LM1875G-TA5-T [UTC]
Audio/Video Amplifier,;
| 型号： | LM1875G-TA5-T |
| 厂家： | 
Unisonic Technologies |
| 描述： | Audio/Video Amplifier, |
| 文件： | 总8页 (文件大小：299K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
LM1875
LINEAR INTEGRATED CIRCUIT
20W AUDIO POWER AMPLIFIER
DESCRIPTION
1
The UTC LM1875 is a monolithic power amplifier offering very
low distortion and high quality performance for consumer audio
applications. It delivers 20W into a 4Ω or 8Ω load on ±25V supplies.
TO-220-5
TO-220B
Using an 8Ω load and +30V supplies, over 30W of power may be
delivered. The amplifier is designed to operate with a minimum of
external components. Device overload protection consists of both
internal current limit and thermal shutdown.
The UTC LM1875 design utilizes advanced circuit techniques
and processing to achieve extremely low distortion levels even at
high output power levels. Other outstanding features include high
gain, fast slew rate and a wide power bandwidth, large output
voltage swing, high current capability, and a very wide supply range.
The amplifier is internally compensated and stable for gains of 10 or
greater.
1
FEATURES
*Up to 30W output power
*Avo typically 90 dB
*Low distortion: 0.015%,1kHz,20W
*Wide power bandwidth: 70kHz
*Protection for AC and DC short circuits to ground
*Thermal protection with parole circuit
*High current capability: 4A
*Wide supply range 16V-60V
*Internal output protection diodes
*94 dB ripple rejection
APPLICATIONS
*High performance audio systems
*Bridge amplifiers
*Stereo phonographs
*Servo amplifiers
*Instrument systems
ORDERING INFORMATION
Ordering Number
Pin Assignment
Package
Packing
1
2
3
4
5
Lead Free
Halogen Free
LM1875L-TA5-T
LM1875L-TB5-T
LM1875G-TA5-T
LM1875G-TB5-T
TO-220-5
TO-220B
+IN -IN -VEE OUT VCC
+IN -IN -VEE OUT VCC
Tube
Tube
LM1875G-TA5-T
(1) T: Tube
(1) Packing Type
(2) Package Type
(3) Green Package
(2) TA5: TO-220-5, TB5: TO-220B
(3) G: Halogen Free and Lead Free, L: Lead Free
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Copyright © 2020 Unisonic Technologies Co., Ltd
QW-R107-019.E
LM1875
LINEAR INTEGRATED CIRCUIT
MARKING
UTC
LM1875
L: Lead Free
G: Halogen Free
Date Code
Lot Code
1
UNISONICTECHNOLOGIESCO.,LTD
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LM1875
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified)
PARAMETER
SYMBOL
VCC
RATING
60
UNIT
V
Supply Voltage
Input Voltage
VIN
-VEE ~ VCC
+150
V
℃
Junction Temperature
Storage Temperature
TJ
TSTG
-40 ~ +150
℃
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.
ELECTRICAL CHARACTERISTICS
(VCC=+25V, -VEE=-25V, TA=25°C, RL=8Ω, Av=20(26dB), fo=1kHz, unless otherwise specified.)
PARAMETER
Supply Current
SYMBOL
ICC
TEST CONDITIONS
POUT=0W
MIN
TYP
70
MAX
100
UNIT
mA
W
Output Power(Note)
POUT THD=1%
POUT=20W,fo=1kHz
25
0.015
0.05
0.022
0.07
±1
POUT =20W, fo =20kHz
0.4
Total Harmonic Distortion
(Note)
THD
%
POUT =20W,RL=4Ω,fo=1kHz
POUT =20W,RL=4Ω,fo=20kHz
0.6
±15
±2
Offset Voltage
VO(OFF)
II(BIAS)
II(OFF)
mV
μA
Input Bias Current
Input Offset Current
Gain-Bandwidth Product
Open Loop Gain
±0.2
0
±0.5
μA
GBW Fo=20kHz
5.5
90
MHz
dB
Gv
RR
SR
DC
VCC,1kHz,1 Vrms
VEE,1kHz,1 Vrms
20W,8Ω,70kHz BW
52
52
95
83
Power Supply Rejection Ratio
dB
Max Slew Rate
8
V/μs
A
Current Limit
ILIMIT VOUT=VSUPPLY–10V
eN Rs=600Ω,CCIR
3
4
Equivalent Input Noise Voltage
3
μVrms
Note: Assumes the use of a heat sink having a thermal resistance of 1℃/W and no insulator with an Ta=25℃.
Because the output limiting circuitry has a negative temperature coefficient, the maximum output power
delivered to a 4Ω load may be slightly reduced when the tab temperature exceeds 55℃.
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LM1875
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
+Vcc
+
C3
0.1μF
C7 100μF
4Ω~8Ω
C1
2.2μF
1
2
VIN
5
+
_
R2
22k
R1
1M
4
+
LM1875
3
R5
1
C5
0.22μF
-VEE
C6
100μF
C4
0.1μF
R4
20k
R3 1K
+
C2
22μF
TYPICAL SINGLE SUPPLY OPERATION
C4
0.1μF
R2
22k
R1
22k
+Vcc
+
C2
10μF
C7
R3
22k
100μF
+
C1
1.0μF
1
C6
2200μF
+
5
VIN
+
4
R4
1M
LM1875
3
2
_
R7
1
4Ω~ 8Ω
C5
0.22μF
C3
10μF
R5
10k
R6
200k
+
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LM1875
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
THD vs Power Output
THD vs Supply Voltage
1.0
0.1
Vs=+25V
PD=10W
0.09
0.08
0.07
0.06
0.1
0.05
0.04
0.03
RL=4Ω
RL=8Ω
0.02
0.01
0
0.01
20 50 100
5K 10K 20K
200 500 1K 2K
Frequency (Hz)
0.1
100
1.0
10
Power Output (W)
Supply Current vs Supply Voltage
Power Output vs Supply Voltage
35
30
25
20
100
80
RL=8Ω
THD=1%
60
40
15
10
5
20
0
0
5
0
10
Supply Voltage (±V)
30
15
20
25
5
0
10
30
15
20
25
Supply Voltage (+V)
Device Dissipation vs Ambient Temperature
RR vs Frequency
45
100
90
INFINITE HEAT SINK
40
80
70
60
35
POSITIVE SUPPLY
30
1℃/W HEAT SINK
25
NEGATIVE SUPPLY
2℃/W
50
40
30
20
5℃/W
HEAT SINK
HEAT SINK
15
10
INPUT REFERRED
RS=0
RL=4
1 Vrms
20
5
10
0
10℃/W HEAT SINK
0
0
20 40 60
120 140 160
Ta - Ambient Temperture (℃)
80 100
20 50 100
5K 10K 20K
200 500 1K 2K
Frequency (Hz)
Interface=1℃/W
See Application Hints.
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LM1875
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS (Cont.)
Power Disipation vs Power Output
Power Disipation vs Power Output
50
45
50
45
Vs=+30V
RL=8Ω
fo=1kHz
40
35
30
40
35
30
Vs=+30V
Vs=+25V
Vs=+25V
Vs=+20V
25
20
15
25
20
15
Vs=+20V
Vs=+15V
10
10
Vs=+15V
RL=4Ω
5
0
5
0
fo=1kHz
0
10
15
20
25
30
5
0
10
15
20
25
30
5
Power Output (W)
Power Output (W)
IOUT vs VOUT-Current Limit/
Safe Operating Area Boundary
Open Loop Gain and Phase vs
Frequency
30
25
20
15
10
5
6
4
2
0
180
135
90
45
0
0
-2
-45
-90
-135
-180
-5
-10
-15
-20
-4
-6
20 25
15
10
-25
-15 -10
-20
-5
0
5
100k
1M
10M
Frequency (Hz)
Output Voltage (V)
Input Bias Current vs Supply Volage
300
250
TA=70℃
TA
=
2
5
℃
TA=0℃
200
150
100
0
* Thermal shutdown with infinite heat sink
**Thermal shutdown with 1℃/ W heat sink
5
0
10
30
15
20
25
Supply Voltage(+V)
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LM1875
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUIT
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LM1875
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. UTC reserves the right to
make changes to information published in this document, including without limitation specifications and
product descriptions, at any time and without notice. This document supersedes and replaces all
information supplied prior to the publication hereof.
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