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 APPLICATIONS * Personal Computers * CD-ROM Players * Headphone Amplifier ORDERING INFORMATION Ordering Number Lead Free LM4880L-D08-T - Halogen Free LM4880G-D08-T LM4880G-SH2-R Package Packing DIP-8 HSOP-8 Tube Tape Reel MARKING DIP-8 www.unisonic.com.tw Copyright © 2014 Unisonic Technologies Co., Ltd. HSOP-8 1 of 11 QW-R502-033. E LM4880 CMOS IC PIN CONFIGURATION PIN DESCRIPTION PIN NO 1 2 3 4 PIN NAME OUT A IN A BYPASS GND 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. E LM4880 CMOS IC ABSOLUTE MAXIMUM RATINGS (Note 1) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VDD 6.0 V Input Voltage VIN -0.3 ~ VDD+0.3 V ESD Susceptibility (Note 2) 3500 V ESD ESD Susceptibility (Note 3) 250 V Power Dissipation (Note 4) PD Internally limited Junction Temperature TJ 150 °C Operating Temperature TOPR -40 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C Notes: 1. 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. 2. Human body model, 100 pF discharged through a 1.5 kΩ resistor. 3. Machine model, 200 pF discharged through all pins. 4. 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. THERMAL DATA PARAMETER Junction to Ambient 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 (TA=25°C, VDD=5V, f=1kHz unless otherwise specified) PARAMETER Supply Voltage Quiescent Power Supply Current Shutdown Current Output Offset Voltage SYMBOL VDD IDD ISHDN VO(OFF) TEST CONDITIONS MIN 2.7 VIN=0V, IOUT=0A VPIN5=VDD VIN=0V 200 RL=8Ω RL=32Ω Output Power POUT RL=8Ω THD+N=10%, f=1KHz RL=32Ω RL=8Ω, POUT=200mW, f=1KHz Total Harmonic Distortion + Noise THD+N RL=32Ω, POUT=75mW, f=1KHz Power Supply Rejection Ratio PSRR CB=1.0μF, VRIPPLE=200mVRMS, f=100Hz Note: All voltages are measured with respect to the ground pin, unless otherwise specified. THD=0.1%(MAX), f=1KHz UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw TYP 3.6 0.7 5 250 85 325 110 0.03 0.02 50 MAX UNIT 5.5 V 6.0 mA 5 µA 50 mV mW mW mW mW % % dB 3 of 11 QW-R502-033. E LM4880 CMOS IC TYPICAL APPLICATION Audio Input CI + CS + 0.1µF RF 20kΩ 8 2 IN A RI 20kΩ CB + 1.0µF OUT A 1 +CO + 5 Shutdown Bias Audio Input CI + VDD 50kΩ VDD/2 15kΩ RL 8Ω or 32Ω 3 Bypass RI 20kΩ 50kΩ OUT B 7 +CO + 6 IN B RF 20kΩ - 15kΩ RL 8Ω or 32Ω GND 4 Fig. 1 Typical Audio Amplifier Application Circuit EXTERNAL COMPONENTS DESCRIPTION (Fig. 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. E LM4880 CMOS IC AUTOMATIC SHUTDOWN CIRCUIT VDD 20kΩ AUDIO INPUT 0.1µF 28 UTC + 0.33µF 20kΩ 1 LM4880 1µF 3+ + 4 5 HEADPHONE JACK 100µF + RO 1kΩ RP 1MΩ VDD RSD 100kΩ Fig. 2 Automatic Shutdown Circuit TO CHANNEL B OUTPUT(PIN 7) VIA COUPLING CAPACITOR AUTOMATIC SWITCHING CIRCUIT VDD AUDIO INPUT 20kΩ 0.1µF 20kΩ + 2- 8 UTC LM4880 3 0.33µF 1µF + + 100μF + 1 5 4 VDD RSD 100kΩ RO 1kΩ RP 1MΩ TO UTC LM4880 CHANNEL B OUTPUT (PIN 7) VIA COUPLING CAPACITOR 20kΩ VDD 20kΩ + 0.33µF 1µF + 4 6 HEADPHONE JACK 0.1μF 5 3 PA4871 8 + 1 27 RL 8Ω Fig. 3 Automatic Switching Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 11 QW-R502-033. E LM4880 CMOS IC TYPICAL CHARACTERISTICS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 11 QW-R502-033. E LM4880 Output Power (mW) THD+N (%) THD+N (%) THD+N (%) THD+N (%) TYPICAL CHARACTERISTICS(Cont.) Output Power (mW) CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 11 QW-R502-033. E LM4880 CMOS IC TYPICAL CHARACTERISTICS(Cont.) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 11 QW-R502-033. E 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=10kΩ RF=20kΩ 90.00 20 100 1k Frequency (Hz) 100.0 10k 20k 20 100 Noise Floor 1m RI=RF=20KΩ 1k Frequency (Hz) VPIN3=2.5V(FORCED) 60 50 PSRR (dB) 100µ 10µ 40 C 30 20 F 0µ 1. = B C II F 1µ 0. µF .0 =1 1µ 0. II F B VDD=5.0V VRIPPLE=200mVRMS 0dB=200mVRMS RL=8Ω 10 CB=0.1µF 1µ 20 100 100 1k Frequency (Hz) 0 10k 20k 10 5.0 225 4.5 180 135 Phase 40 20 90 45 Supply Current (mA) Gain 1k 10k 100k Supply Current vs Supply Voltage VPIN5=0V RL=∞ 4.0 Phase (o) 80 100 Frequency (Hz) Open Loop Frequency Response 60 10k 20k Power Supply Rejection Ratio 70 RL=8Ω GV=1 BW<22kHz Noise Floor (µV) RI=RF=10kΩ 60.00 80.00 -120.0 -140.0 0dB=1.3Vrms RL=8Ω VDD=5.0V VPIN3=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 CB=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. E LM4880 CMOS IC TYPICAL CHARACTERISTICS(Cont.) Frequency Response vs. Output Capacitor Size 5.0000 Frequency Response vs. Output Capacitor Size 5.0000 GV=-1, CI=10µF RI=20kΩ, RL=8Ω 0.0 GV=-1, CI=10µF RI=20kΩ, RL=32Ω 0.0 CO=220µF -5.000 CO=47µF -5.000 CO=470µF CO=1000µF -10.00 CO=100µF CO=220µF -10.00 CO=470µF CO=2200µF -15.00 -20.00 -15.00 20 100 10k 1k 100k -20.00 20 100 Frequency (Hz) Frequency Response vs Input Capacitor Size 10k 100k Typical Application Frequency Response 5.0000 5.0000 0.0 0.0 i CI=0.1µF -5.000 CI=0.1µF CO=470µF -5.000 CI=0.22µF CI=0.47µF -10.00 CI=1.0µF CO=470µF -10.00 CI=1.0µF GV=-1 RI=20kΩ COUT=10000µF RL=8Ω -15.00 -20.00 1k Frequency (Hz) 20 100 1k 10k -15.00 100k Frequency (Hz) -20.00 GV=-1 RI=20kΩ RL=8Ω 20 100 1k 10k 100k Frequency (Hz) Typical Application Frequency Response 5.0000 0.0 CI=1.0µF CO=220µF -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. E 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. E