IC AMP AUDIO PWR 30W AB TO220-5

LM1875T/NOPB

Manufacturer Part NumberLM1875T/NOPB
DescriptionIC AMP AUDIO PWR 30W AB TO220-5
ManufacturerNational Semiconductor
TypeClass AB
LM1875T/NOPB datasheets
 


Specifications of LM1875T/NOPB

Output Type1-Channel (Mono)Max Output Power X Channels @ Load30W x 1 @ 8 Ohm
Voltage - Supply16 V ~ 60 V, ±8 V ~ 30 VFeaturesShort-Circuit and Thermal Protection
Mounting TypeThrough HolePackage / CaseTO-220-5 (Bent and Staggered Leads)
Amplifier TypeAudioBandwidth70 kHz (Power), 5.5 MHz (Gain)
Current, Input Bias±0.2 μACurrent, Input Offset0 mA
Current, Supply70 mAHarmonic Distortion0.015 %
Open Loop Gain90Package TypeTO220-5
Slew Rate8Voltage, Input-25 to +25 V
Voltage, Input Offset±1 mVVoltage, Noise3 μV
Voltage, Supply16 to 60 VAmplifier ClassB
No. Of Channels1Output Power25W
Supply Voltage Range16V To 60VLoad Impedance8ohm
Operating Temperature Range0°C To +150°CAmplifier Case StyleTO-220
Rohs CompliantYesLead Free Status / RoHS StatusLead free / RoHS Compliant
Other names*LM1875T
*LM1875T/NOPB
LM1875
LM1875T
  
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LM1875
20W Audio Power Amplifier
General 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
±
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 distor-
tion levels even at high output power levels. Other outstand-
ing 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
Front View
Package
Ordering Info
For Straight Leads
LM1875T
SL108949
For Stagger Bend
LM1875T
LB03
For 90˚ Stagger
LM1875T
Bend
LB05
For 90˚ Stagger
LM1875T
Bend
LB02
© 2002 National Semiconductor Corporation
Features
n Up to 30 watts output power
n A
typically 90 dB
VO
n Low distortion: 0.015%, 1 kHz, 20 W
±
25V
n Wide power bandwidth: 70 kHz
n Protection for AC and DC short circuits to ground
n Thermal protection with parole circuit
n High current capability: 4A
n Wide supply range 16V-60V
n Internal output protection diodes
n 94 dB ripple rejection
n Plastic power package TO-220
Applications
n High performance audio systems
n Bridge amplifiers
n Stereo phonographs
n Servo amplifiers
n Instrument systems
Typical Applications
00503001
NSC Package
Number
T05A
T05D
T05E
TA05B
DS005030
July 2002
00503002
www.national.com

LM1875T/NOPB Summary of contents

  • Page 1

    ... LM1875T LB03 For 90˚ Stagger LM1875T Bend LB05 For 90˚ Stagger LM1875T Bend LB02 © 2002 National Semiconductor Corporation Features watts output power n A typically Low distortion: 0.015%, 1 kHz ± 25V n Wide power bandwidth: 70 kHz n Protection for AC and DC short circuits to ground ...

  • Page 2

    Absolute Maximum Ratings Supply Voltage Input Voltage Storage Temperature Junction Temperature Electrical Characteristics V =+25V, −V =−25V, T =25˚ AMBIENT Parameter Supply Current Output Power (Note 2) THD (Note 2) Offset Voltage Input Bias Current Input Offset ...

  • Page 3

    Typical Performance Characteristics THD vs Power Output Power Output vs Supply Voltage PSRR vs Frequency 00503009 Supply Current vs Supply 00503011 00503013 φINTERFACE = 1˚C/W. † See Application Hints. 3 THD vs Frequency 00503010 Voltage 00503012 Device Dissipation vs Ambient ...

  • Page 4

    Typical Performance Characteristics Power Dissipation vs Power Output -Current Limit/ OUT OUT Safe Operating Area Boundary Input Bias Current vs Supply Voltage www.national.com (Continued) 00503015 00503017 Note 3: Thermal shutdown with infinite heat sink Note 4: Thermal ...

  • Page 5

    5 www.national.com ...

  • Page 6

    Application Hints STABILITY The LM1875 is designed to be stable when operated at a closed-loop gain greater, but, as with any other high-current amplifier, the LM1875 can be made to oscillate under certain conditions. These usually involve ...

  • Page 7

    Application Hints (Continued) output stage and constant power dissipation in all other parts of the circuit. The curves of “Power Dissipation vs Power Output” give a better representation of the behavior of the LM1875 with various power supply voltages and ...

  • Page 8

    Component Layouts www.national.com Split Supply 00503006 Single Supply 00503007 8 ...

  • Page 9

    Physical Dimensions inches (millimeters) unless otherwise noted TO-220 Power Package (T) Order Number LM1875T NS Package Number T05D Order Number LM1875T SL108949 NS Package Number T05A 9 www.national.com ...

  • Page 10

    Physical Dimensions www.national.com inches (millimeters) unless otherwise noted (Continued) Order Number LM1875T LB05 NS Package Number T05E 10 ...

  • Page 11

    ... NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant ...