芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 ■ General Description The LM4888 is a dual bridge-connected audio power amplifier which, when connected to a 5V supply, will deliver 2.1W to a 4Ω load (Note 1) or 2.4W to a 3Ω load (Note 2) with less than 1.0% THD+N. A user selectable “3D Enhancement” mode provides enhanced stereo imaging. The LM4888SQ also has two separate HP (headphone) enable inputs, each having different logic level thresholds. Either HP enable input activates the single ended headphone mode and disables the BTL output mode. The HP Sense input is for use with a normal stereo headphone jack. The remaining input, HP Logic, accepts standard logic level thresholds. 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 LM4888SQ combines dual bridge speaker amplifiers and stereo headphone amplifiers on one chip. The LM4888SQ features a low-power consumption shutdown mode and thermal shutdown protection. It also utilizes circuitry to reduce “clicks and pops” during device turn-on. ■ Key Specifications PO at 1% THD+N & VDD=5V RL=3Ω RL=4Ω RL=8Ω Single-ended mode THD+N at 75mW into 32 Ω(5V,1kHz) Shutdown current Supply voltage range PSRR at fIN=217HZ 2.4W(typ.) 2.1W(typ.) 1.3W(typ.) 0.01%(typ.) 0.04uA(typ.) 2.7V~5V 85dB(typ.) ■ Features z z z z z z z National 3D Enhancement Selectable headphone enable modes Stereo headphone amplifier mode Improved “click and pop” suppression circuitry Thermal shutdown protection circuitry PCB area-saving SQ package Micro power shutdown mode 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 ■ Applications z z z z Cell phones Multimedia monitors Portable and desktop computers Portable audio systems ■ Connection Diagrams TOP VIEW XXYY 为芯片封装批号 Order Number：LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 ■ Typical Application ■ Absolute Maximum Ratings Parameter Symbol Value Unit Supply Voltage VDD -0.3—6.0 V Input Voltage VIN -0.3—VDD+0.3 V Power Dissipation Internally limited Storage Temperature Tstg -65—150 ℃ Junction Temperature — -150 ℃ ESD Susceptibility — 2000 V ■Operating Ratings Temperature Range TMIN ≤ TA ≤ TMAX Supply Voltage −40°C ≤ TA ≤ 85°C 2.2V ≤ VDD ≤ 5.5V 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 ■ Electrical Characteristics(5V) (VDD = 5V Symbol VDD IDD ISD VIH VIL Unless otherwise specified. Limits apply for TA = 25°C.) Parameters Test Conditions Min. Typ. Max. Unit — 2.7 — 5.5 V VIN = 0V, Io = 0A, BTL Mode — 6 10 mA — 3 6 mA VSHUTDOWN = 0V — 0.04 2 μA — 3.7 4 — V — — 0.8 2.6 V — 1.4 1.2 — V — — 1 0.4 V — 140 — ms Supply Voltage Quiescent Power Supply Current VIN = 0V, Io = 0A, SE Mode Shutdown Current Headphone Sense High Input Voltage Headphone Sense Low Input Voltage Shutdown, Headphone VSDIH micro,3D control High Input voltage Shutdown, Headphone VSDIL micro,3D control Low Input voltage TWU Turn On Time Bypass Cap CBP=1μF ■ Electrical Characteristics for Bridged-Mode Operation(5V) (VDD = 5V Symbol VOS Unless otherwise specified. Limits apply for TA = 25°C.) Parameters Output Offset Voltage Test Conditions Min. Typ. Max. Unit VIN = 0V — 5 25 mV 1.0 2.4 2.1 1.3 — W — 3.0 2.5 1.7 — W THD+N = 1%; f = 1 kHz RL=3Ω RL=4Ω PO Output Power RL=8Ω THD+N = 10%; f = 1 kHz RL=3Ω RL=4Ω RL=8Ω THD+N PSRR Total Harmonic Distortion+Noise Power Supply Rejection Ratio AVD=2; f = 1kHz RL=4Ω,PO=1W — 0.1 0.06 — % — 85 — dB RL=8Ω,PO=0.4W Input Unterminated，Vripple = 200mVp-p, 217Hz CBP=1μF, RL=8Ω Input Unterminated，Vripple = 80 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 200mVp-p, 1kHz ,CBP=1μF, RL=8Ω Input grounded，Vripple = 200mVp-p, 65 217Hz, CBP=1μF, RL=8Ω Input grounded，Vripple = 200mVp-p, 70 1kHz, CBP=1μF, RL=8Ω XTALK VNO Channel Separation f=1kHz,CBP=1μF,3D Control = Low — 82 — dB 1 kHz, A-weighted — 21 — μV Output Noise Voltage ■ Electrical Characteristics for Single-Ended Operation(5V) (VDD = 5V Unless otherwise specified. Limits apply for TA = 25°C.) Symbol Parameters PO Output Power THD+N Test Conditions THD+N = 0.5%; f = 1 kHz RL=32Ω Total Harmonic f = 1kHz Distortion+Noise RL=32Ω,PO=20mW Min. Typ. Max. Unit 75 90 — mW — 0.015 — % — dB Input Unterminated，Vripple = 70 200mVp-p, 217Hz CBP=1μF, RL=32Ω Input Unterminated，Vripple = 72 200mVp-p, 1kHz PSRR Power Supply CBP=1μF, RL=32Ω Rejection Ratio Input grounded，Vripple = 200mVp-p, — 65 217Hz CBP=1μF, RL=32Ω Input grounded，Vripple = 200mVp-p, 70 1kHz CBP=1μF, RL=32Ω XTALK VNO Channel Separation Output Noise Voltage f=1kHz,CBP=1μF,3D Input grounded 1 kHz, A-weighted — 80 — dB — 11 — μV ■ Electrical Characteristics(3V) (VDD = 3V Symbol IDD Unless otherwise specified. Limits apply for TA = 25°C.) Parameters Test Conditions Min. Typ. Max. Unit Quiescent Power VIN = 0V, Io = 0A, BTL Mode — 4.5 — mA Supply Current VIN = 0V, Io = 0A, SE Mode — 2.5 — mA 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 ISD VIH VIL Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 Shutdown Current VSHUTDOWN = 0V — 0.01 — μA — — 2.2 — V — — 1.5 — V — 1.4 1 — V — 0.8 0.4 V — 140 — ms Headphone Sense High Input Voltage Headphone Sense Low Input Voltage Shutdown, Headphone VSDIH micro,3D control High Input voltage Shutdown, Headphone VSDIL micro,3D control Low Input voltage TWU Turn On Time Bypass Cap CBP=1μF ■ Electrical Characteristics for Bridged-Mode Operation(3V) (VDD = 3V Symbol VOS PO THD+N Unless otherwise specified. Limits apply for TA = 25°C.) Parameters Output Offset Voltage Output Power Total Harmonic Distortion+Noise Test Conditions Min. Typ. Max. Unit VIN = 0V — 5 — mV THD+N = 1%; f = 1 kHz RL=3Ω RL=4Ω RL=8Ω — 0.82 0.70 0.43 — W THD+N = 10%; f = 1 kHz RL=3Ω RL=4Ω RL=8Ω — — W AVD=2; f = 1kHz RL=4Ω,PO=1W RL=8Ω,PO=0.4W — — % — dB — dB 1.0 0.85 0.53 0.1 0.05 Input Unterminated，Vripple = 90 200mVp-p, 217Hz CBP=1μF, RL=8Ω Input Unterminated，Vripple = PSRR Power Supply 200mVp-p, 1kHz CBP=1μF, RL=8Ω Rejection Ratio Input grounded，Vripple = 80 — 65 200mVp-p, 217Hz CBP=1μF, RL=8Ω Input grounded，Vripple = 73 200mVp-p, 1kHz CBP=1μF, RL=8Ω XTALK Channel f=1kHz,CBP=1μF,3D Control = — 85 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Separation VNO Output Noise Voltage Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 Low 1 kHz, A-weighted 21 — — μV ■ Electrical Characteristics for Single-Ended Operation(3V) (VDD = 3V Unless otherwise specified. Limits apply for TA = 25°C.) Symbol Parameters Test Conditions Min. Typ. Max. Unit PO Output Power THD+N = 0.5%; f = 1 kHz RL=32Ω — 35 — mW — 0.015 — % — dB THD+N Total Harmonic Distortion+Noise f = 1kHz RL=32Ω,PO=20mW Input Unterminated，Vripple = 71 200mVp-p, 217Hz CBP=1μF, RL=32Ω Input Unterminated，Vripple = PSRR Power Supply 200mVp-p, 1kHz CBP=1μF, RL=32Ω Rejection Ratio Input grounded，Vripple = 79 — 65 200mVp-p, 217Hz CBP=1μF, RL=32Ω Input grounded，Vripple = 72 200mVp-p, 1kHz CBP=1μF, RL=32Ω XTALK VNO Channel f=1kHz,CBP=1μF,3D Control = Separation Low Output Noise Voltage 1 kHz, A-weighted — 80 — dB — 11 — μV ■ Typical Performance Characteristics 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 联系电话：１５９９９６４４５７９ ８３１５１７１５ 芯美电子 Dual 2.1W Audio Amplifier Plus Stereo Headphone & 3D Enhancement LN4888 ■ Physical Dimensions QFN-24 联系电话：１５９９９６４４５７９ ８３１５１７１５