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LM48556TLX/NOPB
Fully Differential, Mono, Ceramic Speaker Driver
LM48556
www.ti.com SNAS452B –JUNE 2008–REVISED MAY 2013
LM48556 Boomer™ Fully Differential, Mono, Ceramic Speaker Driver
Checkfor Samples: LM48556
1FEATURES DESCRIPTIONThe LM48556isa single supply, mono, ceramic
23• Fully Differential Amplifier speaker driver with an integrated charge-pump,
• Externally Configurable Gain designed for portable devices, such as cell phones,
Integrated Charge Pump where board spaceisata premium. The LM48556
charge pump allows the device to deliver 17.5VPP
• Low Power Shutdown Mode (typ) froma single 4.5V supply. Additionally, the
• Soft Start Function charge pump featuresa soft start function that
minimizes transient current during power-up.
APPLICATIONS The LM48556 features high power supply rejection
• Mobile Phones ratio (PSRR)of 80dBat 217Hz, allowing the deviceto
PDA's operate in noisy environments without additional
power supply conditioning. Flexible power supply
• Digital Cameras requirements allow operation from 2.7V to 5.0V.
Additionally, the LM48556 featuresa differential input
KEY SPECIFICATIONS function and an externally configurable gain.A low
Output Voltage Swing power shutdown mode reduces supply current
consumptionto 0.1μA.
– VDD= 3.6V, 1kHz 14.2VPP (typ) VDD= 4.5V, 1kHz 17.5VPP (typ) Superior click and pop suppression eliminates audible
transients on power-up/down and during shutdown.
• Power Supply Rejection Ratio The LM48556is availablein an ultra-small 12-bump
–f= 217Hz, VDD= 3.6V 80dB (typ) DSBGA package (2mmx 1.5mm).
IDDat VDD= 3.6V 4.8mA (typ) Wake-Up Time 0.5ms (typ)
