Controller Power

Controller Power

 

 

 

 

Mot1(-)

 

 

 

 

Mot1(+)

Channel 1 MOSFET Power Stage

 

5Vmin

VBatt Vmot

 

 

 

40V max

GND

 

 

 

 

 

 

 

Power

 

 

ENABLE

Control

Microcomputer &

9.5V min

&Backup

 

10.5V min

 

 

MOSFET Drivers

13V max

DC/DC

 

40V max

GND

 

 

 

 

 

 

 

Channel 2 MOSFET Power Stage

 

5Vmin

GND

 

40V max

VBatt Vmot

 

 

 

 

 

 

 

 

 

 

 

Mot2(+)

 

 

 

 

Mot2(-)

FIGURE 9. Representation of the AX3500’s Internal Power Circuits

When powered only via the Power Control input, the controller will turn On but motors will not be able to turn until power is also present on the VMot tabs

The Power Control input also serves as the Enable signal for the DC/DC converter. When floating or pulled to above 1V, the DC/DC converter is active and supplies the AX3500’s microcomputer and drivers, thus turning it On. When the Power Control input is pulled to Ground, the DC/DC converter is stopped and the controller is turned Off.

The Power control tab MUST be connected to Ground to turn the Controller Off. For turn- ing the controller On, even though the Power Control may be left floating, whenever possi- ble pull it to an unfused12V or higher voltage to keep the controller logic solidly On. You may use a separate battery to keep the controller alive as the main Motor battery dis- charges.

The table below shows the state of the controller depending on the voltage applied to Power Control and Vmot.

TABLE 3. Controller Status depending on Power Control and VMot

Power Control input is

And Main Battery

 

connected to

Voltage is

Action

Ground

Any Voltage from 0V to 40V

Controller is Off

 

 

 

Floating

0V

Controller is Off. Not Recom-

 

 

mended Off Configuration.

 

 

 

Floating

Between 8V and 10.5V

Controller Logic is On

 

 

Power Stage is Disabled (under-

 

 

voltage condition)

 

 

 

Floating

Between 10.5 and 40V

Controller is On.

 

 

Power Stage is Active

 

 

 

AX3500 Motor Controller User’s Manual

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RoboteQ AX3500 user manual Controller Power, Power Control input is, And Main Battery, connected to, Voltage is, Action