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SD4872TR

Silan Microelectronics
Part Number SD4872TR
Manufacturer Silan Microelectronics
Description CURRENT MODE PWM + PFM CONTROLLER
Published Jul 2, 2015
Detailed Description Silan Microelectronics SD4872X_Datasheet CURRENT MODE PWM＋PFM CONTROLLER DESCRIPTION SD4872X is a current mode PWM c...
Datasheet PDF File SD4872TR PDF File

SD4872TR
SD4872TR

Overview
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 SD4872R SD4872R Material Pb free Pb free Pb free Pb free Packing Tube Tape & Reel Tube Tape & Reel HANGZHOU SILAN MICROELECTRONICS CO.
,LTD Http://www.
silan.
com.
cn REV:1.
1 2012.
09.
07 Page 1 of 10 Silan Microelectronics SPECIFICATIONS Part No.
SD4872 SD4872R Frequency 65kHz BLOCK DIAGRAM  SD4872 block diagram VDD 6 30V _ 5.
5V + + 27V _ R VDD OVP Latch S OVP 7 OVP OVP OTP 8 1 BO FB 2 OTP OTP BO BO 1.
5V - + S Restart SR POR Burst Mode SD4872X_Datasheet OLP Mode Auto-restart Auto-...


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