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LM3423: Need help to simulate & measure the on time of LED driver

Part Number: LM3423

I am planning to use LM3423 in buck configuration with an input voltage of 25V and the maximum output current of 5A at 19.6Volt.

But I didn't get any reference design in Pspice for TI of LM3423 with buck configuration.

So pls provide a reference design of LM3423 in BUCK mode for Pspice for TI tool to simulate.