OPA2333: Alternative to opa2333 with with supply voltage >12V

Fulvio De Persio

Part Number: OPA2333
Other Parts Discussed in Thread: LM5112, OPA735, OPA187, OPA2241

Dear All,

i'm simulating with TINA a high side voltage to current driver for a UV-LED based on TI disegn (slau502.pdf).

Unfortunatlly this uv led require at least 6.5V@5mA (and 7V@mA )so the opa2333 is not enough to reach the working point of the uv-led.

there is any other opa with the same (or close) values to the opa2333 that work with a supply voltage of 12V (or at least >9V).

Also i should pilot this led not only in continuos mode, but also in pulsed mode. So my idea was to open and close the led with a fast switching nmos (in conjuction with a lm5112 mos driver), any suggestion about which nmos could be usefull?

Thanks in advance to all.

over 5 years ago

0 Marek Lis over 5 years ago

TI__Guru 60570 points

Please take a look at OPA187 (Vs of 36V, GBW of 550kHz) or OPA735 (Vs of 12V, GBW of 1.6MHz)

0 Fulvio De Persio over 5 years ago in reply to Marek Lis

Prodigy 80 points

Marek Lis said:

Please take a look at OPA187 (Vs of 36V, GBW of 550kHz) or OPA735 (Vs of 12V, GBW of 1.6MHz)

Dear Marek,

thanks for the reply, i already try to simulate this opa but unfortunatly both of them generate a working point of 10.6V/255 mA on the diods, independently by the V used to pilot the circuit.

But seems that the opa2241/2251 work fine as the 2333.

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OPA2333: Alternative to opa2333 with with supply voltage >12V