EVALUATION KIT
FOR PA04 PIN-OUT
EK04
TYPICAL APPLICATION
The PA04 is well suited for wideband, low distortion, high
powerapplications.ThecircuitinFigure4displaysthesimplicity
of use offered by the PA04. The circuit is in an inverting gain of
10. This relatively low gain allows the amplifier to have more
than adequate loop gain available, resulting in extremely low
distortion at the power levels delivered. The use of the invert-
ing configuration avoids any concern of common mode effects.
Typical specs of such a circuit would read as follows:
Po = 200W
F = 10kHz
RL = 4 Ohms
THD = .0061
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OPTIONAL V BOOST
extends the common mode range of the amplifier. The ground
connection of J3 needs to be made when assembled.
One of many inexpensive ways to acquire V boost for the
PA04 has been included as an option on this evaluation kit.
The addition of these parts not only increases swing, but also
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HS11 HEATSINK NOTE
The HS11 Heatsink is overkill for the average application. Once maximum power dissipation for the application is determined
(refer to “General Operating Considerations” and Application Note 11 in the APEX DATABOOK), the final mechanical design will
probably require substantially less heatsinking.
APEXMICROTECHNOLOGYmakesnorepresentationthattheuseorinterconnectionofthecircuitsdescribedhereinwillnotinfringe
onexistingorfuturepatentrights, nordothedescriptionscontainedhereinimplythegrantingoflicensestomake, use, orsellequip–
ment constructed in accordance therewith.
4APEX MICROTECHNOLOGY CORPORATION • 5980 NORTH SHANNON ROAD • TUCSON, ARIZONA 85741 • USA • APPLICATIONS HOTLINE: 1 (800) 546-2739
APEX [ CIRRUS LOGIC ]
