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SG1842Y Datasheet(PDF) 1 Page - Microsemi Corporation |
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SG1842Y Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 14 page Copyright © 2000 Rev. 1.6 4/00 FOR FUR THER INFORMA TION CALL (714) 898-8121 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841 1 C URRENT M ODE PWM C ONTROLLER P RODUCTION D AT A S HEET T HE I NFINITE P OWER OF I NNOV A TION SG1842/SG1843 Series LIN DOC #: 1842 DESCRIPTION KEY FEA TURES s OPTIMIZED FOR OFF-LINE CONTROL s LOW START-UP CURRENT (<1mA) s AUTOMATIC FEED FORWARD COMPENSATION s TRIMMED OSCILLATOR DISCHARGE CURRENT s PULSE-BY-PULSE CURRENT LIMITING s ENHANCED LOAD RESPONSE CHARACTERISTICS s UNDER-VOLTAGE LOCKOUT WITH 6V HYSTERESIS (SG1842 only) s DOUBLE-PULSE SUPPRESSION s HIGH-CURRENT TOTEM-POLE OUTPUT (1AMP PEAK) s INTERNALLY TRIMMED BANDGAP REFERENCE s 500KHZ OPERATION s UNDERVOLTAGE LOCKOUT SG1842 - 16 volts SG1843 - 8.4 volts s LOW SHOOT-THROUGH CURRENT <75mA OVER TEMPERATURE 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- PRODUCT HIGHLIGHT P A CKAGE O RDER I NFORMA TION T A (°C) 0 to 70 SG3842M SG3842N SG3842DM SG3842D SG3842Y SG3842J — — SG3843M SG3843N SG3843DM SG3843D SG3843Y SG3843J — — -25 to 85 SG2842M SG2842N SG2842DM SG2842D SG2842Y SG2842J — — SG2843M SG2843N SG2843DM SG2843D SG2843Y SG2843J — — -55 to 125 — — — — SG1842Y SG1842J — SG1842L — — — — SG1843Y SG1843J — SG1843L MIL-STD/883 — — — — SG1842Y/883B SG1842J/883B — SG1842L/883B — — — — SG1843Y/883B SG1843J/883B — SG1843L/883B DESC — — — — SG1842Y/DESC SG1842J/DESC SG1842F/DESC SG1842L/DESC — — SG1843Y/DESC SG1843J/DESC SG1843F/DESC SG1843L/DESC TYPICAL APPLICATION OF SG3842 IN A FLYBACK CONVERTER HIGH RELIABILITY FEATURES s AVAILABLE TO MIL-STD-883B AND DESC SMD s SCHEDULED FOR MIL-M38510 QPL LISTING s RADIATION DATA AVAILABLE s LINFINITY LEVEL "S" PROCESSING AVAILABLE Note: All surface-mount packages are available in Tape & Reel. 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. Plastic DIP 8-pin M Plastic DIP 14-pin N Plastic SOIC 8-pin DM Plastic SOIC 14-pin D Ceramic DIP 8-pin Y Ceramic DIP 14-pin J Cer. Flatpack 10-pin F Ceramic LCC 20-pin L AC INPUT SG3842 R ST I ST V CC |
Similar Part No. - SG1842Y |
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Similar Description - SG1842Y |
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