Other Parts Discussed in Thread: LM70880, LM5146
Tool/software:
Hi Team,
my customer are evaluating LM70840 and LM70880, from the simulation result for LM70840, the recommended inductance is 15uH and R_sense is 9mOhm. But same operating condition, the simulation for LM70880 is reommended 10uH and R_sense is 5mOhm. The operating conditions are Vin=30V-80V, Vout=12V, Iout=2.4A.
The questions are:
1. Why there are differences on passive elements selection?
2. If we replace LM70880 to LM70840, should we change the external circuit accordingly or we can shoose 15uH for LM50880?
A new operating conditions: Vin=30V-80V, Vout=8.5V with Iout=15A, do you recommend using 2*LM70880 parallel output for this application, or we should use LM5146+external MOSFET to realize it?
Thanks.
BRs.
Frank
