pswatw
Junior Member level 1
boost converter current limit
Hi:
I designed a VOLTAGE-MODE BOOST converter, it has current limit (1.5A) function. The principium of my current limit function is when the IL reache 1.5A
,The IC will turn the NMOS OFF and PMOS ON.
But, when i test the boost IC . It doesn't work correctly. When the IL reach the current 1.5A it will be limit in 1.5A for several seconds. but after several seconds the current will over 1.5A and the IC latch-up.
The question is when we design a current mode boost converter we need slope compensation to avoid the IC to be unstable. Now, I design the VOLTAGE-MODE BOOST converter current limit function , Do I need to use slope compensation to avoid the IC to be unstable.
THANKS!!
Hi:
I designed a VOLTAGE-MODE BOOST converter, it has current limit (1.5A) function. The principium of my current limit function is when the IL reache 1.5A
,The IC will turn the NMOS OFF and PMOS ON.
But, when i test the boost IC . It doesn't work correctly. When the IL reach the current 1.5A it will be limit in 1.5A for several seconds. but after several seconds the current will over 1.5A and the IC latch-up.
The question is when we design a current mode boost converter we need slope compensation to avoid the IC to be unstable. Now, I design the VOLTAGE-MODE BOOST converter current limit function , Do I need to use slope compensation to avoid the IC to be unstable.
THANKS!!