Low Cost Open Frame Package, High Current 10A, 100V Power Amplifier0 pages
MP39 • MP39A
MP39 • MP39A
MP39, MP39A
Power Operational Amplifier
FEATURES
•t HIGH INTERNAL DISSIPATION — 125 Watts
•t HIGH VOLTAGE, HIGH CURRENT — 100V, 10A
•t HIGH SLEW RATE — 10V/µs
•t 4 WIRE CURRENT LIMIT SENSING
•t OPTIONAL BOOST VOLTAGE INPUTS
APPLICATIONS
•t LINEAR AND ROTARY MOTOR DRIVES
•t YOKE/MAGNETIC FIELD EXCITATION
•t PROGRAMMABLE POWER SUPPLIES TO ±45V
•t INDUSTRIAL AUDIO
•t PACKAGE OPTION - DIP10 - DUAL-IN-LINE
DESCRIPTION
The MP39 is a cost-effective high voltage MOSFET power
operational amplifier constructed with surface mount components on a thermally conductive but electrically isolated
substrate.
While the cost is low the MP39 offers many of the
same features and performance specifications found
in much more expensive hybrid power amplifiers.
The metal substrate allows the MP39 to dissipate
power up to 125 watts and its power supply voltages
can range up to +/- 50 Volts (100V total). Optional
boost voltage inputs allow the small signal portion
of the amplifier to operate at higher supply voltages
than the high current output stage. The amplifier is
then biased to achieve close linear swings to the
supply rails at high current for extra efficient operation. External compensation tailors performance to
the user needs. A four-wire sense technique allows
current limiting without the need to consider internal
or external mili-ohm parasitic resistance in the output line. An Iq pin is available which can be used to
shut off the quiescent current in the output stage.
The output stage then operates class C and lowers
quiescent power dissipation. This is useful in applications where output crossover distortion is not important.
EQUIVALENT SCHEMATIC
12 +Vs
+Vb 1
C1
GND 2
R1
R2
Q1A
13 +Vs
Q1B
C2
R3
Q5
14 +Vs
Q3
D1
R4
Q4
Cc2 4
Q9
Cc1 6
Q7
Q6
-IN 30
+IN 29
R5
Q10B
Q10A
R6
R7
23 -Ilim
R8
16 OUT
R9
17 OUT
R10
Q11
R11
GND 28
Q13
-Vb 26
Q14
R12
C3
15 OUT
Q8
Iq 25
www.apexanalog.com
MP39Ut t
t
24 +Ilim
R13
Copyright © Apex Microtechnology, Inc. 2012
t (All Rights Reserved)
Q12
18 -Vs
19 -Vs
20 -Vs
SEP 2012
1
MP39U REVJ