IC AMP AUDIO PWR MONO AB 16USMD

LM48557TL/NOPB

Manufacturer Part NumberLM48557TL/NOPB
DescriptionIC AMP AUDIO PWR MONO AB 16USMD
ManufacturerNational Semiconductor
SeriesBoomer®
TypeClass AB
LM48557TL/NOPB datasheet
 

Specifications of LM48557TL/NOPB

Output Type1-Channel (Mono)Voltage - Supply2.7 V ~ 4.5 V
FeaturesDepop, Differential Inputs, I²C, Mute, Shutdown, Volume ControlMounting TypeSurface Mount
Package / Case16-MicroSMDOperational ClassClass-AB
Audio Amplifier Output Configuration1-Channel MonoAudio Amplifier FunctionSpeaker
Single Supply Voltage (typ)Not RequiredVDual Supply Voltage (typ)3V
Power Supply RequirementDualRail/rail I/o TypeNo
Power Supply Rejection Ratio80dBSingle Supply Voltage (min)Not RequiredV
Single Supply Voltage (max)Not RequiredVDual Supply Voltage (min)1.7/2.7V
Dual Supply Voltage (max)4.5VOperating Temp Range-40C to 85C
Operating Temperature ClassificationIndustrialMountingSurface Mount
Pin Count16Package TypeuSMD
Lead Free Status / RoHS StatusLead free / RoHS CompliantMax Output Power X Channels @ Load-
Other namesLM48557TLTR  
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SINGLE AND MULTI-BYTE WRITE OPERATION
The LM48557 supports both single-byte and multi-byte write
operations. A single-byte write operation begins with the mas-
ter device transmitting a START condition followed by the
device address (Figure 7). After receiving the correct device
address, the LM48557 generates an ACK bit. The master de-
vice transmits the register data byte, after which the LM48557
generates and ACK bit. Following the ACK, the master issues
a STOP condition, completing the singly-byte data transfer.
A multi-byte write operation is similar to a single-byte opera-
tion, the master device issues a START condition and device
GENERAL AMPLIFIER FUNCTION
The LM48557 is a fully differential ceramic speaker driver that
utilizes National’s inverting charge pump technology to deliv-
er over 5.8V
to a 1µF ceramic speaker while operating
RMS
from a single 4.2V supply. The low noise, inverting charge
pump generates a negative supply voltage (CPV
address, and the LM48557 responds with an ACK (Figure 8).
The master device then transmits the first data byte. Following
the LM48557’s ACK, the master device does not issue a
STOP condition, transmitting a second data byte instead. The
LM48557 responds with an ACK bit. The master device can
continue to issue data bytes, and the LM48557 will respond
with an ACK, until a STOP condition is issued. Once a STOP
condition is issued, the LM48557 ignores the I
master issues the LM48557’s device address.
FIGURE 7. Single-Byte Write Example
FIGURE 8. Multi-Byte Write Example
positive supply voltage (PV
tage of the increased head room created by the charge pump
and the bridge-tied load (BTL) architecture, delivering signif-
icantly more voltage than a single-ended, single-supply am-
plifier to the speaker.
) from the
SS
13
2
C bus until the
30098109
30098105
). The LM48557 takes advan-
DD
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