UNISONIC TECHNOLOGIES CO., LTD LM4880 CMOS IC DUAL 250mW AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE DESCRIPTION The UTC LM4880 is a dual audio power amplifier capable of delivering typically 250mW per channel of continuous average power to an 8Ω load with 0.1% THD+N using a 5V power supply. The UTC LM4880 features an externally controlled, low-power consumption shutdown mode, as well as an internal thermal shutdown protection mechanism. The unity-gain stable UTC LM4880 can be configured by external gain-setting resistors. FEATURES * No bootstrap capacitors or snubber circuits are necessary * Unity-gain stable * External gain configuration capability *Pb-free plating product number: LM4880L APPLICATIONS * Personal Computers * CD-ROM Players * Headphone Amplifier ORDERING INFORMATION Ordering Number Normal Lead Free Plating LM4880-D08-T LM4880L-D08-T LM4880-SH2-R LM4880L-SH2-R LM4880-SH2-T LM4880L-SH2-T www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd. Package Packing DIP-8 HSOP-8 HSOP-8 Tube Tape Reel Tube 1 of 11 QW-R502-033,B LM4880 PIN CONFIGURATION PIN DESCRIPTION PIN NO 1 2 3 4 PIN NAME OUT A IN A BYPASS GND CMOS IC I/O O I I 5 SHUTDOWN I 6 7 8 IN B OUT B VDD I O DESCRIPTION Channel A output Channel A audio input Connect to internal voltage divider for middle supply bias Ground Shutdown mode control input, high active, place LM4880 into shutdown mode, when held high Channel B audio input Channel B output Supply voltage UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 11 QW-R502-033,B LM4880 CMOS IC ABSOLUTE MAXIMUM RATINGS (Note 2) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD 6.0 V Input Voltage VIN -0.3 ~ VDD+0.3 V ESD Susceptibility (Note 3) 3500 V ESD ESD Susceptibility (Note 4) 250 V Power Dissipation (Note 5) PD Internally limited Junction Temperature TJ 150 °C Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C 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 Thermal Resistance From Junction to Ambient Thermal Resistance From Junction to Case SYMBOL DIP-8 HSOP-8 DIP-8 HSOP-8 θJC UNIT °C/W °C/W OPERATING RATINGS PARAMETER Supply Voltage Temperature Range (TMIN≤Ta≤TMAX) θJA RATINGS 107 42.3 37 12 SYMBOL VDD Ta RATINGS 2.7 ~ 5.5 -40 ~ +85 UNIT V °C ELECTRICAL CHARACTERISTICS (Note 1,2) (Ta=25°C , The following specifications apply for VDD=5V, f=1kHz unless otherwise specified) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Supply Voltage VDD 2.7 5.5 V Quiescent Power Supply Current IDD VIN=0V, IOUT=0A 3.6 6.0 mA Shutdown Current ISHDN VPIN5=VDD 0.7 5 µA Output Offset Voltage VO(OFF) VIN=0V 5 50 mV THD=0.1%(max) RL=8Ω 200 250 mW , f=1KHz RL=32Ω 85 mW Output Power POUT THD+N=10%, RL=8Ω 325 mW f=1KHz RL=32Ω 110 mW RL=8Ω, POUT=200mW, f=1KHz 0.03 % Total Harmonic Distortion + Noise THD+N RL=32Ω, POUT=75mW, f=1KHz 0.02 % Cb=1.0µF Power Supply Rejection Ratio PSRR 50 dB VRIPPLE=200mVrms, f=100Hz Note 1: All voltages are measured with respect to the ground pin, unless otherwise specified. Note 2: Absolute Maximum Ratings indicate limits beyond which damage may occur. Operating ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Electrical Characteristics state DC and AC electrical specifications under particular test conditions which guarantee specific performance limits. This assumes that the device is within the operating ratings. Specifications are not guaranteed for parameters where no limit is given, however, the typical value is a good indication of device performance. Note 3: Human body model, 100 pF discharged through a 1.5 kΩ resistor. Note 4: Machine model, 220 pF ~ 240 pF discharged through all pins. Note 5: The maximum power dissipation must be derated at elevated temperatures and is dictated by TJMAX, θJA, and the ambient temperature TA. The maximum allowable power dissipation is PDMAX = (TJMAX - TA) /θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For the UTC LM4880, TJMAX = 15℃, and the typical junction-to-ambient thermal resistance is 170℃/W for SOP-8 package and 107℃/W for DIP-8 package. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 11 QW-R502-033,B LM4880 CMOS IC TYPICAL APPLICATION VDD Audio Input *Ci CS 0.1μF RF 20kΩ 2 + + 8 IN A - Ri 20kΩ + Audio Input *Ci + + Ri 20kΩ 5 Shutdown 3 Bypass Bias RL 8Ω or 32Ω 15kΩ 50kΩ CB 1.0μF *Co OUT A 1 + VDD/2 50kΩ *Co OUT B 7 + + 6 IN B 15kΩ RF 20kΩ RL 8Ω or 32Ω GND 4 Figure 1.Typical Audio Amplifier Application Circuit EXTERNAL COMPONENTS DESCRIPTION (Figure 1) COMPONENTS 1. Ri 2. Ci 3. 4. 5. RF Cs CB 6. CO FUNCTIONAL DESCRIPTION Inverting input resistance which sets the closed-loop gain in conjunction with RF. This resistor also forms a high pass filter with Ci at fc = 1/(2πRiCi). Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a high pass filter with Ri at fc = 1/(2πRiCi). Feedback resistance which sets closed-loop gain in conjunction with Ri. Supply bypass capacitor which provides power supply filtering. Bypass pin capacitor which provides half-supply filtering. Output coupling capacitor which blocks the DC voltage at the amplifier’s output. Forms a high pass filter with RL at fo = 1/(2πRLCo). UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 11 QW-R502-033,B LM4880 CMOS IC AUTOMATIC SHUTDOWN CIRCUIT VDD AUDIO INPUT 20kΩ 0.1μF 2 8 UTC 1 0.33μF 20kΩ LM4880 3 5 VDD + + 4 Rsd 1μF 100kΩ + - HEADPHONE JACK 100μF + RO 1kΩ Rp 1MΩ TO CHANNEL B OUTPUT(PIN 7) VIA COUPLING CAPACITOR Figure 2. Automatic Shutdown Circuit AUTOMATIC SWITCHING CIRCUIT V DD AUDIO INPUT 20kΩ 20kΩ + 0.33μF 1μF 0.1μF 2 8 - UTC 1 LM4880 3 5 + 4 + 100µF + VDD Rsd 100kΩ HEADPHONE JACK RO 1kΩ Rp 1MΩ TO UTC LM4880 CHANNEL B OUTPUT (PIN 7) VIA COUPLING CAPACITOR 20kΩ V DD 0.1µF 20kΩ + 0.33μF 1μF + 4 3 6 + LM4861 2 7 1 5 8 RL 8Ω Figure 3.Automatic Switching Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 11 QW-R502-033,B LM4880 CMOS IC TYPICAL CHARACTERISTICS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 11 QW-R502-033,B LM4880 CMOS IC TYPICAL CHARACTERISTICS(Cont.) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 11 QW-R502-033,B LM4880 CMOS IC TYPICAL CHARACTERISTICS(Cont.) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 11 QW-R502-033,B LM4880 TYPICAL CHARACTERISTICS(Cont.) Channel Separation 0.0 20.00 Channel B to A -60.00 -80.00 -100.0 Channel A to B 30.00 40.00 50.00 70.00 Ri =10k Ω RF =20kΩ 90.00 20 100 1k Frequency (Hz) 100.0 10k 20k 100 20 Noise Floor 1m Ri=RF=20KΩ V PIN3=2.5V(FORCED) 60 50 PSRR (dB) 100μ 10 μ 40 CB 30 F .0μ =1 W II F 1μ 0. F 0μ 1. 20 C 0 II μ .1 F B= VDD =5.0V VRIPPLE =200mVrms 0dB=200mVrms RL =8 Ω 10 C B =0.1μF 1μ 20 100 100 1k Frequency (Hz) 0 10k 20k 10 22 5 5.0 40 20 90 45 Supply Current (mA) 135 Phase 10k 100k Supply Current vs Supply Voltage V PIN5 =0V R L= 4.0 Phase (o) Gain 1k 8 4.5 180 80 100 Frequency (Hz) Open Loop Frequency Response 60 10k 20k 1k Frequency (Hz) Power Supply Rejection Ratio 70 RL=8Ω G V=1 BW<22kHz Noise Floor (μV) Ri =RF =10kΩ 60.00 80.00 -120.0 -140.0 0dB=1.3Vrms R L=8Ω V DD =5.0V V PIN3=5.0V 10.00 Output Attenuation (dB) Output Level (dB) -40.00 Output Attenuatin in Shutdown Mode 0.0 RL=8Ω POUT =200mW 0dB=200mW GV=1 C B=1.0μF -20.00 Gain (dB) CMOS IC 3.5 3.0 2.5 2.0 1.5 1.0 0.5 0 10 100 1k 10k 100k 1M Frequency (Hz) 0 10M 100M UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 0.0 2.5 3.0 3.5 4.0 4.5 Supply Voltage (V) 5.0 5.5 9 of 11 QW-R502-033,B LM4880 CMOS IC TYPICAL CHARACTERISTICS(Cont.) Frequency Response vs. Output Capacitor Size Frequency Response vs. Output Capacitor Size 5.0000 5.0000 GV =-1, Ci =10μF Ri=20kΩ, RL =8Ω 0.0 Co=220μF -5.000 Output Level (dB) Output Level (dB) 0.0 Co=470μF Co=1000μF -10.00 Co=2200μF -15.00 -20.00 GV =-1, Ci =10μF Ri=20kΩ, RL=32Ω Co=47μF -5.000 Co=100μF Co=220μF -10.00 Co=470μF -15.00 20 100 10k 1k -20.00 100k 20 100 Frequency (Hz) Frequency Response vs Input Capacitor Size 100k Typical Application Frequency Response 0.0 0.0 Ci=0.1μF -5.000 Output Level (dB) Output Level (dB) 10k 5.0000 5.0000 Ci=0.22μF Ci=0.47μF -10.00 Ci=1.0μF Gv=-1 Ri=20k Ω CoUT=10000μF RL=8 Ω -15.00 -20.00 1k Frequency (Hz) 20 100 1k 10k 100k Frequency (Hz) i Ci=0.1μF Co=470μF -5.000 Ci=1.0μF Co=470μF -10.00 -15.00 -20.00 Gv=-1 Ri=20kΩ RL=8Ω 20 100 1k 10k 100k Frequency (Hz) Typical Application Frequency Response 5.0000 Output Level (dB) 0.0 Ci=1.0μF Co=220μ F -5.000 Ci=0.1μF Co=220μF -10.00 -15.00 -20.00 Gv=-1 Ri=20kΩ RL=32Ω 20 100 1k 10k 100k Frequency (Hz) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 10 of 11 QW-R502-033,B LM4880 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 11 of 11 QW-R502-033,B