MP400FC
Power Operational Amplifiers
RoHS
COMPLIANT
FEATURES
• Low Cost
• Wide Common Mode Range
• Standard Supply Voltage
• Single Supply: 10V to 50V SMPS input
• Output Current: 150 mA Continuous
• Output Voltage 50V to 340V (single supply)
• 350 V/µs Slew Rate
• 200 kHz Power Bandwidth
• On-board Power Supply
APPLICATIONS
• Piezoelectric Positioning and Actuation
• Electrostatic Deflection
• Deformable Mirror Actuators
• Chemical and Biological Stimulators
DESCRIPTION
The MP400FC combines a high voltage, high speed precision power op amp with a supply voltage boost
function in an integrated thermally conductive module. The voltage boost function uses a switch mode power
supply (SMPS) to boost the input power supply voltage. This allows the user the benefits of using a standard
12 V or 24 V bus without the need to design a high voltage supply to power the op amp. The SMPS voltage is
adjustable from 50-350 V, allowing for op amp output voltages up to 340 V. External phase compensation pro-
vides the user with the flexibility to tailor gain, slew rate and bandwidth for a specific application. The unique
design of this amplifier provides extremely high slew rates in pulse applications while maintaining low quies-
cent current. The output stage is well protected with a user defined current limit. Safe Operating Area (SOA)
must be observed for reliable operation.
Figure 1: Equivalent Schematic
21
22
Vin (10V to 50V)
23
25
Vbias 24
15 14 13 12
L1
D1
SMPS
CONTROLLER
Q2
R7
R8
R14
R15
C6
8 Vboost
L2
6 LFin
4 +Vs
R17
37 Cr+
36 Cc+
1 Out
AMP 2 Ilim
42 Cc-
C8 R19
38 Cr-
34 26 27 28 29 30 31 32 33 35 40 39 41
Rset
Power GND
Analog -IN +IN -Vs
GND
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© Apex Microtechnology Inc.
All rights reserved
Aug 2017
MP400U Rev G
