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SG1843

Microsemi Corporation
Part Number SG1843
Manufacturer Microsemi Corporation
Description CURRENT MODE PWM CONTROLLER
Published May 6, 2014
Detailed Description SG1842/SG1843 Series TM ® C U R R E N T M O D E P W M C O N T R O L L E R PRODUCTION DATA SHEET DESCRIPTION The SG1842/...
Datasheet PDF File SG1843 PDF File

SG1843
SG1843

Overview
SG1842/SG1843 Series TM ® C U R R E N T M O D E P W M C O N T R O L L E R PRODUCTION DATA SHEET DESCRIPTION The SG1842/43 family of control IC's provides all lockout, current limiting circuitry and start-up the necessary features to implement off-line fixed current of less than 1mA.
The totem-pole output frequency, current-mode switching power supplies is optimized to drive the gate of a power with a minimum number of external components.
MOSFET.
The output is low in the off state to Current-mode architecture demonstrates improved provide direct interface to an N channel device.
line regulation, improved load regulation, pulse- The SG1842/43 is specified for operation over by-pulse current limiting and inherent protection the full military ambient temperature range of of the power supply output switch.
The bandgap 55°C to 125°C.
The SG2842/43 is specified for reference is trimmed to ±1% over temperature.
the industrial range of -25°C to 85°C, and the Oscillator discharge current is trimmed to less SG3842/43 is designed for the commercial range than ±10%.
The SG1842/43 has under-voltage of 0°C to 70°C.
IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.
microsemi.
com PRODUCT HIGHLIGHT AC INPUT RST IST VCC SG3842 KEY FEATURES „ 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 HIGH RELIABILITY FEATURES „ AVAILABLE TO MIL-STD-883B AND DSCC „ SCHEDULED FOR MIL-M38510 QPL LISTING „ RADIATION DATA AVAILABLE „ Microsemi LEVEL "S" PROCESSING AVAILABLE Plastic DIP Plastic DIP TA (°C) M 8-...


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