LX1701SPK EVAL KIT MICROSEMI, LX1701SPK EVAL KIT Datasheet - Page 2

• Manufacturer Part Number: LX1701SPK EVAL KIT
• Manufacturer: MICROSEMI

Specifications of LX1701SPK EVAL KIT

• Lead Free Status / RoHS Status: Supplier Unconfirmed

A
The LX1701 Evaluation Board is a fully functional filterless mono class-D amplifier. Connection to a single power supply, even
two AA batteries, one speaker, and an audio source like portable player or computer is all that is required to begin evaluating the
amplifier. The amplifier will support continuous output power levels up to 2W into 4 Ω load (<10% THD+N).
Board Setting
Copyright © 2004
Rev. 1.1, 2003-05-28
UDIO
1. Power and Ground Connections: The terminal J3 is for the power supply connection. VBAT is connected to the
2. Speakers Connection: J4 is the speaker output. Connect speaker “+” and “-“ to “OUT+/OUT+”. This evaluation
3. Audio Input Connection: J1 is the audio input connection. The positive audio inputs are connected to IN+ pin, while
4. “Enable/Disable” Jumper Setting: JP2 is the jumper for “Enable/Disable”. Enable jumper must be closed for normal
5. “BW_SEL” (Bandwidth Selection) Jumper Setting: JP3 is for low frequency cut off corner frequency selection.
6. “Gain” Jumper Setting: JP1 is the jumper for system gain selection. There are also two choices: 14dB if “14dB”
7. Output Selection Jumper Setting: JP4 & JP5 is the jumpers for LC filter or filterless output selection. Default setting
8. Test Set Up: R1/R2/R3/R4/R5 & C2/C3/C4/C5 are components for test purpose (refer to next page schematic), they
Actually this evaluation board is added a lot of optional components, or for test purpose, also some headers, terminals for
input and output, they are not necessary for the real application. The real component for this system is only one: C1, for
the power supply ripple. Another application board we made only has this one component on the board except for the IC,
you can find the schematic and picture in the page? It is sold separately.
MAX LX1701SPK EVAL
positive polarity of the power supply or battery (+1.8V ~ +5V); the GND is connected to the negative polarity of the
power supply or battery. Please make sure your power supply polarity connection and supply voltage is correct
before you start to evaluate the board.
board is designed for > 4 Ω speaker loads.
the negative inputs are connected to IN- pin. For single-ended audio input, the audio signal is connected to IN+ and
ground connected to IN-.
system operation.
There are two choices: one is 20Hz if “20Hz” position is closed; another one is 300Hz if “300Hz” position is closed.
position is closed; 8dB if “8dB” position is closed.
is filterless output, which “filterless+” and “filterless-“ positions are closed. L1/L2, C6/C7 are optional components
for LC filter output when “LC+” and “LC-“ positions are closed. L1/L2 could be inductors, or Ferrite Beads for long
speaker wires output to speaker.
are not necessary for the real application circuit. They make a second order RC filter cutting off the high switching
frequency, to measure the audio signal more precisely. R1 is an on-board load, can be 4~16Ω, 2W resistor, you also
can connect a resistor load off the board through the output terminal without on-board load. The probes just touch
“TESTOUT+” and “TESTOUT-“ test points, you can measure audio performance of the board
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
LX1701 Evaluation Board Quick Start Guide
Integrated Products
Microsemi
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UIDE
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