The LM4906 is an audio power amplifier primarily designed for demanding applications in mobile phones and other portable communication device applications. It is capable of delivering 1W of continuous average power to an 8? BTL load with less than 1% distortion (THD+N) from a +5V power supply.

The LM4906 is the first Texas Instruments Boomer Power Amplifier that does not require an external PSRR bypass capacitor. The LM4906 also has an internal selectable gain of either 6dB or 12dB. In addition, no output coupling capacitors or bootstrap capacitors are required which makes the LM4906 ideally suited for cell phone and other low voltage portable applications.

The LM4906 contains advanced pop and click circuitry that eliminates noise, which would otherwise occur during turn-on and turn-off transitions.

Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4906 features a low -power consumption shutdown mode (the part is enabled by pulling the SD pin high). Additionally, the LM4906 features an internal thermal shutdown protection mechanism.

• Selectable Gain of 6dB (2V/V) or 12dB (4V/V)
• No Output or PSRR Bypass Capacitors Required
• Improved “Click and Pop” Suppression Circuitry
• Very Fast Turn on Time: 5ms (Typ)
• Minimum External Components
• 2.6 - 5.5V Operation
• BTL Output Can Drive Capacitive Loads
• Ultra Low Current Shutdown Mode (SD Low)

Key Specifications

• Improved PSRR at 217Hz for +3V: 71 dB
• Power Output at +5V, THD+N = 1%, 8?: 1.0 W (Typ)
• Power Output at +3V, THD+N = 1%, 8?: 390 mW (Typ)
• Total Shutdown Power Supply Current: 0.1μA (Typ)

All trademarks are the property of their respective owners.

• Audio input type
• Analog Input
• Architecture
• Class-AB
• Speaker channels (Max)
• Mono
• Power stage supply (Max) (V)
• 5.5
• Power stage supply (Min) (V)
• 2.6
• Load (Min) (ohms)
• 8
• Output power (W)
• 1.3
• THD + N @ 1 kHz (%)
• 0.2
• Iq (Typ) (mA)
• 4
• Control interface
• GPIO
• Closed/open loop
• Closed
• Analog supply (Min) (V)
• 2.6
• Analog supply (Max) (V)
• 5.5
• PSRR (dB)
• 70
• Operating temperature range (C)
• -40 to 85

LM4906的完整型号有：LM4906MM/NOPB，以下是这些产品的关键参数及官网采购报价：

LM4906MM/NOPB，工作温度：-40 to 85，封装：VSSOP (DGK)-8，包装数量MPQ：1000个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：SN，TI官网LM4906MM/NOPB的批量USD价格：.592（1000+）

LM4906LDBD — 具有内部可选增益的 1W、旁路电容器更少音频功率放大器

The LM4906 is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a +5V power supply in a small LLP package.

It is the first National Semiconductor Boomer Power Amplifier that does not require an external PSRR bypass capacitor. In (...)

LM4906MMBD — 具有内部可选增益的 1W、旁路电容器更少音频功率放大器

The LM4906 is capable of delivering 1W of continuous average power to an 8Ω BTL load with less than 1% distortion (THD+N) from a +5V power supply.

It is the first National Semiconductor Boomer Power Amplifier that does not require an external PSRR bypass capacitor. In addition, no output coupling (...)

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