UNISONIC TECHNOLOGIES CO., LTD PA4871 CMOS IC 1.1W AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE 1 DFN-8(3x3) DESCRIPTION As a mono bridged power amplifier which is operating on a single 5V supply, the UTC PA4871 is capable of delivering 1.1W of output power per channel into 8Ω loads with less than 0.5% THD+N. The UTC PA4871 is optimally suited for low-power portable applications because of the it do not require output coupling capacitors, bootstrap capacitors or snubber networks. By using external gain-setting resistors, the closed loop response of the unity-gain stable PA4871 can be configured. SOP-8 FEATURES MSOP-8 * Output power at 0.5% THD+N Supply voltage:5V Delivering 1.1W into a 8Ω load * With shutdown mode * Stable unity-gain. * Halogen Free ORDERING INFORMATION Ordering Number PA4871G-30Q-8-R PA4871G-S08-R PA4871G-SM1-R Package DFN-8 SOP-8 MSOP-8 www.unisonic.com.tw Copyright © 2009 Unisonic Technologies Co., Ltd Packing Tape Reel Tape Reel Tape Reel 1 of 6 QW-R502-232.E PA4871 CMOS IC PIN CONFIGURATION SHUTDOWN 1 8 VOUT2 BYPASS 2 7 GND +IN 3 6 VDD -IN 4 5 VOUT1 DFN-8(3×3) SOP-8 / MSOP-8 PIN DESCRIPTION PIN NO 1 2 3 4 5 6 7 8 PIN NAME SHUTDOWN BYPASS +IN -IN VOUT1 VDD GND VOUT2 DESCRIPTION Shutdown control input pin. Connected to a bypass capacitor. + pin of input signal. - pin of input signal. Output pin1 Supply voltage GND Output pin2 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R502-232.E PA4871 CMOS IC BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R502-232.E PA4871 CMOS IC ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD 6 V Input Voltage VIN -0.3~VDD+0.3 V Power Dissipation PD Internally Limited W Junction Temperature TJ 150 °С Operating Temperature TOPR -40~+85 °С Storage Temperature TSTG -65~+150 °С 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. THERMAL DATA PARAMETER SYMBOL DFN-8(3×3) Junction to Ambient θJA SOP-8/MSOP-8 DFN-8(3×3) (Note) Junction to Case θJC SOP-8/MSOP-8 Note: Surface mounted on 1 in 2 copper pad of FR4 board RATINGS 59 140 4.3 35 UNIT °С/W °С/W °С/W °С/W ELECTRICAL CHARACTERISTICS (Ta=25°С, VDD=5V, RL=8Ω, unless otherwise specified) PARAMETER SYMBOL DC ELECTRICAL CHARACTERISTICS Supply Voltage VDD DC Differential Output Voltage VOUT(DIFF) Mute Mode Supply Current IDD Shutdown Mode Output Power POUT Total Harmonic Distortion+Noise THD+N Power Supply Ripple Rejection PSRR TEST CONDITIONS VIN=0V VIN=0V,IOUT=0A VPIN1=VDD THD=0.5%, fIN=1kHz THD=10%, fIN=1kHz POUT=1WRMS, 20Hz<fIN<20kHz, G=2V/V VDD=4.9V to 5.1V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN TYP MAX UNIT 2.0 5 5 6.5 0.6 1.10 5.5 50 10.0 2 V mV mA µA W 1.0 1.5 W 0.25 % 65 dB 4 of 6 QW-R502-232.E PA4871 CMOS IC TYPICAL APPLICATION CIRCUIT UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R502-232.E PA4871 CMOS IC TYPICAL CHARACTERISTICS Output Waveform 8 VDD=5V, RL=8Ω f=1KHz, THD=0.5% Output Waveform (v) 6 4 2 Vp-p=8.42 0 -2 -4 -6 -8 0 400 800 1200 1600 2000 Time (µs) 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 6 of 6 QW-R502-232.E