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This circuit is simpler version of my current setup. I have connected these high power LEDs in parallel and controlling its intensity level using PWM signal generated by FPGA. The AC to DC converter which I am using currently gives max current of 2.2 Amps. In total 32 LEDS are connected to this power source in similar way. My requirement is to monetarily boost the intensity of LEDs to it peak value.So I am thinking to to use Lead Acid battery which will boost the current and intensity of LEDs will be at its peak. This switching between DC supply from converter and from battery should be controllable and with minimum switching delay.How should I approach in designing this circuit.

DataSheet of LED [BXRA-56C5300] http://www.bridgelux.com/sites/default/files/resource_media/DS25-Bridgelux-RS-Array-Data-Sheet-2014.01.27.pdf

Thanks!

Datasheet of power transistor used https://www.infineon.com/dgdl/Infineon-IPP_B_I80P04P4L-08-DS-v01_01-EN.pdf?fileId=5546d4625c167129015c348992484d42

schematic

simulate this circuit – Schematic created using CircuitLab

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    \$\begingroup\$ What is the question? \$\endgroup\$
    – Ron Beyer
    Nov 13, 2017 at 15:20
  • \$\begingroup\$ @RonBeyer how should I approach in designing this switching circuit. I was thinking to use High side OR-ing FET controller.Please consult with other options \$\endgroup\$
    – S K
    Nov 13, 2017 at 15:24
  • \$\begingroup\$ Due to wide variance in Vf vs tolerance and temp, you must use a CC linear or switching regulator on low or high side with PWM if you want dim control. Can't you make SMPS 26V? or 2.2A current source? Do you really have 32x 50W chips? How many hours of power did you expect? \$\endgroup\$ Nov 13, 2017 at 16:11
  • \$\begingroup\$ Hope you are aware of significant cooling design required like an overclocked CPU. \$\endgroup\$ Nov 13, 2017 at 16:17
  • \$\begingroup\$ @TonyStewart.EEsince'75 yes . In total I am using 64 50W LEDs. 32 are powered using each AC to DC 24V converter. Since forward voltage of these LEDs is high I had to connect them in parallel. The requirement is to supply high current for time duration of max 2 sec so LEDs will glow at max intensity. The max rated current for these LEDs is 4 Amps. I need each LED to glow at its max intensity for this duration in order to trigger photosynthesis activity . \$\endgroup\$
    – S K
    Nov 13, 2017 at 16:19

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schematic

simulate this circuit – Schematic created using CircuitLab

Open collector comparator shown

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