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SG3843Y Datasheet(PDF) 1 Page - Microsemi Corporation |
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SG3843Y Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 14 page P RODUCTION D AT A S HEET Microsemi Analog Mixed Signal Group 11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 1 SG1842/SG1843 Series C UR RENT M OD E PW M C ONTR O LLER Copyright © 2000 Rev. 1.6b 2010-03-15 DESCRIPTION The SG1842/43 family of control IC's provides all the necessary features to implement off-line fixed frequency, current-mode switching power supplies with a minimum number of external components. Current-mode architecture demonstrates improved line regulation, improved load regulation, pulse- by-pulse current limiting and inherent protection of the power supply output switch. The bandgap reference is trimmed to ±1% over temperature. Oscillator discharge current is trimmed to less than ±10%. The SG1842/43 has under-voltage lockout, current limiting circuitry and start-up current of less than 1mA. The totem-pole output is optimized to drive the gate of a power MOSFET. The output is low in the off state to provide direct interface to an N channel device. The SG1842/43 is specified for operation over the full military ambient temperature range of - 55°C to 125°C. The SG2842/43 is specified for the industrial range of -25°C to 85°C, and the SG3842/43 is designed for the commercial range of 0°C to 70°C. IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com PRODUCT HIGHLIG HT AC INPUT SG3842 R ST I ST V CC KEY FEA T URES OPTIMIZED FOR OFF-LINE CONTROL LOW START-UP CURRENT (<1mA) AUTOMATIC FEED FORWARD COMPENSATION TRIMMED OSCILLATOR DISCHARGE CURRENT PULSE-BY-PULSE CURRENT LIMITING ENHANCED LOAD RESPONSE CHARACTERISTICS UNDER-VOLTAGE LOCKOUT WITH 6V HYSTERESIS (SG1842 only) DOUBLE-PULSE SUPPRESSION HIGH-CURRENT TOTEM-POLE OUTPUT (1AMP PEAK) INTERNALLY TRIMMED BANDGAP REFERENCE 500KHZ OPERATION UNDERVOLTAGE LOCKOUT SG1842 - 16 volts SG1843 - 8.4 volts LOW SHOOT-THROUGH CURRENT <75mA OVER TEMPERATURE HI GH RELI ABI L I T Y FEATURES AVAILABLE TO MIL-STD-883B AND DSCC SCHEDULED FOR MIL-M38510 QPL LISTING RADIATION DATA AVAILABLE Microsemi LEVEL "S" PROCESSING AVAILABLE PACKAGE ORDER INFO M Plastic DIP 8-Pin N Plastic DIP 14-Pin DM Plastic SOIC 8-Pin D Plastic SOIC 14-Pin Y Ceramic Dip 8-Pin J Ceramic DIP 14-Pin F Cer Flatpack 10-Pin L Ceramic LCC 20-Pin TA (°C) RoHS / Pb-free Transition DC: 0503 RoHS / Pb-free Transition DC:0440 SG3842M SG3842N SG3842DM SG3842D SG3842Y SG3842J 0 to 70 SG3843M SG3843N SG3843DM SG3843D SG3843Y SG3842J SG2842M SG2842N SG2842DM SG2842D SG2842Y SG2842J -25 to 85 SG2843M SG2843N SG2843DM SG2843D SG2843Y SG2843J SG1842Y SG1842J SG1842F SG1842L -55 to 125 SG1843Y SG1843J SG1843F SG1842L SG1842Y/883B SG1842J/883B SG1842F/883B SG1842L/883B MIL- STD/883 SG1843Y/883B SG1843J/883B SG1843F/883B SG1843L/883B SG1842Y/DESC SG1842J/DESC SG1842F/DESC SG1842L/DESC DESC SG1843Y/DESC SG1843J/DESC SG1843F/DESC SG1843L/DESC Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. SG2843DM-TR) Plastic packages are RoHS compliant TM ® |
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