OPA2675: OPA2675 Design Application

?? ?

Part Number: OPA2675
Other Parts Discussed in Thread: LMH13000

Tool/software:

Hi, I want to use high-speed LTTL to load LED for communication. Can I use OPA2675 as the driver? Or is there any better solution?

3 months ago

0 Vikas Jeevannavar 3 months ago

TI__Expert 3005 points

Hi,

We have recently released LMH13000 which is more suitable to drive LEDs/Laser for communication. It also supports LVDS, TTL and CMOS logics with very fast rise and fall times for pulsed current-output applications.

0 ?? ? 3 months ago

Prodigy 10 points

If applied to a LIFI system, what is the highest Mbps communication supported by LMH13000? Can it drive a 30W LED?

0 Shreenidhi Patil 3 months ago in reply to ?? ?

TI__Expert 3946 points

Hello ,

can you please help me understand the forward voltage drop , current required to drive the LED for 30W. For example i would need these two parameter to calc if 30W LED can be driven.
The LMH13000 can drive 5A current with say ~ 10 to 15V drop on the load ( which is LED in this case ) since it support upto 18V.

Also can you help me give a spec on square waveform frequency you need on the current output waveform.
LMH13000 can drive up to 250MHz square waveform with 50% duty cycle. will this work to achieve your required communication speed.?

find the datasheet here : datasheet https://www.ti.com/lit/ds/symlink/lmh13000.pdf?ts=1748254002831&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FLMH13000

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OPA2675: OPA2675 Design Application