SMC6MXX-XX Datasheet, PDF (10/15 Pages) Sensitron – Brushless DC Motor Driver Module in a Power Flatpack 80-200V, 50 Amp

SENSITRON
SEMICONDUCTOR
SMC6MXX-XX
SMC6MXX-XX-1
TECHNICAL DATA
DATA SHEET 1023, REV. D
Dir-in ( Pin 24 ), is the direction digital input. Logic “H’ correspond to forward rotation, and
logic “L” correspond to reversed rotation.
The direction input can be latched by Speed-in input. As long as Speed-in is less than
0.250V, the direction latch is transparent. When Speed-in is higher than 0.250V changing
direction of rotation will enable coast until the Speed-in drops below 0.250V. Direction latch is
recommended in two-quadrant operation mode to allow the motor to coast to a safe speed
before reversing.
CSH ( Pin 25 ),is the positive terminal of the current sense resistor.
CSL ( Pin 26 ),is the negative terminal of the current sense resistor.
The current sense terminals produce a differential voltage equal to the motor current times
the sense resistance (5 or 10 mΩ typical). There is an internal 2nF filter capacitor across pins
25 and 26, There is also a 100 Ω resistor between each pin and each end of the current
sense resistor. Pins 25 and 26 shall be externally connected to pins 12 and 13 to activate
the cycle-by-cycle current limiting.
+VDC Rtn ( Pins 27 & 28 ), are the motor supply return. Pins 27 and 28 should not be
connected to the signal Gnd pin 19.
Source Terminals ( Pin 29, 30, 34, 35, 39, 40 ), are the source terminals of the three arms
of the three-phase bridge. These pins shall be shorted together externally using a low
impedance bus to minimize power loss.
Phase C Outputs ( Pin 31, 32 ), are phase C terminals. Both terminals shall be used.
Phase B Outputs ( Pin 36, 37 ), are phase B terminals. Both terminals shall be used.
Phase A Outputs ( Pin 41, 42 ), are phase A terminals. Both terminals shall be used.
+VDC ( Pins 33, 38, 43 ), are the motor input power supply positive terminal. These pins
shall be shorted together externally using a low impedance bus. +VDC bus should bypassed
to +VDC Rtn with adequately voltage-rated low ESR capacitor, whose value can is least 10-
15µF per ampere of average motor current.
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