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Power Setup and Requirements
INTELLIGENT AC POWER SUPPLY
The Audio Module’s intelligent AC power supply
automatically selects the correct operating voltage
(allowing the Audio Module to be used internationally
without manually setting voltage switches) and eliminates
high in-rush currents with a soft-start power-up.
PROTECTION CIRCUITRY
The Audio Module is equipped with several power-
related protection circuits to prevent damage to the
Audio Module or the power distribution system:
• A power supply charging rate regulator ensures that
in-rush currents do not exceed the Maximum Input
Peak Current (MIPC) limit.
• A power supply capacity-based limiter regulates the
peak level of the audio signal, preventing amplifiers
from shutting down if the amplifier power supplies are
depleted (amplifier brown-out protection).
• Various current and voltage limiters protect drivers
from excessive excursion and excessive voice coil
temperature.
• A thermal limiter protects the amplifiers from
excessive temperature. Amplifiers shut down at
internal temperature values exceeding 70° C.
• The sensor-controlled subwoofer system is protected
by a multi-stage limiter chain of voice coil temperature
limiter, port velocity limiter, excursion limiter, current
and power limiter, current clamp, clip limiter, brownout
limiter, and a thermal protection control.
Summary of Contents for MD80-S
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