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I need to drive 4 MOSFETs with PWM of certain set frequency, whose outputs are connected to batteries. These 4 batteries are in series. I need to isolate input and output. Can I use a single Isolated DC-DC converter to power all 4 opto-couplers. I am using TLP350 as gate driver.

The main reason for using single isolated power source is to reduce cost. If this doesn't work how else can I power multiple opto-coupler with low cost?

For reference in figure: OC: opto-coupler. Vcc is from the output of Isolated DC-DC Converter. connection depection

Proposed circuit: Architecture of circuit in the left. Right side image indicates the sub-circuit. d and e are PWM inputs proposed circuit

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  • 2
    \$\begingroup\$ Show the full proposed circuit. \$\endgroup\$ – Andy aka Nov 7 '19 at 10:39
  • \$\begingroup\$ Have aded the proposed circuit. \$\endgroup\$ – Amrutha B V Nov 7 '19 at 11:08
  • \$\begingroup\$ FULL proposed circuit. I can't see any optocouplers in your circuit, \$\endgroup\$ – winny Nov 7 '19 at 11:35
  • \$\begingroup\$ optocouplers are connected to drive the MOSFET. V01 to drive MOSFET 1, Vo2 to drive MOSFET 2 and so on.Circuit design/ complete architecture cannot be shared. \$\endgroup\$ – Amrutha B V Nov 7 '19 at 11:54

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