Amplifiers RoHS. MP400FC Datasheet
Power Operational Amplifiers
• 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
• Piezoelectric Positioning and Actuation
• Electrostatic Deflection
• Deformable Mirror Actuators
• Chemical and Biological Stimulators
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
Vin (10V to 50V)
15 14 13 12
AMP 2 Ilim
34 26 27 28 29 30 31 32 33 35 40 39 41
Analog -IN +IN -Vs
© Apex Microtechnology Inc.
All rights reserved
MP400U Rev G
Figure 2: Typical Connection
CN RN Q2D
2 MP400U Rev G
PINOUT AND DESCRIPTION TABLE
Figure 3: External Connections
Unused pins should be left open. This is mandatory for pins 3, 5, 7, 9, 11 and 16.
12, 13, 14, 15
21, 22, 23, 25
The output. Connect this pin to load and to the feedback resistor.
Connect to the current limit resistor, and then the OUT pin. Output current flows
into/out of this pin through RCL.
The positive supply rail. Leave open when using on-board SMPS.
The supply filter. When using the on-board SMPS, connect this pin to VB to power
the amplifier. This filters the SMPS current through a 47 μH inductor. The current to
this pin can not exceed 200 mA. See applicable section.
This is the output of the high voltage SMPS and typically is tied to pin 6, LFIN. Other
loads can be added to this pin as long as the maximum output power of the SMPS is
not exceeded. For proper operation, an external high voltage, low ESR capacitor
must be connected to this pin. See applicable section.
Drain node of the SMPS MOSFET switch. An external RC snubber may be connected
from this node to power ground to reduce or eliminate overshoot and ringing at
switch turn off, reducing switching noise on the SMPS.
Input voltage pins for the on-board high voltage switch mode power supply. Supply
with 10-50 V.
Input voltage pin for the boost controller circuitry. This pin is typically tied to VIN.
MP400U Rev G