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3544 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 3544
기능 HEADPHONE AMPLIFIER
제조업체 UTC
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3544 데이터시트, 핀배열, 회로
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
Lead Free
Halogen Free
3544L-D08-T
3544G-D08-T
- 3544G-S08-R
Package
DIP-8
SOP-8
Packing
Tube
Tape Reel
MARKING
DIP-8
SOP-8
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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3544 pdf, 반도체, 판매, 대치품
3544
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
PARAMETER
SYMBOL
RATINGS
UNIT
Applied Voltage
VMAX
7.0
V
Power Dissipation
Derate above 25°C
PD
450 mW
4.5 mW/°C
Operating Temperature
TOPR
-25 ~ +75
°C
Storage Temperature
TSTG
-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
Power Supply Voltage
SYMBOL
VCC
MIN
2.8
TYP
MAX
6.5
ELECTRICAL CHARACTERISTICS (Ta=25°C, VCC=5.0V, RL=32, VIN= -6dBV, f=1kHz)
UNIT
V
PARAMETER
Mute Pin Control Voltage
Quiescent Current
Voltage Gain
Voltage Gain Difference Between Channels
Total Harmonic Distortion
Rated Output 1
Rated Output 2
Output Noise Voltage
Channel Separation
Mute Attenuation
Ripple Rejection
SYMBOL
CONDITIONS
VTM
IQ VIN=0Vrms
Gv
Gv(DIFF)
THD BW=20~20kHz
Po1 RL=32,THD<0.1%
Po2 RL=16,THD<0.1%
eN BW=20~20kHz,Rg=0
CS Rg=0
ATT Rg=0
RR fRR=100Hz, VRR= -20dBV
MIN TYP MAX UNIT
0.3 0.7 1.6 V
4 7 10 mA
4 6 8 dB
-0.5 0 0.5 dB
0.02 0.1 %
25 31
mW
50 62
mW
-93 -85 dBV
82 90
dB
70 80
dB
50 57
dB
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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3544 전자부품, 판매, 대치품
3544
APPLICATION EXAMPLE
LINEAR INTEGRATED CIRCUIT
Vcc
+
330μ+ C1
Vcc
8
C6+ 47μ
OUT2
7
BIAS
6
1μ
IN2
5
C3
TSD
BIAS
6dB
+
6dB +
MUTE
90K
90K
VMUTE
H:Active
L:Mute
C7
+
330μ
1
OUT1
R2
2
MUTE
100k
C2 1μ
3
IN1
4
GND
1μ
C5
VIN2
VIN1
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 180kfor this IC, it can be
determined by this formula
C3(C5)=1/(2π×180k×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 190kmust 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(90k/(90k+R3))[dB]
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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QW-R107-040.D

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