LM4880-D08-T资料

UNISONIC TECHNOLOGIES CO., LTD

LM4880 CMOS IC DUAL 250mW AUDIO POWER AMPLIFIER WITH SHUTDOWN MODE

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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.

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FEATURES

*Pb-free plating product number: LM4880L

*󰀁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

Package Packing Normal Lead Free Plating

LM4880-D08-T LM4880L-D08-T DIP-8 Tube LM4880-SH2-R LM4880L-SH2-R HSOP-8 Tape Reel LM4880-SH2-T LM4880L-SH2-T HSOP-8 Tube

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LM4880 CMOS IC

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PIN CONFIGURATION

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PIN DESCRIPTION

PIN NO PIN NAME 1 OUT A 2 IN A 3 BYPASS 4 GND I/O DESCRIPTION O Channel A output

I Channel A audio input

I Connect to internal voltage divider for middle supply bias Ground

Shutdown mode control input, high active, place LM4880 into shutdown 5 SHUTDOWN I mode, when held high

6 IN B I Channel B audio input 7 OUT B O Channel B output 8 VDD Supply voltage

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LM4880 CMOS IC

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ABSOLUTE MAXIMUM RATINGS (Note 2)

PARAMETER SYMBOLRATINGS 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 SYMBOLRATINGS UNIT DIP-8107

Thermal Resistance From Junction to Ambient θJA °C/W

HSOP-842.3

DIP-8 37 Thermal Resistance From Junction to Case θJC °C/W

HSOP-812

󰂄 OPERATING RATINGS

PARAMETER SYMBOLRATINGS UNIT Supply Voltage VDD 2.7 ~ 5.5 V Temperature Range (TMIN≤Ta≤TMAX) Ta -40 ~ +85 °C

󰂄 ELECTRICAL CHARACTERISTICS (Note 1,2)

(Ta=25°C , The following specifications apply for VDD=5V, f=1kHz unless otherwise specified)

PARAMETER SYMBOLTEST CONDITIONS MIN TYP MAXUNIT

Supply Voltage VDD 2.7 5.5 V Quiescent Power Supply Current IDD VIN=0V, IOUT0A 3.6 6.0 mA Shutdown Current ISHDN VPIN5=VDD 0.7 5 µA Output Offset Voltage VO(OFF) VIN0V 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 mWf=1KHz RL=32Ω 110 mWRL=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.

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LM4880 CMOS IC

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TYPICAL APPLICATION

VDDRF20k󰆸+Ri20k󰆸50k󰆸53CB1.0 F󰇄AudioInput*CiRi20k󰆸+50k󰆸+6IN B-15k󰆸RF20k󰆸GND4RL

8󰆸or32󰆸

*CoOUT B7+ShutdownBypassBiasVDD/22IN ACS+0.1󰇄FAudioInput*Ci8-+15k󰆸RL

8󰆸or32󰆸

*CoOUT A1++Figure 1.Typical Audio Amplifier Application Circuit

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EXTERNAL COMPONENTS DESCRIPTION (Figure 1)

COMPONENTS FUNCTIONAL DESCRIPTION Inverting input resistance which sets the closed-loop gain in conjunction with RF. This resistor 1. Ri also forms a high pass filter with Ci at fc = 1/(2󰇈RiCi). Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also

2. Ci creates a high pass filter with Ri at fc = 1/(2󰇈RiCi). 3. RF 4. Cs 5. CB 6. CO

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/(2󰇈RLCo).

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LM4880 CMOS IC

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VDDAUDIOINPUT20k󰆸+2-80.1󰇄FHEADPHONE JACK100󰇄F+RO1k󰆸Rp1M󰆸TO CHANNEL BOUTPUT(PIN 7)VIA COUPLING CAPACITOR

AUTOMATIC SHUTDOWN CIRCUIT

UTC 10.33󰇄F20k󰆸LM488035VDD++4Rsd1󰇄F100k󰆸Figure 2. Automatic Shutdown Circuit

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AUTOMATIC SWITCHING CIRCUIT

VDDAUDIOINPUT20k󰆸0.1󰇄F2UTC 1LM488035+4+Rsd100k󰆸-8+0.33󰇄F20k󰆸100µF+VDDHEADPHONE JACK1󰇄FRp1M󰆸RO1k󰆸20kΩVDD0.1µFTO UTC LM4880 CHANNEL B OUTPUT (PIN 7) VIA COUPLING CAPACITOR+0.33󰇄F20k󰆸65 LM486138+1274-RL8󰆸1󰇄F+Figure 3.Automatic Switching Circuit

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LM4880 CMOS IC

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TYPICAL CHARACTERISTICS

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LM4880 CMOS IC

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TYPICAL CHARACTERISTICS(Cont.)

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LM4880 CMOS IC

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TYPICAL CHARACTERISTICS(Cont.)

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LM4880 CMOS IC

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TYPICAL CHARACTERISTICS(Cont.)

0.0-20.00-40.00-60.00-80.00-100.0

Channel A to B-120.0-140.0

Channel Separation

RL=8󰆸POUT=200mW0dB=200mWGV=1CB=1.0󰇄FChannel B to A0.010.0020.00Output Attenuation (dB)30.0040.0050.0060.0070.0080.0090.00

20

100

1k

Frequency (Hz)

10k20k

100.0

20

Output Attenuatin in Shutdown Mode

0dB=1.3VrmsRL=8󰆸VDD=5.0VVPIN3=5.0VOutput Level (dB)Ri=RF=10k󰆸Ri=10k󰆸RF=20k󰆸100

Ri=RF=20K󰆸10k20k

1k

Frequency (Hz)

1m

RL=8󰆸GV=1BW<22kHz100󰇄Noise Floor

70Power Supply Rejection Ratio

VPIN3=2.5V(FORCED)6050PSRR (dB)40302010CB=0.1󰇄FCBNoise Floor (󰇄V)WII F 󰇄.0=11F1󰇄.0F10󰇄CB=󰇄.10 IIF 󰇄.0VDD=5.0VVRIPPLE=200mVrms0dB=200mVrmsRL=8󰆸1k10k100k1󰇄201001kFrequency (Hz)10k20k010100Frequency (Hz)100

Open Loop Frequency Response2251805.04.5Supply Current vs Supply VoltageVPIN5=0VRL=880

Gain4.0Supply Current (mA)3.53.02.52.01.51.00.5Gain (dB)60

40

Phase9020450

101001k

10k100k1MFrequency (Hz)

010M100M

Phase (o)1350.02.5

3.0

3..04.5Supply Voltage (V)

5.05.5

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LM4880 CMOS IC

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TYPICAL CHARACTERISTICS(Cont.)

Frequency Response vs. Output Capacitor Size

5.0000

GV=-1, Ci=10󰇄FRi=20k󰆸󰀍RL=8󰆸Frequency Response vs. Output Capacitor Size

5.0000GV=-1, Ci=10󰇄FRi=20k󰆸󰀍RL=32󰆸0.00.0Output Level (dB)Output Level (dB)󰇄Co=220 F󰇄Co=47 F-5.000

󰇄Co=470 F󰇄Co=1000 F󰇄Co=2200 F-5.000󰇄Co=100 F󰇄Co=220 F󰇄Co=470 F-10.00-10.00-15.00-15.00-20.00

201001k10k100k-20.00201001k10k100kFrequency (Hz)Frequency Response vs Input Capacitor Size5.0000

5.0000Frequency (Hz)Typical Application Frequency Response0.00.0Output Level (dB)Output Level (dB)󰇄Ci=0.1 F-5.000

󰇄Ci=0.22 F󰇄Ci=0.47 F󰇄Ci=1.0 F-5.000󰇄Ci=0.1 F󰇄FCo=470 i-10.00-10.00󰇄Ci=1.0 F󰇄Co=470 F-15.00

-20.00

Gv=-1Ri=20k󰆸󰇄CoUT=10000 FRL=8󰆸-15.00Gv=-1Ri=20k󰆸RL=8󰆸201001k10k100k-20.00201001k10k100kFrequency (Hz)Typical Application Frequency Response5.0000

Frequency (Hz)0.0

Output Level (dB)-5.000

󰇄Ci=1.0 F󰇄FCo=220 󰇄Ci=0.1 F󰇄FCo=220 -10.00

-15.00

Gv=-1Ri=20k󰆸RL=32󰆸-20.00

201001k10k100k

Frequency (Hz)

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LM4880 CMOS IC

UTC assumes no responsibility for equipment failures that result from using products at values thatexceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, orother parameters) listed in products specifications of any and all UTC products described or containedherein. UTC products are not designed for use in life support appliances, devices or systems wheremalfunction of these products can be reasonably expected to result in personal injury. Reproduction inwhole or in part is prohibited without the prior written consent of the copyright owner. The informationpresented in this document does not form part of any quotation or contract, is believed to be accurateand reliable and may be changed without notice.

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