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LM4755

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11-W, stereo, 9- to 40-V, analog input Class-AB audio amplifier & integrated mute function

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Data sheet

LM4755

ACTIVE
Data sheet Order now

Product details

Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 40 Power stage supply (min) (V) 9 Load (min) (Ω) 4 Output power (W) 11 THD + N at 1 kHz (%) 0.08 Iq (typ) (mA) 5 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 9 Analog supply voltage (max) (V) 40 PSRR (dB) 50 Operating temperature range (°C) -20 to 80
Audio input type Analog Input Architecture Class-AB Speaker channels (max) Stereo Rating Catalog Power stage supply (max) (V) 40 Power stage supply (min) (V) 9 Load (min) (Ω) 4 Output power (W) 11 THD + N at 1 kHz (%) 0.08 Iq (typ) (mA) 5 Control interface Hardware Closed/open loop Closed Analog supply (min) (V) 9 Analog supply voltage (max) (V) 40 PSRR (dB) 50 Operating temperature range (°C) -20 to 80
TO-263 (KTW) 9 145.796 mm² 10.16 x 14.35
  • Drives 4Ω and 8Ω Loads
  • Integrated Mute Function
  • Internal Gain Resistors
  • Minimal External Components Needed
  • Single Supply Operation
  • Internal Current Limiting and Thermal Protection
  • Compact 9-lead TO-220 Package
  • Wide Supply Range 9V - 40V

Key Specifications

  • Output Power at 10% THD with 1kHz into 4Ω at VCC = 24V 11 W (typ)
  • Output Power at 10% THD with 1kHz into 8Ω at VCC = 24V 7 W (typ)
  • Closed Loop Gain 34 dB (typ)
  • PO at 10% THD+N @ 1kHz into 4Ω Single-Ended DDPAK Package at VCC=12V 2.5 W (typ)
  • PO at 10% THD+N @ 1kHz into 8Ω Bridged DDPAK Package at VCC=12V 5 W (typ)

All trademarks are the property of their respective owners.

  • Drives 4Ω and 8Ω Loads
  • Integrated Mute Function
  • Internal Gain Resistors
  • Minimal External Components Needed
  • Single Supply Operation
  • Internal Current Limiting and Thermal Protection
  • Compact 9-lead TO-220 Package
  • Wide Supply Range 9V - 40V

Key Specifications

  • Output Power at 10% THD with 1kHz into 4Ω at VCC = 24V 11 W (typ)
  • Output Power at 10% THD with 1kHz into 8Ω at VCC = 24V 7 W (typ)
  • Closed Loop Gain 34 dB (typ)
  • PO at 10% THD+N @ 1kHz into 4Ω Single-Ended DDPAK Package at VCC=12V 2.5 W (typ)
  • PO at 10% THD+N @ 1kHz into 8Ω Bridged DDPAK Package at VCC=12V 5 W (typ)

All trademarks are the property of their respective owners.

The LM4755 is a stereo audio amplifier capable of delivering 11W per channel of continuous average output power to a 4Ω load or 7W per channel into 8Ω using a single 24V supply at 10% THD+N. The internal mute circuit and pre-set gain resistors provide for a very economical design solution.

Output power specifications at both 20V and 24V supplies and low external component count offer high value to consumer electronic manufacturers for stereo TV and compact stereo applications. The LM4755 is specifically designed for single supply operation.

The LM4755 is a stereo audio amplifier capable of delivering 11W per channel of continuous average output power to a 4Ω load or 7W per channel into 8Ω using a single 24V supply at 10% THD+N. The internal mute circuit and pre-set gain resistors provide for a very economical design solution.

Output power specifications at both 20V and 24V supplies and low external component count offer high value to consumer electronic manufacturers for stereo TV and compact stereo applications. The LM4755 is specifically designed for single supply operation.
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Technical documentation

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Type Title Date
* Data sheet LM4755 Stereo 11W Audio Power Amplifier with Mute datasheet (Rev. E) 04 Apr 2013
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

Design & development

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Simulation model

LM4755 TINA-TI Reference Design

SNAM056.TSC (747 KB) - TINA-TI Reference Design
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Simulation model

LM4755 TINA-TI Spice Model

SNAM057.ZIP (21 KB) - TINA-TI Spice Model
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Simulation model

LM4755 Unencrypted PSpice Mode (Rev. A)

SNAM055A.ZIP (25 KB) - PSpice Model
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TO-263 (KTW) 9 Ultra Librarian
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