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LM48520

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2.7-W, stereo, analog input Class-D audio amp with integrated boost & EMI spread spectrum

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Data sheet

LM48520

ACTIVE
Data sheet Order now

Product details

Audio input type Analog Input Architecture Class-D Boosted Speaker channels (max) Stereo Rating Catalog Load (min) (Ω) 8 Output power (W) 1.3 THD + N at 1 kHz (%) 0.04 Iq (typ) (mA) 8 Control interface GPIO Analog supply (min) (V) 2.6 Analog supply voltage (max) (V) 5 PSRR (dB) 82 Operating temperature range (°C) -40 to 85
Audio input type Analog Input Architecture Class-D Boosted Speaker channels (max) Stereo Rating Catalog Load (min) (Ω) 8 Output power (W) 1.3 THD + N at 1 kHz (%) 0.04 Iq (typ) (mA) 8 Control interface GPIO Analog supply (min) (V) 2.6 Analog supply voltage (max) (V) 5 PSRR (dB) 82 Operating temperature range (°C) -40 to 85
DSBGA (YZR) 25 7.5625 mm² 2.75 x 2.75
  • Click and Pop Suppression
  • Low 0.04μA Shutdown Current
  • 78% Efficiency
  • Filterless Class D
  • 2.7V - 5.0V Operation
  • 4 Adjustable Gain Settings
  • Adjustable Output Swing Limiter with Soft Clipping
  • Speaker Protection
  • Short Circuit Protection on Audio Amps
  • Independent Boost and Amplifier Shutdown Pins

Key Specifications

  • Quiescent Power Supply Current: 11.5 mA(typ)
  • Output Power (RL = 8Ω, THD+N ≤ 1%,
    VDD = 3.3V,PV1 = 5.0V): 1.1 W(typ)
  • Shutdown Current: 0.04 μA(typ)

All trademarks are the property of their respective owners.

  • Click and Pop Suppression
  • Low 0.04μA Shutdown Current
  • 78% Efficiency
  • Filterless Class D
  • 2.7V - 5.0V Operation
  • 4 Adjustable Gain Settings
  • Adjustable Output Swing Limiter with Soft Clipping
  • Speaker Protection
  • Short Circuit Protection on Audio Amps
  • Independent Boost and Amplifier Shutdown Pins

Key Specifications

  • Quiescent Power Supply Current: 11.5 mA(typ)
  • Output Power (RL = 8Ω, THD+N ≤ 1%,
    VDD = 3.3V,PV1 = 5.0V): 1.1 W(typ)
  • Shutdown Current: 0.04 μA(typ)

All trademarks are the property of their respective owners.

The LM48520 integrates a boost converter with a high efficiency Class D stereo audio power amplifier to provide up to 1W/ch continuous power into an 8Ω speaker when operating from 2.7V to 5.0V power supply with boost voltage (PV1) of 5.0V. The LM48520 utilizes a proprietary spread spectrum pulse width modulation technique that lowers RF interference and EMI levels. The Class D amplifier is a low noise, filterless PWM architecture that eliminates the output filter, reducing external component count, board area, power consumption, system cost, and simplifying design.

The LM48520 is designed for use in mobile phones and other portable communication devices. The high (78%) efficiency extends battery life when compared to Boosted Class AB amplifiers. The LM48520 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND). Also, external leakage is minimized via control of the ground reference via the SW-OUT pin .

The LM48520 has 4 gain options which are pin selectable via Gain0 and Gain1 pins. Output short circuit prevents the device from damage during fault conditions. Superior click and pop suppression eliminates audible transients during power-up and shutdown.

The LM48520 integrates a boost converter with a high efficiency Class D stereo audio power amplifier to provide up to 1W/ch continuous power into an 8Ω speaker when operating from 2.7V to 5.0V power supply with boost voltage (PV1) of 5.0V. The LM48520 utilizes a proprietary spread spectrum pulse width modulation technique that lowers RF interference and EMI levels. The Class D amplifier is a low noise, filterless PWM architecture that eliminates the output filter, reducing external component count, board area, power consumption, system cost, and simplifying design.

The LM48520 is designed for use in mobile phones and other portable communication devices. The high (78%) efficiency extends battery life when compared to Boosted Class AB amplifiers. The LM48520 features a low-power consumption shutdown mode. Shutdown may be enabled by driving the Shutdown pin to a logic low (GND). Also, external leakage is minimized via control of the ground reference via the SW-OUT pin .

The LM48520 has 4 gain options which are pin selectable via Gain0 and Gain1 pins. Output short circuit prevents the device from damage during fault conditions. Superior click and pop suppression eliminates audible transients during power-up and shutdown.
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* Data sheet LM48520 Boostd Stere Clas D Audio Pwr Amp w/Output Spkr Prot & Spread Spectrum datasheet (Rev. C) 05 Apr 2013

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