Other Parts Discussed in Thread: TPS650860EVM-116, PMP12004-HE, TIDA-01393
Hello,
My customer changed the U1 of the TPS650860EVM-116 to TPS6508640 and measured the efficiency of the TPS6508640 DC/DCs.
1. For the BUCK contoller 1/2/6, the efficiency is lower than PMP12004-HE test result for all available Iouts.
Vin=12V / Vout=3.3V / Inductor: blue=470nH, read=2.2uH
Vin=12V / Vout=0.85V / Inductor: blue=470nH, read=2.2uH
Vin=12V / Vout=1.2V / Inductor: blue=470nH, read=2.2uH
Please tell us what is the casue and how to improve it.
2. For the BUCK converter 3/4/5, the efficiency is lower than PMP12004-HE test result for low Iouts.
Vin=3.3V / Vout=1.4V / Inductor=470nH
Vin=3.3V / Vout=1.1V / Inductor=470nH
Vin=3.3V / Vout=1.8V / Inductor=470nH
Please tell us what is the casue and how to improve it.
Thank you.
JH