LM48100Q-Q1 (正在供货)

具有输出故障检测和音量控制功能的单声道 1.3W 音频功率放大器



  • TAS5421-Q1  -  Includes integrated diagnostics and load dump functions


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.


  • 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)


参数 与其它产品相比 扬声器放大器(AB 类/D 类)

Analog Supply (V) (Min)
Analog Supply (V) (Max)
Speaker Channels (Max)
Audio Input Type
Output Power (W)
Load (Min) (ohms)
Iq (Typ) (mA)
Iq (Max) (mA)
THD + N @ 1 kHz (%)
Iq per channel (Typ) (mA)
Package Size: mm2:W x L (PKG)
Operating Temperature Range (C)
Control Interface
Shutdown Current (ISD) (uA)
LM48100Q-Q1 TAS2505-Q1 TAS2521 TPA2005D1-Q1
3    1.5    1.5    4.5   
5    1.95    1.95    5.5   
Class AB    Class D    Class D    Class D   
Mono    Mono    Mono    Mono   
Analog Input    Analog Input
Digital Input   
Analog Input
Digital Input   
Analog Input   
2.4    2.6    2    1.18   
8    4    4    8   
4.4        2.8   
10.8        4.5   
0.04        0.2   
74    47.2    47.2    75   
2.2        2.8   
14HTSSOP    24VQFN    24VQFN    8MSOP-PowerPAD
14HTSSOP: 32 mm2: 6.4 x 5(HTSSOP)    24VQFN: 16 mm2: 4 x 4(VQFN)    24VQFN: 16 mm2: 4 x 4(VQFN)    8MSOP-PowerPAD: 15 mm2: 4.9 x 3(MSOP-PowerPAD)
See datasheet (SON)   
-40 to 105    -40 to 105    -40 to 85    -40 to 105
-40 to 85   
I2C    I2C, SPI    I2C
0.01    0.04    0.04    0.5   
Automotive    Automotive    Catalog    Automotive