General Description
LD8526U1 is a secondary side synchronous rectification
(SR) driver IC. It is suited for flyback low side and high side
synchronous rectification in CCM, DCM and QR mode. For
forward freewheeling rectification application, LD8526U1
can be applied in CCM and DCM operation.
In light load condition, LD8526U1 will enter green mode to
reduce operation current by stopping SR MOSFET driving
function.
LD8526U1 can generate its own supply voltage through low
output voltage or high side rectification applications to
charge battery.

Features
 Suited for low side and high side flyback synchronous
rectification in CCM, DCM and QR(valley lock) mode
 Suited for forward freewheeling rectification in CCM
and DCM
 Self-supplying for operation with low output voltage
and/or high–side rectification without an auxiliary
winding.
 Suited for primary side with peak load function (max.
frequency 130kHz)
 Suited for PD application, which output voltage range
from 3V to 21V, and VCC range from 3V to 9V.
 Programmable turn-off level
 Fast turn-off total delay of 30ns
 200A ultra-low green mode operation current
 Gate source/sink capability: 0.5A/-3A

Applications
 Switching AC/DC adaptor and battery charger
 Open frame switching power supply