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SD4870C Datasheet(PDF) 1 Page - Silan Microelectronics Joint-stock |
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SD4870C Datasheet(HTML) 1 Page - Silan Microelectronics Joint-stock |
1 / 8 page CURRENT MODE PWM CONTROLLER SOP-8-225-1.27 DIP-8-300-2.54 SOT-23-6L DESCRIPTION SD4870 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 value startup resistor could be used in the startup circuit to minimize the standby current because of low startup current. SD4870 offers complete protection functions including cycle-by- cycle over current protection, over load protection, VDD input voltage over voltage and under voltage protection, etc. Excellent EMI performance is achieved with frequency shuffling technique and soft switching control at the totem pole gate driver output. FEATURES * Frequency shuffling to improve EMI performance * Light Load Mode for minimum standby power * External programmable switching frequency * 3uA low startup current * Internal LEB circuit * VDD over voltage and under voltage protection * Gate output maximum voltage clamp * Over current protection * Over load protection * SOT-23-6L/SOP8/DIP8 package APPLICATIONS * Battery Chargers * Adapters * Set-Top Box Power Supplies ORDERING INFORMATION Part No. Package Marking Material Packing Type SD4870TR SOT-23-6L 4870 Pb free Tape & Reel SD4870A DIP-8-300-2.54 SD4870A Pb free Tube SD4870C SOP-8-225-1.27 SD4870C Pb free Tube SD4870CTR SOP-8-225-1.27 SD4870C Pb free Tape & Reel HANGZHOU SILAN MICROELECTRONICS CO.,LTD REV:1.0 2009.09.22 Http://www.silan.com.cn Page 1 of 8 |
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