TMCM-1160 V1.01 Hardware Manual (Rev. 1.02 / 2013-JUL-23)

8

www.trinamic.com

3.2.1 Power Connector

This module offers separate power supply inputs for digital logic (pin 2) and driver/power stage (pin 1).

Both supply inputs use common ground connections (pin 4). This way, power supply for the driver stage

may be switched off while still maintaining position and status information when keeping digital logic

supply active. Due to internal diode the digital logic supply has to be equal or higher than the

driver/power stage supply. Otherwise the diode between driver/power stage supply and digital logic

supply might short the separate supplies.

In case power supply is provided only to the power section (pin 1) an internal diode will distribute

power to the logic section. So, when separate power supplies are not required it is possible to just use

pin 1 and 4 for powering the module. If so, pin 2 (logic supply) and pin 3 (/SHUTDOWN input) can be

connected together in order to enable the driver stage.

Connect /SHUTDOWN input to +U

open or connecting it to ground will disable driver stage.

A 4-pin JST EH series B4B-EH connector is used as power connector on-board.

4

1

Pin

Label

Description

1

+V

Driver

Module + driver stage power supply input

2

+V

Logic

(Optional) separate digital logic power supply input

3

/SHUTDOWN

Shutdown input. Connect this input to +V

to activate driver stage. Leaving this input open or connecting it

to ground will disable driver stage

4

GND

Module ground (power supply and signal ground)

Table 3.2 Connector for power supply

3.2.1.1 Power Supply

For proper operation care has to be taken with regard to the power supply concept and design. Due to

space restrictions the TMCM-1160 includes about 20 µF / 100 V of supply filter capacitors. These are

ceramic capacitors which have been selected for high reliability and long life time.

-

Keep power supply cables as short as possible.

-

Use large diameters for power supply cables.

Add external power supply capacitors!

It is recommended to connect an electrolytic capacitor of significant size (e.g. 2200 µF / 63

V) to the power supply lines next to the TMCM-1160 especially if the distance to the power

supply is large (i.e. more than 2-3m)!

Rule of thumb for size of electrolytic capacitor:

In addition to power stabilization (buffer) and filtering this added capacitor will also

reduce any voltage spikes which might otherwise occur from a combination of high

inductance power supply wires and the ceramic capacitors. In addition it will limit slew-

rate of power supply voltage at the module. The low ESR of ceramic-only filter capacitors

may cause stability problems with some switching power supplies.