Datasheet

LM48100Q
SNAS470D –OCTOBER 2008–REVISED MARCH 2013 www.ti.com
PCB Layout Guidelines
Minimize trace impedance of the power, ground and all output traces for optimum performance. Voltage loss due
to trace resistance between the LM48100Q and the load results in decreased output power and efficiency. Trace
resistance between the power supply and ground has the same effect as a poorly regulated supply, increased
ripple and reduced peak output power. Use wide traces for power supply inputs and amplifier outputs to minimize
losses due to trace resistance, as well as route heat away from the device. Proper grounding improves audio
performance, minimizes crosstalk between channels and prevents digital noise from interfering with the audio
signal. Use of power and ground planes is recommended.
Place all digital components and route digital signal traces as far as possible from analog components and
traces. Do not run digital and analog traces in parallel on the same PCB layer. If digital and analog signal lines
must cross either over or under each other, ensure that they cross in a perpendicular fashion.
Exposed Dap Mounting Considerations
The LM48100Q HTSSOP-EP package features an exposed die-attach (thermal) pad on its backside. The
exposed pad provides a direct heat conduction path from the die to the PCB, reducing the thermal resistance of
the package. Connect the exposed pad to GND with a large pad and via to a large GND plane on the bottom of
the PCB for best heat distribution.
LM48100QTL Demoboard Bill of Materials
Designator Quantity Description
C1 1 10µF ±10% 16V Tantalum Capacitor (B Case) AVX TPSB106K016R0800
C2 1 1µF ±10% 16V X7R Ceramic Capacitor (603) Murata GRM188R71C105KA12D
0.1µF ±10% 16V X7R Ceramic Capacitor (603) Murata GRM188R71C104KA01D
C3, C5 2
Panasonic ECJ-1VB1C104K
C4 1 2.2 µF ±10% 16V X7R Ceramic Capacitor (603) Murata GRM188R71A225KE15D
0.1µF ±10% 50V X5R Ceramic Capacitor (1206) Murata
C6, C7 2
GRM319R71H104KA01D
R1, R2 2 5kΩ ±5% 1/10W Thick Film Resistor (603) Vishay CRCW06035R1KJNEA
R3 1 1.5kΩ ±5% 1/10W Thick Film Resistor (603) Vishay CRCW06031K50JNEA
J2 1 16-Pin Boardmount Socket 3M 8516-4500JL
JU1 1 3-Pin Header
JU2–JU12 11 2 Pin Header
LM48100QMH U1 LM48100QMH (14-Pin HTSSOP-EP)
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