UNISONIC TECHNOLOGIES CO., LTD PA4867 CMOS IC 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 4Ω load or 2.4W to a 3Ω 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. FEATURES * Operating voltage range VDD=2V~5.5V * Output power: -2.4W(typ.)@5V into 3Ω with 1% THD+N max (1kHz) -2.1W(typ.)@5V into 4Ω 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 Ordering Number Lead Free Halogen Free PA4867L-N20-R PA4867G-N20-R PA4867L-N20-T PA4867G-N20-T PA4867L-P20-R PA4867G-P20-R PA4867L-P20-T PA4867G-P20-T www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd Package Packing HTSSOP-20 HTSSOP-20 TSSOP-20 TSSOP-20 Tape Reel Tube Tape Reel Tube 1 of 7 QW-R502-125.B PA4867 CMOS IC PIN CONFIGURATION SHUTDOWN 1 20 HP-IN GND 2 19 GND +OUT A 3 18 +OUT B VDD 4 17 VDD -OUT A 5 16 -OUT B -IN A1 6 15 -IN B1 GND 7 14 BYPASS +IN A 8 13 +IN B -IN A2 9 12 NC MUX CTRL 10 11 -IN B2 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 -INA1 +INA -INA2 MUX CTRL -INB2 NC +INB BYPASS -INB1 -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 A1 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 B1 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.B PA4867 CMOS IC ABSOLUTE MAXIMUM RATINGS PARAMETER 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. SYMBOL 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 = 3Ω 2.2 THD=1%, f=1kHz RL = 4Ω RL = 8Ω MAX UNIT 5.5 15 6 2 V mA mA μA 50 mV W 1.9 W 1.1 W RL = 3Ω 3.0 W RL = 4Ω 2.6 W RL = 8Ω 1.5 THD+N=1%, f=1kHz, RL=32Ω 20Hz ≤ f ≤ 20kHz, RL =4Ω, POUT =2W Total Harmonic Distortion+Noise THD+N AVD=2 RL =8Ω, POUT =1W VDD=5V, VRIPPLE=200mVRMS, RL=8Ω, Power Supply Rejection Ratio PSRR CB=2.2μF Channel Separation XTALK f=1kHz, CB=2.2μF Signal To Noise Ratio SNR VDD=5V, POUT=1.1W, RL=8Ω FOR SINGLE-ENDED OPERATION Output Offset Voltage VO(OFF) VIN=0V THD = 0.5%, f = 1kHz, RL = 32Ω THD+N = 1%, f = 1kHz, RL = 8Ω THD+N = 1%, f = 1kHz, RL = 16Ω Output Power POUT THD+N = 1%, f = 1kHz, RL = 32Ω THD+N = 10%, f = 1kHz, RL = 16Ω THD+N = 10%, f = 1kHz, RL = 32Ω 0.34 0.3 0.3 W W % % 67 dB 80 97 dB dB Output Power POUT THD+N=10%, f=1kHz Output Voltage Swing Total Harmonic Distortion+Noise Power Supply Rejection Ratio Channel Separation Signal To Noise Ratio VOUT THD = 0.05%,RL = 5kΩ AV=-1, POUT=75mW THD+N 20Hz≤f≤20kHz, RL=32Ω CB=2.2μF, VRIPPLE=200mVRMS PSRR f=1kHz XTALK f=1kHz, CB=2.2μF SNR VDD=5V, POUT=340mW, RL=8Ω UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 1.0 75 5 85 180 165 88 208 114 50 mV mW mW mW 1 VP-P 0.2 % 52 dB 60 95 dB dB 3 of 7 QW-R502-125.B PA4867 CMOS IC TYPICAL APPLICATION CIRCUIT Rf 20KΩ Rf 20KΩ Audio Input CI 0.33µF Audio Input 9 -IN A2 RI 20KΩ CI 0.33µF Bias Control 20 HP-IN 14 Bypass M U X 15 -IN B1 Voltage Bypass And De-pop Noise 13 +IN B Audio Input Thermal Shutdown 20KΩ CI 0.33µF 20KΩ 20KΩ Ring Control Pin 3 AmpAS +OUT A Sleeve Control Pin AmpBM 20KΩ 20KΩ RI -OUT A 5 AmpAM 20KΩ 10 MUX CTRL 11 -IN B2 Audio CI Input 0.33µF R I GND 2, 7, 19 M U X 6 -IN A1 8 +IN A 1 Shutdown CB 2.2µF CS 0.1µF 4, 17 RI 20KΩ VDD -OUT B 16 20KΩ Tip Headphone 20KΩ 18 AmpBS +OUT B 12 Rf 20KΩ Rf 20KΩ Figure 1. Typical Audio Amplifier Application Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 7 QW-R502-125.B PA4867 TYPICAL CHARACTERISTICS THD+N vs. Frequency AVD=20 AVD=10 AVD=2 0.1 0.010 100 20 10 1k Frequency (Hz) VDD=5V, POUT=150mW RL=16Ω, CO=1000μF Single Ended, No Filters 1 AV=-10 AV=-5 AV=-1 0.1 10k 20k 0.010 20 THD+N vs. Output Power 100 VDD=5V, RL=8Ω Bridged Load AVD=2,BW<80kHz VDD=5V, RL=16Ω Single Ended AV= -1, BW<80kHz 1 1 f=20Hz f=20kHz 0.1 f=20kHz 0.1 f=20Hz f=1kHz f=1kHz 0.010 10m 0.1 Output Power (W) 2 1 0.010 10m Output Power vs. Supply Voltage 2 f=1kHz 1.75 RL=8Ω Bridged Load 1.5 BW<80kHz 1.25 Output Power (W) 10% THD+N 0.75 0.5 1.75 1% THD+N 2.5 3 3.5 4 4.5 5 5.5 Supply Voltage (V) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0.5 Output Power vs. Load Resistance VDD=5V f=1kHz AVD=2 Bridged Load BW<80kHz 1.25 1 0.75 10% THD+N 0.5 0.25 0.25 2 0.1 Output Power (W) 1.5 1 0 1k 10k 20k Frequency (Hz) THD+N vs. Output Power 10 THD+N (%) THD+N (%) VDD=5V, POUT=1W RL=8Ω Bridged Load, No Filters 1 THD+N vs. Frequency 5 THD+N(%) THD+N (%) 5 Output Power (W) CMOS IC 0 1% THD+N 8 10 20 30 40 50 60 70 Load Resistance (Ω) 5 of 7 QW-R502-125.B PA4867 Output Power (W) Power Dissipation (W) TYPICAL CHARACTERISTICS(Cont.) Power Derating Curve RL=8Ω 2 1.5 1 0.5 0 -40 Power Dissipation vs. Output Power 0.25 Power Dissipation (W) Power Dissipation (W) 2.5 0 40 120 80 Temperature (℃) 0.2 0.15 RL=16Ω 0.1 0.05 160 0 RL=32Ω VDD=5V f=1kHz Single Ended THD+N≤1.0% BW<80kHz 0.1 0.3 0.2 Output Power (W) 0.4 PSRR (dB) Crosstalk (dBr) CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 7 QW-R502-125.B PA4867 Phase (o) Supply Current (mA) TYPICAL CHARACTERISTICS(Cont.) Gain (dB) 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 7 of 7 QW-R502-125.B