MP230 Apex Microtechnology, MP230 Datasheet - Page 5

• Manufacturer Part Number: MP230
• Description: POWER OPERATIONAL AMPLIFIER
• Manufacturer: Apex Microtechnology

MP230
any parasitic resistances RP, formed by socket and solder joints
as well as internal amplifi er losses.The current limiting resistor
may not be placed anywhere in the output circuit except where
shown in Figure 2. The value of the current limit resistor can
be calculated as follows: R
BOOST OPERATION
are operated at a higher supply voltages than the amplifier’s
high current output stage. +V
connected to the small signal stages. An additional 10V on the
+V
to drive the output stage into the triode region and improve
the output voltage swing for extra efficient operation when
required. When the boost feature is not needed +V
-V
must not be operated at supply voltages less than +V
-V
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This data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. All specifications are subject to change without notice.
With the boost feature the small signal stages of the amplifier
S
S
B
are connected to +V
respectively.
and -V
B
pin is sufficient to allow the small signal stages
B
and -V
LIM
B
= .65/I
(pin 1) and -V
B
respectively. +V
LIMIT
MP230U REV F DECEMBER 2004 © 2004 Apex Microtechnology Corp.
B
(pin 38) are
B
and -V
S
S
and
and
B
SHUTDOWN
(pin 8) relative to LSD (pin 7). This is a non-latching circuit. As
long as HSD remains high relative to LSD the output stage will
be turned off. LSD will normally be tied to signal ground but
LSD may float from -V
to lower quiescent current for standby operation or as part of
a load protection circuit.
BIAS CLASS OPTION
to pin 6 (Cc1) the quiescent current in the output stage is dis-
abled. This results in lower quiescent power, but also class
C operation of the output stage and the resulting crossover
distortion. In many applications, such as driving motors, the
distortion may be unimportant and lower standby power dis-
sipation is an advantage.
The output stage is turned off by applying a 5V level to HSD
Normally pin 5 (Iq) is left open. But when pin 5 is connected
B
to +V
B
- 10V. Shutdown can be used
CONSIDERATIONS
OPERATING
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