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.

特性 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