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| UNISONIC TECHNOLOGIES CO., LTD PA4867 DUAL 2.1W AUDIO AMPLIFIER PLUS STEREO HEADPHONE FUNCTION DESCRIPTION The UTC PA4867 is a stereo audio power amplifier capable of delivering typically 2.1W to a 4 load or 2.4W to a 3 load each channel with less than 1.0% THD+N using a 5V power supply. UTC PA4867 has a new circuit topolopy which can eliminate headphone output coupling capacitors. And an internal input MUX allows two sets of stereo inputs to the amplifier. The UTC PA4867 has integrated depop circuitry that virtually eliminates transients that cause noise in the speakers during power up and when using the shutdown modes. CMOS IC *Pb-free plating product number: PA4867L FEATURES * Operating voltage range VDD=2V~5.5V * Output power: -2.4W(typ.)@5V into 3 with 1% THD+N max (1kHz) -2.1W(typ.)@5V into 4 with 1% THD+N max (1kHz) * Eliminates SE-mode output coupling capacitors * Shutdown mode available * click and pop reduction circuitry * Unity-gain stable * Thermal-shutdown Protection * Input MUX control * SE/BTL mode available ORDERING INFORMATION Order Number Normal Lead Free Plating PA4867-N20-R PA4867L-N20-R PA4867-N20-T PA4867L-N20-T PA4867-P20-R PA4867L-P20-R PA4867-P20-T PA4867L-P20-T Package HTSSOP-20 HTSSOP-20 TSSOP-20 TSSOP-20 Packing Tape Reel Tube Tape Reel Tube www.unisonic.com.tw Copyright (c) 2007 Unisonic Technologies Co., Ltd 1 of 7 QW-R502-125.A PA4867 PIN CONFIGURATION CMOS IC PIN DESCRIPTION PIN NO. 1 2, 7, 19 3 4, 17 5 6 8 9 10 11 12 13 14 15 16 18 20 PIN NAME SHUTDOWN GND +OUTA VDD -OUTA -INA +INA -INA2 MUX CTRL -INB2 NC +INB BYPASS -INB -OUTB +OUTB HP-IN I/O I O O I I I I I I O O I PIN DESCRIPTION Entire IC into the shutdown mode when this pin connected to the VDD Ground Channel A + output in BTL mode, high impedance in SE mode Supply voltage Channel A - output in BTL mode, + output in SE mode Inverting input of channel A Non-inverting input of channel A, connected to BYPASS pin inside the IC Inverting input of channel A2 Inverting input of channel B2 No Connection Non-inverting input of channel B, connected to BYPASS pin inside the IC Internal mid-supply bias reference bypassing Inverting input of channel B Channel B - output in BTL mode, + output in SE mode Channel B + output in BTL mode, high impedance in SE mode Output mode select, connected to the VDD for SE mode or GND for BTL mode UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 7 QW-R502-125.A PA4867 ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL CMOS IC RATINGS UNIT Supply Voltage 6.0 V Input Voltage -0.3 ~ VDD+0.3 V Power Dissipation PD Internally Limited Junction Temperature TJ 150 Operating Temperature TOPR -40 ~ +85 Storage Temperature TSTG -65 ~ +150 Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. ELECTRICAL CHARACTERISTICS The following specifications apply for VDD= 5V unless otherwise specified. Limits apply for TA= 25 . PARAMETER SYMBOL TEST CONDITIONS MIN TYP FOR ENTIRE IC Supply Voltage VDD 2 VIN=0V, IOUT=0A, HP-IN=0V 7.5 Quiescent Power Supply Current IDD 3.0 VIN=0V, IOUT=0A, HP-IN=4V Shutdown Current ISD VDD applied to the SHUTDOWN pin 0.7 FOR BRIDGED-MODE OPERATION Output Offset Voltage VO(OFF) VIN=0V 5 RL = 3 2.2 THD=1%, f=1kHz Output Power POUT THD+N=10%, f=1kHz RL = 4 RL = 8 RL = 3 RL = 4 RL = 8 THD+N=1%, f=1kHz, RL=32 20Hz f 20kHz, RL =4, POUT =2W Total Harmonic Distortion+Noise THD+N AVD=2 RL =8, POUT =1W VDD=5V, VRIPPLE=200mVRMS, RL=8, Power Supply Rejection Ratio PSRR CB=2.2F Channel Separation XTALK f=1kHz, CB=2.2F Signal To Noise Ratio SNR VDD=5V, POUT=1.1W, RL=8 FOR SINGLE-ENDED OPERATION Output Offset Voltage VO(OFF) VIN=0V THD = 0.5%, f = 1kHz, RL = 32 THD+N = 1%, f = 1kHz, RL = 8 THD+N = 1%, f = 1kHz, RL = 16 Output Power POUT THD+N = 1%, f = 1kHz, RL = 32 THD+N = 10%, f = 1kHz, RL = 16 THD+N = 10%, f = 1kHz, RL = 32 Output Voltage Swing Total Harmonic Distortion+Noise Power Supply Rejection Ratio Channel Separation Signal To Noise Ratio THD = 0.05%,RL = 5k AV=-1, POUT=75mW THD+N 20Hzf20kHz, RL=32 CB=1.0F, VRIPPLE=200mVRMS PSRR f=1kHz XTALK f=1kHz, CB=2.2F SNR VDD=5V, POUT=340mW, RL=8 VOUT 1.0 1.9 1.1 3.0 2.6 1.5 0.34 0.3 0.3 67 80 97 5 85 180 165 88 208 114 1 0.2 52 60 95 50 MAX 5.5 15 6 2 50 UNIT V mA mA A mV W W W W W W W % % dB dB dB mV mW mW mW VP-P % dB dB dB 75 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 7 QW-R502-125.A PA4867 TYPICAL APPLICATION CIRCUIT Rf 20K CMOS IC Rf 20K Audio Input CI 0.33F VDD CS 0.1F RI 20K RI 4, 17 9 -IN A2 6 -IN A1 7 +IN A 10 MUX CTRL 1 Shutdown 20 HP-IN 14 Bypass 11 -IN B2 M U X M U X GND 2, 7, 19 AmpAM -OUT A 5 20K 20K AmpAS Audio Input 20K CI 0.33F 20K Bias Control Voltage Bypass And De-pop Noise AmpBM Control Pin 3 Ring CB 2.2F Audio CI Input 0.33F R I 20K RI Audio Input 20K CI 0.33F +OUT A Control Pin -OUT B 16 20K 20K AmpBS Sleeve Tip 15 -IN B1 13 +IN B Headphone 20K Thermal Shutdown 18 +OUT B12 Rf 20K Rf 20K Figure 1. Typical Audio Amplifier Application Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R502-125.A PA4867 TYPICAL CHARACTERISTICS CMOS IC THD+N (%) 10 THD+N vs. Output Power VDD=5V, RL=8 Bridged Load AVD=2,BW<80kHz THD+N(%) 10 THD+N vs. Output Power VDD=5V, RL=16 Single Ended AV= -1, BW<80kHz THD+N (%) 1 f=20Hz 0.1 f=20kHz THD+N (%) 1 f=20kHz f=20Hz f=1kHz 0.1 f=1kHz 0.010 10m 0.1 Output Power (W) 1 2 0.010 10m 0.1 Output Power (W) 0.5 Output Power (W) Output Power (W) f=1kHz 1.75 RL=8 Bridged Load 1.5 BW<80kHz 1.25 1 0.75 0.5 0.25 0 2 2.5 3 3.5 4 4.5 5 5.5 10% THD+N 1% THD+N 2 Output Power vs. Supply Voltage 1.75 1.5 1.25 1 0.75 0.5 0.25 0 Output Power vs. Load Resistance VDD=5V f=1kHz AVD=2 Bridged Load BW<80kHz 10% THD+N 1% THD+N 20 30 40 50 60 70 8 10 Supply Voltage (V) Load Resistance () UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 7 QW-R502-125.A PA4867 TYPICAL CHARACTERISTICS(Cont.) CMOS IC 2.5 Power Dissipation (W) 2 1.5 1 0.5 0 -40 Power Derating Curve Power Dissipation (W) Output Power (W) 0.25 Power Dissipation vs. Output Power RL=8 Power Dissipation (W) 0.2 0.15 RL=16 RL=32 0.1 VDD=5V f=1kHz Single Ended THD+N 1.0% BW<80kHz 0.4 0 40 80 Temperature ( 120 ) 160 0.05 0 0.1 0.3 0.2 Output Power (W) Crosstalk (dBr) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw PSRR (dB) 6 of 7 QW-R502-125.A PA4867 TYPICAL CHARACTERISTICS(Cont.) CMOS IC UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw Supply Current (mA) Gain (dB) Phase (o) 7 of 7 QW-R502-125.A |
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