L
Liam
Hi
My company has had a long standing design based on the LT1371 in a
SEPIC configuration. Its worked fine in that application but we had a
bit of shock when we found its efficiency is only 55%.
Our new application requires as high a figure as possible.
The circuit used is the one in the data sheet. One possible problem is
that our application normally draws 80mA ( 55 % efficient ) but
occasionally requires a pulse of 0.5A.
The components are as shown on the circuit except for the diode which
is a MBRS340T3 and C2 which is an AVX TPS series ( could'nt get hold
the specified one ).
Does anyone have any idea where we've gone wrong. The linear tech
switchercad software reckons we should get 85% efficiency.
Thanks in advance
Liam
My company has had a long standing design based on the LT1371 in a
SEPIC configuration. Its worked fine in that application but we had a
bit of shock when we found its efficiency is only 55%.
Our new application requires as high a figure as possible.
The circuit used is the one in the data sheet. One possible problem is
that our application normally draws 80mA ( 55 % efficient ) but
occasionally requires a pulse of 0.5A.
The components are as shown on the circuit except for the diode which
is a MBRS340T3 and C2 which is an AVX TPS series ( could'nt get hold
the specified one ).
Does anyone have any idea where we've gone wrong. The linear tech
switchercad software reckons we should get 85% efficiency.
Thanks in advance
Liam