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LM48556TL Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM48556TL Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 20 page  December 10, 2008 LM48556 Fully Differential, Mono, Ceramic Speaker Driver General Description The LM48556 is a single supply, mono, ceramic speaker driv- er with an integrated charge-pump, designed for portable devices, such as cell phones, where board space is at a pre- mium. The LM48556 charge pump allows the device to deliver 17.5V PP (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 condi- tioning. Flexible power supply requirements allow operation from 2.7V to 5.0V. Additionally, the LM48556 features a dif- ferential input function and an externally configurable gain. A low power shutdown mode reduces supply current consump- tion to 0.1 μA. Superior click and pop suppression eliminates audible tran- sients on power-up/down and during shutdown. The LM48556 is available in an ultra-small 12-bump micro SMD package (2mm x 1.5mm). Key Specifications ■ Output Voltage Swing V DD = 3.6V, 1kHz 14.2V PP (typ) V DD = 4.5V, 1kHz 17.5V PP (typ) ■ Power Supply Rejection Ratio f = 217Hz, V DD = 3.6V 80dB (typ) ■ I DD at VDD = 3.6V 4.8mA (typ) ■ Wake-Up Time 0.5ms (typ) Features ■ Fully differential amplifier ■ Externally configurable gain ■ Integrated charge pump ■ Low power shutdown mode ■ Soft start function Applications ■ Mobile phones ■ PDA's ■ Digital cameras Boomer® is a registered trademark of National Semiconductor Corporation. © 2008 National Semiconductor Corporation 300572 www.national.com |
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