Announcements

From sunburn to sun earn – we’ve got the power! Watch our #poweringgreen videos now.

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
Mugi
Level 1
Level 1
First like received 5 sign-ins First question asked
0 Likes
1 Solution
Neo_Qin
Moderator
Moderator
Moderator
5 likes given 250 replies posted 250 sign-ins

Hi @Mugi ,

OSM: Output Sinking Mode

When the FB voltage is higher than 104% SS/VREF voltage but is below the OVP threshold, it triggers Output
Sinking Mode. During OSM operation, the Synchronous MOSFET remains ON to discharge the output until it hits
the -6 A negative current limit (NOCP_OSM). When it hits -6 A limit, the Synchronous MOSFET is turned OFF and
Control MOSFET is turned ON for TON time. Then the Control MOSFET is turned OFF and Synchronous MOSFET
is turned back ON. The device keeps this operation until the FB drops below 102% SS/VREF. Once FB drops below
102% SS/VREF, the device exits OSM.

BR,

Neo

View solution in original post

1 Reply
Neo_Qin
Moderator
Moderator
Moderator
5 likes given 250 replies posted 250 sign-ins

Hi @Mugi ,

OSM: Output Sinking Mode

When the FB voltage is higher than 104% SS/VREF voltage but is below the OVP threshold, it triggers Output
Sinking Mode. During OSM operation, the Synchronous MOSFET remains ON to discharge the output until it hits
the -6 A negative current limit (NOCP_OSM). When it hits -6 A limit, the Synchronous MOSFET is turned OFF and
Control MOSFET is turned ON for TON time. Then the Control MOSFET is turned OFF and Synchronous MOSFET
is turned back ON. The device keeps this operation until the FB drops below 102% SS/VREF. Once FB drops below
102% SS/VREF, the device exits OSM.

BR,

Neo