LM48556
www.ti.com SNAS452B – JUNE 2008 – REVISED MAY 2013 LM48556 Boomer™ Fully Differential, Mono, Ceramic Speaker Driver
Check for Samples: LM48556 FEATURES 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. 1 23 Fully Differential Amplifier
Externally Configurable Gain
Integrated Charge Pump
Low Power Shutdown Mode
Soft Start Function APPLICATIONS Mobile Phones
PDA's
Digital Cameras KEY SPECIFICATIONS Output Voltage Swing
– VDD = 3.6V, 1kHz 14.2VPP (typ)
– VDD = 4.5V, 1kHz 17.5VPP (typ)
Power Supply Rejection Ratio
– f = 217Hz, VDD = 3.6V 80dB (typ)
IDD at VDD = 3.6V 4.8mA (typ)
Wake-Up Time 0.5ms (typ) The LM48556 features high power supply rejection
ratio (PSRR) of 80dB at 217Hz, allowing the device to …
