UTC LM4880G-SH2-R Dual 250mw audio power amplifier with shutdown mode Datasheet

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
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Copyright © 2014 Unisonic Technologies Co., Ltd.
HSOP-8
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
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
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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
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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
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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).
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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
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TYPICAL CHARACTERISTICS
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Output Power (mW)
THD+N (%)
THD+N (%)
THD+N (%)
THD+N (%)
TYPICAL CHARACTERISTICS(Cont.)
Output Power (mW)

CMOS IC
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TYPICAL CHARACTERISTICS(Cont.)
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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
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0.0
2.5
3.0
3.5
4.0
4.5
Supply Voltage (V)
5.0
5.5
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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)
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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.
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