SCM1240M Datasheet, PDF (1/18 Pages) Allegro MicroSystems – High Voltage, High Current 3-Phase Motor Drivers

SCM1240M
High Voltage, High Current 3-Phase Motor Drivers
Features and Benefits
▪ Each half-bridge circuit consists of a pre-driver circuit that
is completely independent from the others
▪ 10 to 30 A continuous output IPM in a small-footprint
package
▪ Protection against simultaneous high- and low-side turning on
▪ Bootstrap diodes with series resistors for suppressing
inrush current are incorporated
▪ CMOS compatible input (3.3 to 5 V)
▪ Designed to minimize simultaneous current through both
high- and low-side IGBTs by optimizing gate drive resistors
▪ Integrated Fast Recovery Diode (FRD) as freewheeling
diode for each IGBT
▪ UVLO protection with auto restart
▪ Thermal shutdown (TSD) with auto restart
▪ Fault (¯F¯O¯ indicator) signal output at protection activation:
UVLO (low side only), OCP, STP, and TSD
▪ Proprietary power DIP package
▪ UL Recognized Component (File No.: E118037)
Packages: Power DIP
Not to scale
Description
The SCM1240M inverter power module (IPM) devices provide
a robust, highly-integrated solution for optimally controlling
3-phase motor power inverter systems and variable speed
control systems used in energy-conserving designs to drive
motors of residential and commercial appliances. These ICs
take 85 to 253 VAC input voltage, and 10 to 30 A (continuous)
output current. They can withstand voltages of up to 600 V
(IGBT breakdown voltage).
The high current SCM1240M employs a new, small-footprint
proprietary DIP package. The IC itself consists of all of the
necessary power elements (six IGBTs), pre-drive ICs (three),
and freewheeling diodes (six), needed to configure the main
circuit of an inverter, as well as a bootstrap circuit (three
bootstrap diodes and three boot resistors) as a high-side drive
power supply. This enables the main circuit of the inverter to
be configured with fewer external components than traditional
designs.
Applications include residential white goods (home appliances)
and commercial appliance motor control, such as:
▪ Air conditioner compressor motor
▪ Air conditioner fan motor
▪ Refrigerator compressor motor
▪ Washing machine main motor
Fully molded
LF 2551
SCM1240MDS-Rev. 5
Heatsink pad
LF2552
Functional Block Diagram
VB
HS
BootDi
R_B
One of three phases
SCM1240M
VBB
UV
UV
MIC
VCC
Detect
Detect
HIN
Input Logic
LIN
Level
Shift
Drive
Circuit
FRD
U,V,W
COM
STP
FO
Drive
Circuit
O.C.
Thermal
FRD ^LS
OCP
Protect Protect
Figure 1. Diagram of one of three phases in the device.
SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/