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AMC7834: Pulsed closed-loop mode

Aidar Gainetdinov
Prodigy 10 points

Part Number: AMC7834

Hello,

I am designing pulsed power amplifier with GaN HEMTs. I want to use AMC7834 for closed-loop mode and generate pulse sequences by switching HEMT's gate voltages (from Vg_on to Vg_off (nearly -5 V) and vice versa). Is the closed-loop mode with pulsing realizable? As I understand, I can set VCLAMPx pin to +1.3 V and control SLEEPx pin to switching DAC output between Vg_on (define by HEMT's drain current) and -4.9 V. Is it works this way? Can I get rise/fall time of pulse no more than 5 us and provide current stability in pulses?

Thanks,

Aidar

  • 0
    TI__Guru 57063 points

    Hi Aidar,

    We specify that a max on/off time from sleep as 5µs each, so a pulse would be max 10µs.  It will also be dependent on the load of the output.

    If you want to email me directly, I could send some information about another device we have that might be better for your application. 

    frost@ti.com

    Thanks,

    Paul