Tool/software:
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Tool/software:
Hello experts
Hi Lin.
1) For the requirement of the VIN. Usually, it's not recommended that you hit this min-off time, the expected output current may be affected. We generally recommend the customer leaves at lease 2V (5V is preferred) between Vin and Vout. For example, if your max output voltage is 30V, the min Vin is supposed to be 35V.
2) For the efficiency of 520-Q1. If other operating conditions - like fsw, L, Vled are same, as the Vin increases, the efficiency would slightly decrease. you can refer to below post and efficiency calculator. TPS92520-Q1: About the TPS92520 efficiency - Power management forum - Power management - TI E2E support forums
BR, Hailee.