TMC-IDX TRINAMIC, TMC-IDX Datasheet - Page 14

• Manufacturer Part Number: TMC-IDX
• Description: DRIVE, STEPPER MOTOR, 3.5A
• Manufacturer: TRINAMIC

Specifications of TMC-IDX

• Supply Voltage Range: 12VDC To 48VDC
• Output Current: 3.5A
• Current Limit Max: 5A
• External Depth: 23mm
• External Length / Height: 63mm
• External Width: 63mm
• Load Current: 3.5A
• No. Of Output Channels: 2
• Supply: RoHS Compliant
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes

5.2 Connecting Motor and Power Supply
5.3 Power Supply Requirements
The power supply voltage shall be in the limits as given in the chapter 4 under operational ratings.
Please note that there is no protection against reverse polarity or too high voltage. The power supply
typically should be within a range which fits the motor requirements, as described in chapter 5.1.1.
When using supply voltages near the upper limit, a regulated power supply becomes a must. Please
ensure, that enough power filtering capacitors are provided in the system (1000µF for each ampere of
RMS motor current or more recommended), in order to absorb mechanical energy fed back by the
motor in stalling conditions. In larger systems a zener diode circuitry might be required, when motors
are operated at high velocities.
The power supply should be designed in a way, that it supplies the nominal motor voltage at the
desired maximum motor power. In no case shall the supply value exceed the upper / lower voltage
limit. To ensure reliable operation of the unit, the power supply has to have a sufficient output
capacitor and the supply cables should have a low resistance, so that the chopper operation does not
lead to an increased power supply ripple directly at the unit. Power supply ripple due to the chopper
operation should be kept at a maximum of a few 100mV.
Therefore we recommend to
The overall power rating mainly depends on the motor used and on the mechanical output power, i.e.
the motor velocity and desired torque. As a thumb rule, a 42mm class motor will require a 10W (short
motor) to 20W (long motor) power supply, while a 57mm motor will require 15W to 30W, when
operated at maximum rated current and low velocities. Operation at very high velocities will increase
the power demand up to the double value.
Copyright © 2005, TRINAMIC Motion Control GmbH & Co. KG
a) keep power supply cables as short as possible
b) use large diameter for power supply cables
c) if the distance to the power supply is large (i.e. more than 2-3m), use a robust 4700µF (IDX
7505) or 2200µF (IDX 4803) or similar additional filtering capacitor located near to the motor
driver unit. Choose the capacitor voltage rating fitting to the maximum operating voltage.
IDX
Figure 5.2: Connecting Motor and Power Supply
keep distance
short
C
Power supply