3544L-D08-T [UTC]
HEADPHONE AMPLIFIER FOR CD-ROMS; 耳机放大器的CD-ROM
| 型号： | 3544L-D08-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | HEADPHONE AMPLIFIER FOR CD-ROMS |
| 文件： | 总10页 (文件大小：334K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
3544
LINEAR INTEGRATED CIRCUIT
HEADPHONE AMPLIFIER FOR
CD-ROMS
DESCRIPTION
As a dual headphone amplifier the UTC 3544 is digital-source.
The UTC 3544 has a steady gain of 6dB and so it is unnecessary for
external gain setting. The UTC 3544 has internal mute function so
that it is greatly simplified for prevention of the popping sound when
power is turned on and off. To prevent damage from short circuits
the UTC 3544 is equipped with thermal shutdown circuit.
FEATURES
* Internal mute function to prevent popping sounds when *the power
is turned on and off.
* Built-in thermal shutdown circuit (150°C) to prevent *damage to the
IC if a short circuit occurs.
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
3544L-D08-T
3544L-S08-R
Halogen Free
3544G-D08-T
3544G-S08-R
DIP-8
Tube
SOP-8
Tape Reel
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Copyright © 2009 Unisonic Technologies Co., Ltd
QW-R107-040,C
3544
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTIONS
PIN NO. PIN NAME
I/O
PIN VOLTAGE
2.1V
INTERNAL EQUIVALENT CIRCUIT
FUNCTION
Vcc
1
7
OUT1
OUT2
O
O
Output pin
1
7
2.1V
10k
(VCC=5V)
Mute control pin
(set to low for
prevention of
popping noise
when power is
turned on and off).
0.1V
(When open)
2
MUTE
I
Operating: High
Muting: Low(open)
Vcc
3
5
IN1
IN2
I
I
2.1V
3
5
Input pin
180k
BIAS
2.1V
(VCC=5V)
Bias pin (the
external 47μF
capacitor also
serves as the
anti-pop time
constant, therefore
make the proper
considerations be
changing it).
2.1V
(VCC=5V)
6
BIAS
I/O
4
8
GND
VCC
I
I
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3544
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
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LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
VMAX
RATINGS
7.0
UNIT
V
Applied Voltage
Power Dissipation
Derate above 25°C
450
mW
mW/°C
°C
PD
4.5
Operating Temperature
Storage Temperature
TOPR
TSTG
-25 ~ +75
-55 ~ +125
°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.
RECOMMENDED OPERATING CONDITIONS (Ta=25°C)
PARAMETER
SYMBOL
VCC
MIN
2.8
TYP
MAX
6.5
UNIT
V
Power Supply Voltage
ELECTRICAL CHARACTERISTICS (Ta=25°C, VCC=5.0V, RL=32Ω, VIN= -6dBV, f=1kHz)
PARAMETER
SYMBOL
VTM
CONDITIONS
MIN TYP MAX UNIT
Mute Pin Control Voltage
Quiescent Current
0.3
4
0.7
7
1.6
10
8
V
mA
dB
IQ
VIN=0Vrms
Voltage Gain
Gv
4
6
Voltage Gain Difference Between Channels
Total Harmonic Distortion
Rated Output 1
△Gv(DIFF)
THD
Po1
-0.5
0
0.5
0.1
dB
BW=20~20kHz
0.02
31
62
-93
90
80
57
%
RL=32Ω,THD<0.1%
RL=16Ω,THD<0.1%
BW=20~20kHz,Rg=0Ω
Rg=0Ω
25
50
mW
mW
dBV
dB
Rated Output 2
Po2
Output Noise Voltage
Channel Separation
Mute Attenuation
eN
-85
CS
82
70
50
ATT
RR
Rg=0Ω
dB
Ripple Rejection
fRR=100Hz, VRR= -20dBV
dB
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3544
LINEAR INTEGRATED CIRCUIT
MEASUREMENT CIRCUIT
32
1
2
1
2
SW5
330μ
SW7
+
16
V
V2AC
VIN2
1μ
+
47μ
+
Vcc
IN2
OUT2
BIAS
10μ
A
IQ
7
8
6
5
SW8B
BIAS
+
TSD
90K
90K
6dB
1
2
SW8A
VRR
+
6dB
MUTE
2
Vcc
1
32
16
1
3
4
GND
MUTE
IN1
OUT1
+
SW1
VTM
2
1
2
330μ
SW3
VIN1
1μ
V
V1AC
MEASUREMENT CONDITIONS
SW TABLE
SIGNAL
MONITOR
IQ
CONDITIONS
SW1
1
SW3
1
SW5
1
SW7
SW8A
2
SW8B
IQ
1
OFF
VTM
f=1kHz,VIN1/2=-6dBV,
TM=1.6V
GVC
△Gvc
THD
1
2
2
1
2
ON
V1AC,V2AC
V
GVC1 – GVC2
fin=1kHz,VIN1/2= -6dBV,
1
1
2
2
2
2
1
1
2
2
ON
ON
V1AC,V2AC
V1AC,V2AC
V
TM=1.6V
fin=1kHz,VIN1/2= -6dBV,
TM=1.6V
fin=1kHz,VIN1/2= -6dBV,
TM=1.6V
Po1
V
Po2
VNO
2
1
2
1
2
1
2
1
2
2
ON
ON
V1AC,V2AC
V1AC,V2AC
V
fin=1kHz,VIN2= -6dBV,
TM=1.6V
1
1
1
2
2
1
1
1
2
2
ON
ON
V1AC,V2AC
V
CS
V1AC,V2AC fin=1kHz,VIN1= -6dBV,
TM=1.6V
fin=1kHz,VIN1/2= -6dBV,
TM=0.3VB
V
ATT
RR
1
1
2
1
2
1
1
1
2
1
ON
ON
V1AC,V2AC
V
V1AC,V2AC VRR= -20dBV, fRR=100Hz
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3544
LINEAR INTEGRATED CIRCUIT
CIRCUIT OPERATION
Rising edge timing
A
Rising
period
A
Descending
period
Play period
B
C
Vcc
OUT
VMUTE
A: MUTE period(use with MUTE=Low to prevent the popping noise when the power is turned on and off ).
B: MUTE release time(used to prevent the popping noise at the release of MUTE with the external C 2 and R2
and therefore possesses a time constant,so be careful of the timing).
C: MUTE start time(also possesses a time constant like the MUTE release time).
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3544
LINEAR INTEGRATED CIRCUIT
APPLICATION EXAMPLE
1μ
C6
47μ
BIAS
+
VIN2
Vcc
C3
IN2
OUT2
Vcc
+
+
7
8
6
5
330μ
C1
BIAS
TSD
90K
6dB
+
+
6dB
90K
MUTE
1
2
3
4
C7
OUT1
MUTE
IN1
GND
+
330μ
1μ
R2
VMUTE
VIN1
100k
1μ
C2
C5
H:Active
L:Mute
EXPLANATION OF EXTERNAL COMPONENTS
(1)Input coupling capacitor (C3 and C5)
First determined by the low-band cut-off frequency. Because the input impedance is 180kΩ for this IC, it can be
determined by this formula
C3(C5)=1/(2π×180kΩ×f)
But make sure taking the fluctuations, ambient temperature, etc into consideration. A multi-layered ceramic
capacitor is recommended.
(2)BIAS capacitor(C6)
47μF when Vcc=5V, and 33μF when Vcc=3V. Before changing these values take the sufficient considerations.It is
because the electrical characteristics will be adversely affected and popping noise may occur if the capacitance is
lowered too much.
(3)MUTE pin for anti-pop measures (R2 and C2)
An impedance of 190kΩ must be possessed with respect to GND, so the MUTE mode may become unable to be
released if R2 is increased too much.
(4)Output coupling capacitor(C1 and C7)
Also determined by the low-band cutoff frequency. Like the output load resistance value RL (a resistor Rx will be
inserted ,assuming that for output protection or current limiting), it can be calculated by this formula
C1(C7)=1/(2π×(RL+Rx) ×f)
(5)Input gain adjustment resistor(R3 and R4)
External resistors R3 and R4 can perform input gain adjustment .The desired gain can be calculated by this
formula
Gv=6+20log(90kΩ/(90kΩ+R3))[dB]
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3544
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Quiescent Current vs. Power Supply Voltage
Pin DC Current vs. Power Supply Voltage
10
5
4
5
Ta=25℃
RL=32Ω
Ta=25℃
RL=32Ω
9
8
7
4
MUTE: OFF
3
2
1
0
6
3
2
5
4
3
2
MUTE: ON
1
0
1
0
2
4
6
8
10
0
0
2
4
6
8
10
Supply Voltage, Vcc (V)
Supply Voltage, Vcc(V)
Output Voltage vs. Mute Control Voltage
Voltage Gain vs. Frequency
8
6
4
2
0
10
0
Ta=25℃
RL=32Ω
Vcc=5V
VIN=0dBV
f=1kHz
-10
-20
-30
-2
-4
-6
-40
-50
-60
-70
-80
-90
-8
-10
-12
Ta=25℃
RL=32Ω
Vcc=5V
10
100
1k
10k
100k
0.4
0.8
1.2
1.6
2
0
Frequency, F(Hz)
Mute Control Voltage, VTM (V)
Total Harmonic Distortion vs. Output Voltage ( I )
Total Harmonic Distortion vs. Output Voltage ( II )
10
10
Ta=25℃
RL=32Ω
Vcc=5V
Ta=25℃
RL=32Ω
Vcc=3V
1
1
f=10kHz
f=10kHz
f=1kHz
0.1
0.1
f=1kHz
0.01
0.01
f=100Hz
f=100Hz
0.001
0.001
-40
-30
-10
0
10
-20
-40
-30
-10
0
10
-20
Output Voltage, VOUT (dBV)
Output Voltage, VOUT (dBV)
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3544
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS(Cont.)
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3544
LINEAR INTEGRATED CIRCUIT
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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