Saturday, November 16, 2013
L6203 DC Motor Controller
This DC motor controller circuit shown in this schematic use the L620x motor driver . The L620x is a monolithic full bridge switching motor driver realized in the new Multipower-BCD technology which allows the integration of multiple, isolated DMOS power transistors plus mixed CMOS/bipolar control circuits and is available in many versions : L6201 /1PS/2/3 .
L6203 DC Motor Controller Schematic
All this motor driver circuits are identically , the differences between them is the total RMS current , which is up to : 1A for L6201 , 2A for L6202 and 4A for L6203 and L6201PS . If the device is combined with a current regulator like the L6506 , can be implemented a transconductance amplifier for speed control, as shown in this circuit schematic . In this configuration only half of the L6506 is used and the other half of the device may be used to control a second motor.
The L6506 senses the voltage across the sense resistor RS to monitor the motor current: it compares the sensed voltage both to control the speed and during the brake of the motor. A snubber network made by the series of R and C must be foreseen very near to the output pins of the I.C.
The following formulas can be used to calculate the snubber values:
R @ VS/lp ; C = lp/(dV/dt) where:
VS is the maximum Supply Voltage foreseen on the application; Ip is the peak of the load current; dv/dt is the limited rise time of the output voltage (200V/ms is generally used).
of the IC. Sometimes a capacitor at pin 17 of the L6506 let the application better work.
L6203 DC Motor Controller Schematic
The L6506 senses the voltage across the sense resistor RS to monitor the motor current: it compares the sensed voltage both to control the speed and during the brake of the motor. A snubber network made by the series of R and C must be foreseen very near to the output pins of the I.C.
The following formulas can be used to calculate the snubber values:
R @ VS/lp ; C = lp/(dV/dt) where:
VS is the maximum Supply Voltage foreseen on the application; Ip is the peak of the load current; dv/dt is the limited rise time of the output voltage (200V/ms is generally used).
of the IC. Sometimes a capacitor at pin 17 of the L6506 let the application better work.
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