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SG1825C Dataheets PDF



Part Number SG1825C
Manufacturers Microsemi Corporation
Logo Microsemi Corporation
Description HIGH - SPEED CURRENT - MODE PWM
Datasheet SG1825C DatasheetSG1825C Datasheet (PDF)

THE INFINITE POWER OF INNOVATION SG1825C / SG2825C / SG3825C HIGH-SPEED CURRENT-MODE PWM PRODUCTION DATA SHEET DESCRIPTION The SG1825C is a high-performance pulse width modulator optimized for high frequency current-mode power supplies. Included in the controller are a precision voltage reference, micro power start-up circuitry, soft start, highfrequency oscillator, wideband error amplifier, fast current limit comparator, full double-pulse suppression logic, and dual totem pole output drivers.

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THE INFINITE POWER OF INNOVATION SG1825C / SG2825C / SG3825C HIGH-SPEED CURRENT-MODE PWM PRODUCTION DATA SHEET DESCRIPTION The SG1825C is a high-performance pulse width modulator optimized for high frequency current-mode power supplies. Included in the controller are a precision voltage reference, micro power start-up circuitry, soft start, highfrequency oscillator, wideband error amplifier, fast current limit comparator, full double-pulse suppression logic, and dual totem pole output drivers. Innovative circuit design and an advanced linear Schottky process result in very short propagation delays through the current limit comparator, logic, and output drivers. This device can be used to implement either current mode or voltagemode switching power supplies. It also is useful as a series-resonant controller to frequencies beyond 1MHz. The SG1825C is specified for operation over the full military ambient temperature range of -55°C to 125°C. The SG2825C is characterized for the industrial range of -25°C to 85°C, and the SG3825C is selected 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 HIGHLIGHT INITIAL OSCILLATOR ACCURACY 15 Sample Size = 279 Mean 401.661 Std. Dev. = 3.8 10 KEY FEATURES „ IMPROVED REFERENCE INITIAL TOLERANCE (±1% max.) „ IMPROVED OSCILLATOR INITIAL ACCURACY (±3% typ.) „ IMPROVED STARTUP CURRENT (500µA typ.) „ PROP DELAY TO OUTPUTS (50ns typ.) „ 10V TO 30V OPERATION „ 5.1V REFERENCE TRIMMED TO ±1% „ 2MHZ OSCILLATOR CAPABILITY „ 1.5A PEAK TOTEM-POLE DRIVERS „ U.V. LOCKOUT WITH HYSTERESIS „ NO OUTPUT DRIVER "FLOAT" „ PROGRAMMABLE SOFTSTART „ DOUBLE-PULSE SUPPRESSION LOGIC „ WIDEBAND LOW-IMPEDANCE ERROR AMPLIFIER „ CURRENT-MODE OR VOLTAGE-MODE CONTROL „ WIDE CHOICE OF HIGH- FREQUENCY PACKAGES Percentage of Units - % KEY FEATURES 5 „ AVAILABLE TO MIL-STD-883B „ MICROSEMI LEVEL "S" PROCESSING AVAIL. 0 390 395 400 405 410 415 Initial Oscillator Accuracy - KHz PACKAGE ORDER INFO TJ (°C) N Plastic DIP 16-Pin DW Plastic SOIC 16-Pin Q Plastic LCC 20-Pin RoHS Compliant / Pb-free RoHS Compliant / Pb-free Transition DC: 0503 Transition DC: 0516 0 to 70 -25 to 85 -55 to 125 MIL-STD-883 DESC SG3825CN SG2825CN - SG3825CDW SG2825CDW - SG32825CQ SG2825CQ - Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. SG3825CN-TR) J LCeramic DIP 16-Pin Ceramic LCC 20-Pin SG3825CJ SG282CJ SG1825CJ SG1825CJ/883B SG1825CJ/DESC SG1825CL SG1825CL/883 SG1825CL/DESC Copyright © 1994 Rev. 1.3a,2005-03-21 LINFINITY MICROELECTRONICS INC. 11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570 1 PRODUCT DATABOOK 1996/1997 SG1825C/SG2825C/SG3825C HIGH-SPEED CURRENT-MODE PWM NOT RECOMMENDED FOR NEW DESIGNS A B S O L U T E M A X I M U M R AT I N G S (Note 1) RoHS Peak Package Solder Reflow Temp. (40 sec. max. exp.)......................................................... 260° (+0, -5) Input Voltage .


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