Power Amplifier. LM1875T Datasheet

LM1875T Amplifier. Datasheet pdf. Equivalent


etcTI LM1875T
LM1875
www.ti.com
SNAS524A – MAY 2004 – REVISED MAY 2004
LM1875 20W Audio Power Amplifier
Check for Samples: LM1875
FEATURES
1
2 Up to 30 Watts Output Power
• AVO Typically 90 dB
• Low Distortion: 0.015%, 1 kHz, 20 W
• Wide Power Bandwidth: 70 kHz
• 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
• Plastic Power Package TO-220
APPLICATIONS
• High Performance Audio Systems
• Bridge Amplifiers
• Stereo Phonographs
• Servo Amplifiers
• Instrument Systems
DESCRIPTION
The LM1875 is a monolithic power amplifier offering
very low distortion and high quality performance for
consumer audio applications.
The LM1875 delivers 20 watts into a 4Ω or 8Ω load
on ±25V supplies. Using an 8Ω load and ±30V
supplies, over 30 watts 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 LM1875 design takes advantage of 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.
Connection Diagram
Figure 1. NDH0005D, KC0005A,
NEB0005E, NEB0005B,
Front View
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2004, Texas Instruments Incorporated


LM1875T Datasheet
Recommendation LM1875T Datasheet
Part LM1875T
Description 20W Audio Power Amplifier
Feature LM1875T; LM1875 www.ti.com SNAS524A – MAY 2004 – REVISED MAY 2004 LM1875 20W Audio Power Amplifier Check f.
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Datasheet
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etcTI LM1875T
LM1875
SNAS524A – MAY 2004 – REVISED MAY 2004
Typical Applications
www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
Absolute Maximum Ratings(1)
Supply Voltage
60V
Input Voltage
Storage Temperature
VEE to VCC
65°C to + 150°C
Junction Temperature
150°C
(Soldering, 10 seconds)
260°C
Lead Temperature
θJC
θJA
3°C
73°C
(1) Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for
which the device is functional, but do not ensure specific performance limits.
2
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Product Folder Links: LM1875
Copyright © 2004, Texas Instruments Incorporated



etcTI LM1875T
LM1875
www.ti.com
SNAS524A – MAY 2004 – REVISED MAY 2004
Electrical Characteristics
VCC=+25V, VEE=25V, TAMBIENT=25°C, RL=8Ω, AV=20 (26 dB), fo=1 kHz, unless otherwise specified.
Parameter
Conditions
Typical
Tested Limits
Supply Current
Output Power(1)
THD (1)
Offset Voltage
POUT=0W
THD=1%
70
100
25
POUT=20W, fo=1 kHz
0.015
POUT=20W, fo=20 kHz
0.05
0.4
POUT=20W, RL=4Ω, fo=1 kHz
0.022
POUT=20W, RL=4Ω, fo=20 kHz
0.07
0.6
±1
±15
Input Bias Current
±0.2
±2
Input Offset Current
0
±0.5
Gain-Bandwidth Product
fo=20 kHz
5.5
Open Loop Gain
DC
90
PSRR
Max Slew Rate
VCC, 1 kHz, 1 Vrms
VEE, 1 kHz, 1 Vrms
20W, 8Ω, 70 kHz BW
95
52
83
52
8
Current Limit
Equivalent Input Noise Voltage
VOUT = VSUPPLY 10V
RS=600Ω, CCIR
4
3
3
Units
mA
W
%
%
%
%
mV
μA
μA
MHz
dB
dB
dB
V/μs
A
μVrms
(1) Assumes the use of a heat sink having a thermal resistance of 1°C/W and no insulator with an ambient temperature of 25°C. 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°C.
Typical Applications For Single Supply Operation
Figure 2.
Copyright © 2004, Texas Instruments Incorporated
Product Folder Links: LM1875
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