Audio Amp Speaker 1-CH Mono 25W Class-AB 5-Pin (5+Tab) TO-220 Rail

LM1875T

Manufacturer Part NumberLM1875T
DescriptionAudio Amp Speaker 1-CH Mono 25W Class-AB 5-Pin (5+Tab) TO-220 Rail
ManufacturerNational Semiconductor
LM1875T datasheet
 


Specifications of LM1875T

Package5TO-220FunctionSpeaker
Amplifier TypeClass-ABTypical Voltage Gain90 dB
Total Harmonic Distortion Noise0.015@8Ohm@20W %Typical Psrr95 dB
Output Signal TypeSingleTypical Gain Bandwidth Product5.5 MHz
Maximum Input Bias Current2@±25V uAMaximum Input Offset Voltage15@±25V mV
Maximum Load Resistance8 OhmOutput Type1-Channel Mono
Amplifier ClassBNo. Of Channels1
Output Power25WSupply Voltage Range16V To 60V
Load Impedance8ohmOperating Temperature Range0°C To +70°C
Amplifier Case StyleTO-220Rohs CompliantNo
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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 Summary of contents

  • Page 1

    ... 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 watts output power n A typically Low distortion: 0.015%, 1 kHz ± 25V ...

  • 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 does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications. inches (millimeters) unless otherwise noted (Continued) Order Number LM1875T LB02 NS Package Number TA05B 2 ...