LM48556中文资料具有集成式 17.5V 电荷泵的单声道、模拟输入陶瓷扬声器驱动器数据手册TI规格书

描述 Description

The LM48556 is a single supply, mono, ceramic speaker driver with an integrated charge-pump, designed for portable devices, such as cell phones, where board space is at a premium. The LM48556 charge pump allows the device to deliver 17.5VPP (typ) from a single 4.5V supply. Additionally, the charge pump features a soft start function that minimizes transient current during power-up. The LM48556 features high power supply rejection ratio (PSRR) of 80dB at 217Hz, allowing the device to operate in noisy environments without additional power supply conditioning. Flexible power supply requirements allow operation from 2.7V to 5.0V. Additionally, the LM48556 features a differential input function and an externally configurable gain. A low power shutdown mode reduces supply current consumption to 0.1μA.Superior click and pop suppression eliminates audible transients on power-up/down and during shutdown. The LM48556 is available in an ultra-small 12-bump DSBGA package (2mm x 1.5mm).

特性 Features

• Fully Differential Amplifier
• Integrated Charge Pump
• Soft Start Function
• Output Voltage Swing
• VDD = 4.5V, 1kHz 17.5VPP (typ)
• Power Supply Rejection Ratio
• IDD at VDD = 3.6V 4.8mA (typ)
• Wake-Up Time 0.5ms (typ)
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