Mono 1.3W Audio Power Amplifier with Output Fault Detection and Volume Control


Product details


Audio input type Analog Input Architecture Class-AB Speaker channels (Max) Mono Power stage supply (Max) (V) 5.5 Power stage supply (Min) (V) 3 Load (Min) (ohms) 8 Output power (W) 2.4 SNR (dB) 104 THD + N @ 1 kHz (%) 0.04 Iq (Typ) (mA) 4.4 Control interface I2C Closed/open loop Closed Analog supply (Min) (V) 3 Analog supply (Max) (V) 5.5 PSRR (dB) 74 Operating temperature range (C) -40 to 105 open-in-new Find other Speaker amps

Package | Pins | Size

HTSSOP (PWP) 14 32 mm² 5 x 6.4 open-in-new Find other Speaker amps


  • Output Fault Detection
  • I2C Volume and Mode Control
  • Input Mixer and Multiplexer
  • High PSRR
  • Individual 32-Step Volume Control
  • Short Circuit and Thermal Protection
  • Advanced Click-and-Pop Suppression
  • Low-Power Shutdown Mode
  • Available in 14-Pin HTSSOP Package
  • Key Specifications:
    • Output Power at VDD = 5 V, RL = 8 Ω,
      THD+N ≤ 1% 1.3 W (Typical)
    • Quiescent Power Supply Current at 5 V,
      6 mA (Typical)
    • PSRR at 1 kHz 74 dB (Typical)
    • Shutdown current 0.01 µA (Typical)
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The LM48100Q-Q1 is a single supply, mono, bridge-tied load amplifier with I2C volume control, ideal for automotive applications. A comprehensive output fault detection system senses the load conditions, protecting the device during short circuit events, as well as detecting open circuit conditions.

Operating from a single 5-V supply, the LM48100Q-Q1 delivers 1.3 W of continuous output power to an 8 Ω load with < 1% THD+N. Flexible power supply requirements allow operation from 3 V to 5.5 V. High power supply rejection ratio (PSRR), 74 dB at 1 kHz, allows the device to operate in noisy environments without additional power supply conditioning.

The LM48100Q-Q1 features dual audio inputs that can be mixed/multiplexed to the device output. Each input path has its own independent, 32-step volume control. The mixer, volume control and device mode select are controlled through an I2C compatible interface. An open drain FAULT output indicates when a fault has occurred. Comprehensive output short circuit and thermal overload protection prevent the device from being damaged during a fault condition.

A low power shutdown mode reduces supply current consumption to 0.01 µA. Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM48100Q-Q1 is available in an 14-pin HTSSOP PowerPAD™ IC package.

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Technical documentation

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* Datasheet LM48100Q-Q1 Boomer Mono, 1.3-W Audio Power Amplifier With Output Fault Detection and Volume Control datasheet (Rev. E) Nov. 20, 2015

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