Technical support / CGD1200HB2P-BM2

Lexos69

Hi everyone,

I am writing to report a small problem with the CGD1200HB2P-BM2 driver board that I acquired on DigitKey.

The 2 pictures below represent what I am trying to achieve with the assembly's electric circuit. The first image shows the working capacitor being charged by a DC power supply; ''CHARGING MODE''. The second image illustrates that same capacitor discharging on the load, a Laser; ''FIRING MODE''.

CHARGING MODE

FIRING MODE

Now, we did multiple tests.

In the first test, everything works as expected in the setting. The laser flashes by being supplied with 30 Volts coming from a DC-DC step up booster power supply. At each flash, the laser turns on for 200 microseconds and stays off for 200 milliseconds. Hence, we have a 0.1% duty cycle at 5 Hz.

However, on the second test and others, we see that the CGD1200HB2P-BM2 board stops working when trying to operate the Laser with 40 Volts using the same duty cycle and frequency. The DT6 indicator lights up red.

We have tried other duty cycles as well. No matter the pulse width or frequency setup, The same thing keeps on happening for any voltage above 30 Volts.

What is interrupting the system ?

Am I missing something ?

Sincerely,