LM4880-SH2-T

UNISONIC TECHNOLOGIES CO., LTD LM4880 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. CMOS IC 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 Package DIP-8 HSOP-8 HSOP-8 Packing Tube Tape Reel Tube www.unisonic.com.tw Copyright © 2007 Unisonic Technologies Co., Ltd. 1 of 11 QW-R502-033,B LM4880 PIN CONFIGURATION CMOS IC PIN DESCRIPTION PIN NO 1 2 3 4 5 6 7 8 PIN NAME OUT A IN A BYPASS GND SHUTDOWN IN B OUT B VDD I/O O I I I 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 ABSOLUTE MAXIMUM RATINGS (Note 2) CMOS IC 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 DIP-8 HSOP-8 DIP-8 HSOP-8 SYMBOL θJA θJC RATINGS 107 42.3 37 12 RATINGS 2.7 ~ 5.5 -40 ~ +85 UNIT °C/W °C/W OPERATING RATINGS PARAMETER Supply Voltage Temperature Range (TMIN≤Ta≤TMAX) SYMBOL VDD Ta 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 TYPICAL APPLICATION CMOS IC VDD RF 20kΩ + Ri 20kΩ 50kΩ 5 3 Shutdown Bypass 50kΩ + 6 IN B 15kΩ RF 20kΩ GND 4 RL 8 Ω or 32Ω *Co OUT B 7 + Bias VDD/2 2 IN A CS 0.1 F μ + 8 + 15kΩ RL 8 Ω or 32Ω *Co OUT A 1 + Audio Input *Ci CB 1.0μF Audio Input *Ci Ri 20kΩ + + Figure 1.Typical Audio Amplifier Application Circuit EXTERNAL COMPONENTS DESCRIPTION (Figure 1) COMPONENTS 1. 2. 3. 4. 5. 6. Ri Ci RF Cs CB 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 AUTOMATIC SHUTDOWN CIRCUIT VDD AUDIO INPUT 20kΩ + 2 0.1μF HEADPHONE JACK 100μF + RO 1kΩ Rp 1MΩ TO CHANNEL B OUTPUT(PIN 7) VIA COUPLING CAPACITOR CMOS IC 8 UTC 1 0.33μF 20kΩ LM4880 3 5 VDD + + 4 Rsd 1 μF 100kΩ Figure 2. Automatic Shutdown Circuit AUTOMATIC SWITCHING CIRCUIT V DD AUDIO INPUT 20kΩ 0.1μF 2 UTC 1 LM4880 3 5 + 4 + Rsd 100kΩ 8 + 0.33μF 20kΩ 100µF + VDD HEADPHONE JACK 1μ F RO 1kΩ Rp 1MΩ TO UTC LM4880 CHANNEL B OUTPUT (PIN 7) VIA COUPLING CAPACITOR 20kΩ V DD 0.1µF + 0.33μF 20kΩ 4 3 6 + LM4861 5 8 1μF + RL 8Ω 27 1 Figure 3.Automatic Switching Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 11 QW-R502-033,B LM4880 TYPICAL CHARACTERISTICS CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 11 QW-R502-033,B LM4880 TYPICAL CHARACTERISTICS(Cont.) CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 7 of 11 QW-R502-033,B LM4880 TYPICAL CHARACTERISTICS(Cont.) CMOS IC UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 8 of 11 QW-R502-033,B LM4880 TYPICAL CHARACTERISTICS(Cont.) CMOS IC 0.0 -20.00 -40.00 -60.00 -80.00 -100.0 Channel Separation RL=8 Ω POUT =200mW 0dB=200mW GV=1 C B=1.0μ F Channel B to A 0.0 10.00 20.00 Output Attenuation (dB) 30.00 40.00 50.00 60.00 70.00 80.00 90.00 20 100 1k Frequency (Hz) 10k 20k 100.0 20 Output Attenuatin in Shutdown Mode 0dB=1.3Vrms R L=8Ω V DD =5.0V V PIN3=5.0V Output Level (dB) Ri =RF =10kΩ Channel A to B -120.0 -140.0 Ri =10k Ω RF =20kΩ 100 Ri=RF=20KΩ 10k 20k 1k Frequency (Hz) 1m RL=8 Ω G V=1 BW