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