Product details

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 60 Power stage supply (min) (V) 16 Load (min) (Ω) 4 Output power (W) 20 THD + N at 1 kHz (%) 0.015 Iq (typ) (mA) 70 Control interface Hardware Closed/open loop Open Analog supply (min) (V) 16 Analog supply voltage (max) (V) 60 PSRR (dB) 95 Operating temperature range (°C) 0 to 70
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Mono Rating Catalog Power stage supply (max) (V) 60 Power stage supply (min) (V) 16 Load (min) (Ω) 4 Output power (W) 20 THD + N at 1 kHz (%) 0.015 Iq (typ) (mA) 70 Control interface Hardware Closed/open loop Open Analog supply (min) (V) 16 Analog supply voltage (max) (V) 60 PSRR (dB) 95 Operating temperature range (°C) 0 to 70
TO-220 (NDH) 5 86.0552 mm² 10.16 x 8.47 TO-220 (NEB) 5 46.4312 mm² 10.16 x 4.57
  • 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

  • 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

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 4 or 8 load on ±25V supplies. Using an 8 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.


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 4 or 8 load on ±25V supplies. Using an 8 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.


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Technical documentation

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Type Title Date
* Data sheet LM1875 20W Audio Power Amplifier datasheet (Rev. A) 13 May 2004
Application note Guidelines for Measuring Audio Power Amplifier Performance (Rev. A) 26 Aug 2019
Application note AN-1849 An Audio Amplifier Power Supply Design (Rev. C) 27 Jun 2019
More literature Die D/S LM1875 MWC 20-W Audio Power Amplifier 18 Sep 2012

Design & development

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Simulation model

LM1875 PSpice Model (Rev. A)

SNAM066A.ZIP (20 KB) - PSpice Model
Simulation model

LM1875 TINA-TI Reference Design (Rev. A)

SNAM068A.TSC (92 KB) - TINA-TI Reference Design
Simulation model

LM1875 TINA-TI Spice Model (Rev. A)

SNAM067A.ZIP (6 KB) - TINA-TI Spice Model
Simulation tool

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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Package Pins CAD symbols, footprints & 3D models
TO-220 (NDH) 5 Ultra Librarian
TO-220 (NEB) 5 Ultra Librarian

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