PTC04

Programmer for Melexis PTC Devices

3901290014501

Page 8 of 15

Data Sheet

Rev 004

December/14

14.2 Power Supplies

The Power Supply input connector is a single input to supply the whole PTC. The Input supply requires a

minimum of 24 volts and can tolerate a maximum of 48 volts. It is not recommended to use a higher

voltage than needed for the application.

There’s an internal fuse (on the main board) of 1 A in order to

avoid damage when improperly used. The connected supply should provide a minimum current of 1.5 A

with peak capacity to source 10A.

The external Supply is the source to create all the internal requirements. Internal voltages are created on

the main board by using the input voltage from the external supply.

 +35V for drivers

(for the drivers or Programmable Power Supplies)

 +5V Digital

(Digital core as interface between PTC and Host application)

 +5V Analog

(measurement circuit with MUX and ADC)

 +3.3 V Digital

(Supply for the FPGA and USB)

14.3 Power Supply System Check

When something goes wrong it’s useful to check the status of all the above mentioned supplies.

The main board has the capability to measure all internal supplies. The only requirement is that the +5V

Digital supply is available. This is indicated by the red led on the rear panel of the programmer.

All the other supply could be checked by the Measurement system itself. Channels 8 till 11 are reserved

for this. The channel 8 is connected to the driver supply and is very useful to check the voltages of the

connected external supply. This can be useful to check when applications are launched where extra high

voltage is needed. Refer to the chapter “Measurement system” for more details about measuring these

channels. There are DLL functions available that will do these checks for you.

A typical diagnostic check will start with checking if the external supply is available. Then it will check if the

red led is lit. If these steps are ok, the diagnostics via software can be executed.

14.4 Supply Connector

This connector provides the PTC with power.

Any power source that generates a voltage between 24 and 48 V DC with a minimum current of 1.5 A is

allowed.

0V

+24-48V DC

Figure 14-2

There is an alternative connector on the main board (PWRCON1), parallel to the DC power supply socket.

0V

+24-48V DC

Figure 14-3

14.5 LED Indicators

Two Led indicators will help the user to check the status of the PTC

The red led shows that the core inside has power

The green led will show a busy status. If the Programmer is executing a job, the led will be on.

Figure 14-4