衝寬度調製這類簡單方法有時還在使用；然而，高性能的開關放大器使用數字技術，比如∑-Δ調製，來達到更高的性能。

早先由於有限的頻寬和相當大的失真（音質差），它們僅用於亞低音用擴音器。
半導體元件的進展已經使開發高保真、全聲音頻帶丁類（D類）放大器的開展成為可能，使得它們的信噪比（S/N）和失真度與其它線性元件的差距已經縮小。

由於PDM數位訊號也屬於PWM訊號，原始的數位音樂訊號可以藉由數學計算來轉換成同樣為數位訊號的PDM訊號、而由PDM訊號直接控制開關元件，
這樣子稱為數位直輸（也有稱為Power DAC及Sony的S-master）；D類擴大機被詬病的其中一點就是數位直輸的不成熟與不普及，
多數音響系統是先用數位類比轉換器將數位音樂轉換成類比音訊，然後D類擴大機再將類比音訊轉回PDM格式的數位訊號，兩次數位類比轉換會造成更大的失真。
 

產品總類	品名規格	廠牌	產品特色	流動庫存數量	汎翊網站查詢
350mW音源放大器與關機模式 IC	PA4819G-S08-R SOP-8	UTC	R=8Ω, 350mW / R=16Ω , 300mW	72,500	點選查看即時庫存
音頻放大器 IC	3544G-S08-R SOT-8	UTC	防止爆音功能	22,500	點選查看即時庫存
音源功率放大器 IC	TDA2003L-TB5-T  TO-220B	UTC	RL=2Ω , 輸出功率 10W	5,000	點選查看即時庫存
音源功率放大器 ( AB類 ) IC	MC34119G-S08-R SOP-8	UTC	RL=32Ω , 輸出功率 0.25W	2,500	點選查看即時庫存
音頻放大器 ( B類 )	TBA820ML-D08-T DIP-8	UTC	R=8Ω , 輸出功率 1.2W  , 寬工作電壓 : 3~14V	4,000	點選查看即時庫存
音源功率放大器 IC	1812AG-38-S08-R  SOP-8	UTC	單電源 :2.4~3.3V  , 內置包含控制電路 *1Hz-8Hz可編程LED閃光 , 輸出聲音可產生步槍、機槍、轟隆聲、門鈴、警報	37,500	點選查看即時庫存
18W HI-FI 音頻放大器 IC	TDA2030AL-TB5-T  TO-220B	UTC	VCC = 22V , IQ = 50mA , POUT = 18W , RL = 4Ω	70,000
32W HI-FI 音頻放大器 IC	TDA2050L-TB5-T TO-220B	UTC	R=8Ω , 輸出功率 32W		點選查看即時庫存
雙低壓功率放大器IC	TDA2822G-S08-R SOP-8	UTC	寬工作電壓 : 1.8V ~ 12V , 支援橋接或立體聲	12,500	點選查看即時庫存
單音發聲IC	MC34018G-S28-R  SOP-28	UTC	內置電壓調節器,背景噪音水平監測系統, 典型100mW 輸出（進入 25Ω）的功率音頻放大器 外接音量控制電路的音量控制功能	21,000	點選查看即時庫存
AM/FM 中頻處理  IC	TA7640APL-D16-T DIP-16	UTC	內建AM / FM 切換器	4,840	點選查看即時庫存

 

1.  Audio Amplifier
Single Channel Audio Power Amplifier （Class AB & Class B）
Part No.	Features	Function	Supply Voltage	VCC		Package
				Output Power (W)	THD
PA4819	0.35W Audio Power Amplifier with Shutdown Function *Output power at 10% THD+N Supply voltage:5V Delivering 350mWRMS into a 16Ω load Delivering 300mWRMS into a 8Ω load * With shutdown mode * Stable unity-gain.	Standby	2.0V~5.5V	5.0V		SOP-8
				Typ=0.35W(RL=16Ω)	10%
PA4871	1.1W Audio Power Amplifier with Shutdown Function * Output power at 0.5% THD+N Supply voltage:5V Delivering 1.1W into a 8Ω load * With shutdown mode * Stable unity-gain.	Standby	2.0V~5.5V	5.0V		SOP-8 MSOP-8 DFN3030-8
				Typ=1.1W(RL=8Ω)	0.5%
LM4862	0.5W Audio Power Amplifier with Shutdown Function * Stable Unity Gain * Gain Configuration can be set by External Components	Standby	2.0V~5.5V	5.0V		DIP-8 SOP-8
				Typ=0.5W(RL=8Ω)	1%
KA8602	Low Voltage Audio Power Amplifier 0.4W max *Wide operating supply voltage: VCC=2V~16V *Low quiescent supply current( ICC=2.7mA, typ) *Medium output power (POUT=250mW at VCC=6V, RL=32ohm, THD=10% *Load impedance range: 8~100ohm *Mute function (ICC=65mA, typ) *Minimum number of external parts required. *Low distortion	Mute	2.0V~16.0V	6.0V		DIP-8 SOP-8
				0.25W(RL=32Ω)	<10%
MC3419	Low Power Audio Amplifier 0.4W max *Low quiescent supply current (Icc=2.7mA, typ) *Medium output power (Po=250mW at Vcc=6V, RL=32ohm, THD=10%) *Load impedance range (8 to 100ohm) *Low distortion *Mute function (Icc=65μA, typ) *Minimum number of external parts required	Mute	2.0V~16.0V	6.0V		DIP-8 SOP-8 TSSOP-8
				0.25W(RL=32Ω)	<10%
MC34119	Low Power Audio Amplifier 0.4W max * Wide operating supply voltage: VCC=2V~16V * Low quiescent supply current (ICC=2.7mA, typ) * Medium power output over 250mW at VCC=6V, RL=32Ω, THD＜10% * Load impedance range (8Ω~100Ω) * Low total harmonic distortion (0.5% typ) * Mute function (ICC=65μA, typ) * Minimum number of external parts required	Mute	2.0V~16.0V	6.0V		DIP-8 SOP-8 TSSOP-8 DFN3030-8
				0.25W(RL=32Ω)	<10%
PA4990	1.2W Audio Power Amplifier with Active-low Shutdown Function * Operating: VCC=2.2V ~ 5.5V * 1.2W output power, VCC=5V, THD=1%, f=1kHz, 8Ω Load * In shutdown mode: Ultra-low consumption (10nA) * In grounded mode: 62dB PSRR @ 217Hz * POP & CLICK near-zero * Ultra-low distortion :0.1% (typ)	Standby	2.2V~ 5.5V	5.0V		SOP-8 MSOP-8
				Typ=1.2W(RL=8Ω)	1%
TDA8541	1W BTL Audio Amplifier * Low saturation voltage of output stage * External resistors could fix Gain * Low standby current * No switch-on/switch-off plops * High SVRR * Protected against outputs short-circuit to ground, VCC and across the load * Thermal shut-down protection	PNP-NPN output stage and standby/mute logic	2.3V ~18.0V	5.0V		SOP-8
				1.0W(RL=8Ω)	10%
PA6204	1.7W Mono Fully Differential Audio Power Amplifier * 1.7W into 8Ω from a 5-V supply at THD=10% (Typ.) * 2.5V-5.5V operation * Low supply current: 4mA typ at 5V * Ultra low current shutdown mode * Only three external components - Improved PSRR (-80dB) for direct battery operation - Fully differential design reduces RF rectification - -63dB CMRR eliminates two input coupling capacitors * Fast startup with minimal pop	Standby、Gain Setting	2.5V~ 5.5V	5.0V		SOP-8 MSOP-8 DFN3030-8
				Typ=1.7W(RL=8Ω)	10%
TA7368P	0.6W Audio Power Amplifier * Very Few External Components(Only Three Capacitors) * Low Quiescent Current * High Voltage Gain: Gv=40dB	Gain Setting	3.0V~14.0V	9.0V		DIP-8 SIP-9
				Typ=1.1W(RL=8Ω)	10%
AN17823	BTL 4.0W x 1ch Power Amplifier with Standby Function and Volume Function * 3-W output (8Ω) with supply voltage of 8V * 4-W output (8Ω) with supply voltage of 9V * On-chip standby function * On-chip volume function	Standby、Mute	3.5~13.5V	9.0V		HSIP-9B
				Typ=4W(RL=8Ω)	10%
LM386	0.7W Low Voltage Audio Power Amplifier *Battery Operation *Minimum External Parts *Wide Supply Voltage Range: 4V~12V *Low Quiescent Current Drain:4mA *Voltage Gains: 20~200 *Ground Referenced Input *Self-Centering Output Quiescent Voltage *Low Distortion: 0.2% (Av=20, VS=6V, RL=8Ω, PO=125mW, f=1kHz)	Gain Setting	4.0V~12.0V	9.0V		DIP-8 SOP-8 TSSOP-8
				Typ=0.7W(RL=8Ω)	10%
TDA2050	32W Hi-Fi Audio Power Amplifier 22W @ Distortion 0.5% * High output power (50W Music Power IEC 268.3 Rules) * High operating supply voltage (50V) * Single or split supply operations * Very low distortion * Short circuit protection (OUT to GND) * Thermal shutdown	-	±4.5V~ ±25.0V	±22.0V		TO-220B TO-220B1 TO-220-5 TO-263-5
				Typ=32W(RL=8Ω)	10%
TDA2030	14W Hi-Fi Audio Power Amplifier * Very low external component required. * High current output and high operating voltage. * Low harmonic and crossover distortion. * Built-in Over temperature protection. * Short circuit protection between all pins. * Safety Operating Area for output transistors.	-	±6.0V~±18.0V	±16.0V		TO-220B TO-220-5 TO-220B1
				Typ=14W(RL=4Ω)	0.5%
TDA2030A	18W Hi-Fi Audio Power Amplifier	-	±6.0V~±22.0V	±16.0V		TO-220B TO-220-5 TO-220B1
				Typ=18W(RL=4Ω)	0.5%
TDA2003	10W Car Radio Audio Power Amplifier *Very Low External Component Required. *High Current Output ( up to 3 A). *Low Harmonic and Crossover Distortion. *Built-in Over Temperature Protection. *Short Circuit Protection Between all Pins.	-	8.0V~18.0V	16.0V		TO-220B TO-220-5 TO-220B1 TO-263-5
				Typ=10W(RL=2Ω)	10%
TDA7360	20W Bridge/Stereo Audio Amplifier with Clipping Detector * Very few external components * Without boucherot cells * Without boostrap capacitors * High output power * Very low STAND-BY current * Fixed gain (20dB stereo) * Programmable turn-on delay * Clipping detector * No switch on/off noise * STAND-BY function	Standby、BTL and SE Mode	8.0V~18.0V	14.4V		HZIP-11A HZIP-15A
				Typ=20.0W(RL=4Ω)	10%
TBA820M	1.2W Audio Power Amplifier *Wide operating supply voltage: Vcc=3~14V *Medium output power POUT=1.2W at Vcc=9V,RL=8Ω, THD=10% *Low quiescent circuit current: IQ=4mA(type) *Good ripple rejection. *Minimum number of external parts required.	-	16.0V	9.0V		SOP-8 DIP-8
				Typ=1.2W(RL=8Ω)	10%
A7240	20W Bridge Amplifier for Car Radio * Few External Components * Output Protected Against short Circuits to Ground and Across Load * Dump Transient * Thermal Shutdown * Loudspeaker Protection * High Current Capability * Low Distortion/Low Noise	Standby	18.0V	14.4V		TO-220Z7
				Typ=20W(RL=4Ω)	10%
LM1875	20W Audio Power Amplifier *Up to 30W output power *Avo typically 90 dB *Low distortion: 0.015%,1kHz,20W *Wide power bandwidth: 70kHz *Protection for AC and DC short circuits to ground *Thermal protection with parole circuit *High current capability: 4A *Wide supply range 16V-60V *Internal output protection diodes *94 dB ripple rejection	-	16.0V~60.0V	±25.0V		TO-220B TO-220-5
				Typ=25W(RL=8Ω)	1%

*Under  Development

Single Channel Audio Power Amplifier （Class D）
Part No.	Features	Function	Supply Voltage	VCC		Package
				Output Power (W)	THD
M4670	3W Filterless High Efficiency Switching Audio Amplifier * Externally Configurable Gain * No Output Filter Required for Inductive Loads * Very Fast Turn on Time: 1.05ms (Typical) * ‘Click and Pop’ Suppression Circuitry * Micro-Power Shutdown Mode * Short Circuit Protection	Standby	2.4V~5.5V	5.0V		DFN3030-8
				Typ=3W(RL=4Ω)	10%
DPA5V3F	2.8W Filter-free Mono Class D Audio Power Amplifier * Operating from VCC=2.4V~5.5V * Standby mode active low * Low current consumption 2mA at 3V * Adjustable gain via external resistors * Output power: 2.8W into 4Ω and 1.7W into 8Ω with 10% THD+N maximum and 5 V power supply * Output power: 2.2W at 5V or 0.7W at 3.0V into 4Ω with 1% THD+N maximum * Output power: 1.4W at 5V or 0.5W at 3.0V into 8Ω with 1% THD+N maximum * PWM base frequency: 280kHz * Efficiency: 88% typical * Signal to noise ratio: 85dB typical * PSRR: 63dB typical at 217Hz with 6dB gain * Low pop & click noise	Standby	2.4V~5.5V	5.0V		SOP-8
				Typ=2.8W(RL=4Ω)	10%

*Under  Development

 

Multi-Channel High Power Audio Amplifier(Dual/Quad Channels)
Part No.	Features	Function	Supply Voltage	VCC		Package
				Output Power (W)	THD
TDA6375	2x22W  Dual / Quad Power Amplifier For Car Radio *High output power capability – 2 x 27 W Max. / 4 Ω – 2 x 20W/ 4 Ω @14.4V,1KHz, 10% – 2 x 22 W  4 Ω EIAJ – 4 x 6.5W / 4Ω@14.4V,1KHz, 10% – 4 x 12W / 2Ω@14.4V,1KHz, 10% *Minimum external components: - No bootsrtap capacitors - No boucherot cells - internally fixed gain (26dB BTL) * Stand-by function(CMOS compatible) * No audible pop during st-by operations * Diagnostics facility for: - Clipping - Out to GND short - Out to Vs short - Soft short at turn-on - Thermal shutdown proximity		8.0V~18.0V	14.4V		HZIP-15A
				Typ=20W(RL=4Ω)	10%
TDA7377	2x30W Dual / Quad Power Amplifier For Car Radio * High Output Power@VCC=14.4V, f=1KHz，RL=4Ω: – 2 x 35W Max. – 2 x 20W@THD= 10% – 4 x 6 W @10% – 4 x 10W / 2Ω@10% – 2 x 30W / EIAJ@ VCC =13.7V，RL=4Ω * CMOS Compatible Stand-by Function (Low ICC) * No Audible pop During st-by Operations * Internally Fixed Gain (26dB BTL and 20dB single ended) * No Bootstrap Capacitors and boucherot Cells * Diagnostics Facility on pin10 when output Clipping, shorted to Vcc or GND, thermal shutdown and soft short at turn on. * Rail to rail output swing * Absolute Stability Without Any External Compensation	Standby、BTL and SE Mode	8.0V~18.0V	13.7V		HZIP-15A HZIP-15D
				Typ=30W(RL=4Ω)	-
TDA7375	2x35W Dual / Quad Power Amplifier For Car Radio * High Output Power@Vcc=14.4V, f=1kHz，RL=4Ω: – 2 x 40W Max. – 2 x 25W@THD= 10% – 4 x 7 W @10% – 4 x 12W / 2Ω@10% – 2 x 35W / EIAJ@Vcc=13.7V，RL=4Ω * CMOS Compatible Stand-by Function (Low Icc) * No Audible pop During st-by Operations * Internally Fixed Gain (26dB BTL and 20dB single ended) * No Bootstrap Capacitors and boucherot Cells * Diagnostics Facility on pin10 when output Clipping、shorted to Vcc or gnd、thermal shutdown and soft short at turn on. * Rail to rail output swing * Absolute Stability Without Any External Compensation		8.0V~18.0V	13.7V		HZIP-15A HZIP-15D
				Typ=35W(RL=4Ω)	-
TDA7388	4x41W Quad Bridge Car Radio Amplifier * High Output Power@ VCC=14.4V, f=1kHz, RL=4 Ω: -4 x 41W Max. -4 x 25W @THD=10% * Rail to rail output voltage swing * Low THD & eNo		8.0V~18.0V	14.4V		HZIP-25B
				Typ=26W(RL=4Ω)	10%

*Under  Development

Stereo Audio Power Amplifier with DC Volume Control (Class AB & Class B）
Part No.	Features	Function	Supply Voltage	VCC		Package
				Output Power (W)	THD
TDA7053A	2x1.1W Stereo BTL Audio Output Amplifier with DC Volume Control and Mute Function * DC volume control * Few external components * Mute mode * Thermal protection * Short-circuit proof * No switch-on and switch-off clicks * Good overall stability * Low power consumption * Low HF radiation * ESD protected on all pins.	DC Volume Control	4.5V ~ 18V	6.0V		DIP-16 SOP-16
				Typ=1.1W(RL=8Ω)	10%
TDA7052A	1W BTL MONO AUDIO AMPLIFIER WITH DC VOLUME CONTROL * Low power consumption * DC volume control * Mute mode * No switch-on and off clicks * Short-circuit proof * Good overall stability * Low HF radiation * Few external components * Thermal protection * ESD protected on all pins * Missing Current Limiter (MCL)	DC Volume Control	4.5V ~ 18V	6.0V		SOP-8 DIP-8
				Typ=1.1W(RL=8Ω)	10%
PA4838	2x2.0W Stereo Audio Power Amplifier with 32 Steps DC Volume Control and Selectable Gain * DC Volume Control Interface * System Beep Detect * Stereo switchable bridged/single-ended power amplifiers * Selectable internal/external gain and bass boost * ”Click and pop” suppression circuitry * Thermal shutdown protection	DC Volume Control、Standby、Mute、Selectable Gain	2.7V ~ 5.5V	5.0V		HTSSOP-28 TSSOP-28
				Typ=2.0W(RL=4Ω)	1%
PA7493	2x2.0W Stereo Class AB Audio Power Amplifier with 32 Steps Volume Control and Two Output Modes BTL/SE * Stereo switch able bridged/single-ended power amplifiers * Output power 2W × 2 (VCC=6V, THD=1%, RL=4Ω) * Low harmonics distortion * Include 32 steps volume controller by DC voltage with ysteresis * “Click and pop” suppression circuitry * Low current consumption in SHUTDOWN Mode(0.7μA) * Thermal shutdown	DC Volume Control、Standby、BTL and SE Mode	3.0V ~ 6.0V	5.0V		DIP-16 SOP-16
				Typ=2W(RL=4Ω)	10%
PA6021	2x2.0W Stereo Audio Power Amplifier with 32 Steps DC Volume Control * 2 W Into 4-W speakers with external heatsink * DC volume control with 2-dB * Steps from -40 dB ~ 20 dB * – Fade Mode * – -85-dB Mute Mode * Differential Inputs * 1-μA Shutdown Current (Typical) * Headphone Mode	DC Volume Control、Standby、BTL and SE Mode	4.0V ~ 5.5V	5.0V		DIP-20
				Typ=2W(RL=4Ω)	10%
TDA7496L	2x2.0W Stereo Audio Power Amplifier with DC Volume Control with Stand-By Function * Linear volume control, Stand-by and mute functions * Silent Turn On/Off * No boucherot cell * 2 x 2W output power: RL=8Ω@THD=10%, VCC=14V * No ST-BY RC input network * Internally Fixed Gain (Typ.=30dB) * Single supply (Max.=18V) * Soft clipping * Output DC Short Circuit protection when shorted to GND or VCC. * Thermal shutdown * Variable output after volume control circuit	DC Volume Control、Standby	10.0V ~ 18.0V	14.0V		DIP-20 SOP-20 HZIP-15D
				Typ=2.0W(RL=8Ω)	10%
PA7468	2x2.6W Stereo Audio Power Amplifier 32 Steps Volume Control and Two Output Modes BTL/SE * Low Operating Current: 9mA *Two Output Modes Allowable with BTL and SE Modes(chosen by SE/BTL pin) *Low Current Consumption :1mA(in Shutdown Mode) *With Short Circuit Protection *With Thermal Shutdown Protection *With Over Current Protection Circuitry *Eliminating Turn-on and Turn-off Transients in Outputs by Improved Depop Circuitry to. *Very High PSRR *32 Steps Volume Adjustable *BTL Mode :2.6W per Channel Output Power into 4Ω Load at 5V	DC Volume Control、Standby、Mute、BTL and SE Mode	4.5V ~ 5.5V	5.0V		SOP-16
				Typ=2.6W(RL=4Ω)	10%
PA7469	2x2.6W Stereo Audio Power Amplifier 32 Steps Volume Control and Two Output Modes BTL/SE * Low operating current: 9mA * Two output modes allowable with BTL and SE modes selected by SE/BTL pin * Low current consumption in shutdown mode :1μA * Short circuit protection * Thermal shutdown protection and over current protection circuitry * Improved depop circuitry to eliminate turn-on and turn-off transients in outputs * Very high PSRR * 32 Steps volume adjustable * BTL mode: 2.6W per channel output power into 4Ω Load at 5V	DC Volume Control、Standby、BTL and SE Mode	4.5V ~ 5.5V	5.0V		DIP-16 SOP-16
				Typ=2.6W(RL=4Ω)	10%
TDA8496	2x5.0W Stereo Audio Power Amplifier with DC Volume Control with Stand-By Function * 5+5w output power @ VCC= 22V; RL = 8Ω * Low turn-on turn-off pop noise * Low external components * Short circuit & thermal overload protection * Linear volume control by DC voltage * Soft clipping * Internally fixed gain * St-by and mute functions	DC Volume Control、Standby、Mute	10.0V ~32.0V	22.0V		HZIP-15A/B/D
				5.0W(RL=8Ω)	10%

*Under  Development

Stereo Headphone Driver Amplifier (Class AB & Class B）
Part No.	Features	Function	Supply Voltage	VCC		Package
				Output Power (W)	THD
A4537	Power Amplifier for 1.5V Headphone Stereos *Low current drain *16Ω  load drive capability * excellent power supply ripple rejection *Less harmonic interference in radion band *On-chip power switch function, mution function	Mute	0.9V~4.0V	1.5V		MSOP-10 SSOP-10
				Typ=8mW(RL=16Ω)	10%
3544	Headphone Amplifier for CD-ROM with Mute Function * Internal mute function to prevent popping sounds when *the power is turned on and off. * Built-in thermal shutdown circuit (150°C) to prevent *damage to the IC if a short circuit occurs.	Mute	2.8V~6.5V	5.0V		DIP-8 SOP-8
				Typ=62mW(RL=16Ω)	<0.1%
S486	Dual 100mW Audio Power Amplifier with Shutdown Function * Operating voltage range VCC=2V ~ 5.5V * Output power: - 102mW @5V into 16Ω with 0.1% THD+N max (1kHz) * Stand by mode available * Low current consumption: 2.5mA max * Click and pop reduction circuitry * Unity-gain stable * Short circuit protected	Standby	2.0V~5.5V	5.0V		SOP-8 MSOP-8
				Typ=102mW(RL=16Ω)	0.1%
3541	Class AB Stereo Headphone Driver with Mute Function * Built-in Mute Function * No Switch ON/OFF pops * Short-Circuit Protection * Low Power Consumption * Large Output Voltage Swing * High Signal-to-Noise Ratio	Mute	3.0V~6.0V	5.0V		DIP-8 SOP-8
				Typ=110mW(RL=16Ω)	<0.1%
PA2308	Class AB Stereo Headphone Driver * Output power less than 10% THD+N, VDD=5V(TYP) --280mW/CH (typical) into a 8Ω load --110mW/CH (typical) into a 32Ω load *Very High signal-to-noise ratio *Large output voltage swing *Good power supply ripple rejection *Low power consumption and Low distortion *Fix wide temperature range *Without switch ON/OFF clicks	-	3.0V~ 6.0V	5.0V		SOP-8
				110mW(RL=32Ω)	10%
PA3112	2x150mW Audio Power Amplifier Operation to 2.5V with Shutdown Function * Operating voltage range VDD=2.5V~5.5V * Output power: -150mW @5V into 16Ω * Differential inputs * Shutdown mode available * Low current consumption:3mA max * click and pop reduction circuitry * Unity-gain stable * Thermal and over-current protection	Standby	2.5V~5.5V	5.0V		MSOP-10
				Typ=150mW(RL=16Ω)	0.1%
L3305	Low Voltage Class B Amplifier * Low Operating Voltage range (1V～3V) * Low Operating current consumption * Feedback stabilized gain less than 80 dB * Output power exceeds 140 dBSPL	-	1.0V~3.0V	1.3V		TSSOP-14 SOP-14
				Output Power Exceeds 140dBSPL
PA3632	Direct 2-Vrms Audio Line Driver with Adjustable Gain * Low THD+N<0.01% at 2Vrms Into 10kΩ * Stereo Direct Audio Line driver 2Vrms Into 10KΩ With 3.3V Supply * Integrated Charge Pump Generates Negative Supply Rail * High SNR, >90dB * Ground-Referenced Outputs Eliminate DC-Blocking Capacitors * Differential Input and Single-Ended Output * Adjustable Gain by External Gain-Setting Resistors * Pop-Free Under-Voltage Protection * Short-Circuit Protection * Click- and Pop-Reduction Circuitry * Active Mute Control for Pop-Free Audio On/Off Control	Mute、Charge Pump、Under-voltage protection	3.0V~3.6V	3.3V		TSSOP-14
				Typ=2.4Vrms	1%
PA3138	* Low THD+N<0.01% at 10mW Into 32Ω * Stereo Direct Headphone Amplifier driver 40 mW Into 32Ω With 3.3-V Supply * Integrated charge pump Generates Negative Supply Rail * High SNR, >90dB * Ground-Referenced Outputs Eliminate DC-Blocking Capacitors * Differential Input and Single-Ended Output * Adjustable Gain by External Gain-Setting Resistors * Pop-Free Under-Voltage Protection * Configurable as a Second-Order Low-Pass Filter Ideal for PWM Audio Sources * Short-Circuit Protection * Click- and Pop-Reduction Circuitry * Active	Mute、Charge Pump、Under-voltage protection	3.0V~3.6V	3.3V		TSSOP-14
				Typ=30mW(RL=32Ω)	1%