This user guide supports the evaluation kit for the Motion SPM®7 Series. It should be
used in conjunction with the Motion SPM®7 datasheets as well as Fairchild’s application notes and technical support team. Please visit Fairchild’s websiteat
www.fairchildsemi.com.
1.1. Description
Fairchild’s Motion SPM®7 Series provides efficient motor control for energy restricted
small power inverter driven application when space is constrained, such as circulation
pump, compact fan.
Motion SPM®7 series integrates six fast-recovery MOSFETs (FRFET®) and one threephase High Voltage ICs (HVIC). Motion SPM®7 series reduces board space by utilizing
an ultra-compact 12.9 mm x 12.9 mm package and by incorporating built-in HVIC that
provide single supply MOSFET gate driving capability. The Motion SPM®7 series offers
designers high reliability with integrated Under-Voltage Lockout (UVLO), Thermal
Sensing Function (VTS) and Over-Current Protection (OCP).
1.2. Features
250 V/ 500 V 3-phase FRFET Inverter Including HVIC
Max. R
FSB70325: 1.4 Ω; FSB70625: 0.8 Ω
Separate Open-Source Pins from Low-Side MOSFETs for Three-Phase Current-
Sensing
Active-HIGH Interface, Works with 3.3 / 5 V Logic Schmitt-Trigger Input
Optimized for Low Electromagnetic Interference
HVIC Temperature-Sensing Built-In for Temperature Monitoring
HVIC for Gate Driving with Under-Voltage Protection and Interlock Function
Isolation Rating: 1500 V
Moisture Sensitive Level (MSL) 3
RoHS Compliant
Motion SPM®7 series is used as a highly integrated power module in this evaluation
board to realize an Inverter for Low Power BLDC or PMSM 3-phase motors.
The board need to be supplied on the DC-Bus with a DC-voltage specified prior. The
auxiliary-power-supply works as Buck-Converter and offers a stabilized 15 V to operate
the module. The voltage is also accessible on the connectors to supply a Microcontrollerboard if necessary. A LED indicates the presence of 15 V.
On the same connector of the DC-Bus, a motor can be connected to the Inverter output
terminals U, V, W.
The internal High-Side-Drivers of SPM®7 need bootstrap circuit which consists of
bootstrap capacitor, charge resistor and a fast diode.
The Shunts can be configured as 3-Shunt-sensing or single-Shunt-sensing.
Short-circuit protection is routed to just the W-phase and works in single-Shunt-sensing
for the complete module. In 3-Shunt-sensing, only W-phase is protected. A low-pass
Filter on Current-sensing avoids sensing of HF-peaks. The signal of fault output pin /FO
drops from high level to low when a fault, such as Under-Voltage (UV) or Short-circuit
Current (SC), occurs. A pull-up resistor and filter capacitor are added to generate a signal
out of the open-drain output.
RC low pass filters are used between input connector from a MCU (or DSP) and Logicinput signal pins of Motion SPM®7 series to suppress any occurring disturbances. All
Analog-Signals are filtered to provide smooth signals on the pins.
Replace components on the Evaluation Board only with those parts shown on the parts list (or Bill of Materials) in the Users’ Guide. Contact an
authorized Fairchild representative with any questions.
This board is intended to be used by certified professionals, in a lab environment, following proper safety procedures. Use at your own risk. The
Evaluation board (or kit) is for demonstration purposes only and neither the Board nor this User’s Guide constitute a sales contract or create any kind
of warranty, whether express or implied, as to the applications or products involved. Fairchild warrantees that its products meet Fairchild’s published
specifications, but does not guarantee that its products work in any specific application. Fairchild reserves the right to make changes without notice to
any products described herein to improve reliability, function, or design. Either the applicable sales contract signed by Fairchild and Buyer or, if no
contract exists, Fairchild’s standard Terms and Conditions on the back of Fairchild invoices, govern the terms of sale of the products described herein.
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