CURRENT MODE PWM + PFM CONTROLLER
Silan Microelectronics
SD4872X_Datasheet
CURRENT MODE PWM+PFM CONTROLLER
DESCRIPTION
SD4872X is a current mode PWM c...
Description
Silan Microelectronics
SD4872X_Datasheet
CURRENT MODE PWM+PFM CONTROLLER
DESCRIPTION
SD4872X is a current mode PWM controller IC for high
performance, low standby power offline flyback converter
application.
In no load or light load condition, the IC operates in Light Load
Mode to reduce switching loss and improve efficiency.
Large startup resistor could be used in the startup circuit to
minimize the standby current because of low startup current.
SD4872X offers complete protection functions including cycle-
by-cycle over current protection, over load protection, over
voltage and under voltage protections for VDD voltage, etc. Excellent EMI performance is achieved with frequency shuffling
technique and soft switching control at the totem pole gate
driver output.
FEATURES
APPLICATIONS
* Adapters
* Frequency shuffling to improve EMI performance
* Set-Top Box Power Supplies
* Light Load Mode for minimum standby power
* 65kHz switching frequency
* 10µA low startup current
* Internal LEB circuit
* VDD over-voltage and under-voltage protection * External programmable over-temperature protection
* Brown-out protection
* External programmable output over-voltage protection
* Over-power compensation
* Gate output voltage clamp
* Cycle-by-cycle current limiting
* Over load protection
* SOP8 package
ORDERING INFORMATION
Part No. SD4872 SD4872TR SD4872R SD4872RTR
Package SOP-8-225-1.27 SOP-8-225-1.27 SOP-8-225-1.27 SOP-8-225-1.27
Marking SD4872 SD4872 SD...
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