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SG1526B Datasheet(PDF) 1 Page - Microsemi Corporation |
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SG1526B Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 9 page Rev 1.1a 3.19.2005 Microsemi Inc. Copyright © 1994 11861 Western Avenue ∞ ∞ ∞ ∞ ∞ Garden Grove, CA 92841 1 (714) 898-8121 ∞ ∞ ∞ ∞ ∞ FAX: (714) 893-2570 SG1526B/SG2526B/SG3526B DESCRIPTION The SG1526B is a high-performance pulse width modulator for switching power supplies which offers improved functional and electrical characteris- tics over the industry-standard SG1526. A direct pin-for-pin replacement for the earlier device with all its features, it incorporates the following enhance- ments: a bandgap reference circuit for improved regulation and drift characteristics, improved undervoltage lockout, lower temperature coeffi- cients on oscillator frequency and current-sense threshold, tighter toler- ance on softstart time, much faster SHUTDOWN response, improved double-pulse supperession logic for higher speed operation, and an im- proved output driver design with low shoot-through current, and faster rise and fall times. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformer-less and transformer-coupled. The SG1526B is specified for operation over the full military ambient temperature range of -55 °C to 150°C. The SG2526B is characterized for the industrial range of -25 °C to 150°C, and the SG3526B is designed for the commercial range of 0 °C to 125°C. REGULATING PULSE WIDTH MODULATOR BLOCK DIAGRAM +V IN METERING F/F TOGGLE F/F MEMORY F/F R D R T C T GROUND Oscillator Reference Regulator Undervoltage Lockout Soft Start RESET C SOFTSTART COMPENSATION + ERROR — ERROR + C.S. — C.S. SHUTDOWN Q Q Q Q OUTPUT B +V C OUTPUT A +V IN FEATURES ••••• 8 to 35 volt operation ••••• 5V low drift 1% bandgap reference ••••• 1Hz to 500KHz oscillator range ••••• Dual 100mA source/sink ••••• Digital current limiting ••••• Double pulse suppression ••••• Programmable deadtime ••••• Improved undervoltage lockout ••••• Single pulse metering ••••• Programmable soft-start ••••• Wide current limit common mode range ••••• TTL/CMOS compatible logic ports ••••• Symmetry correction capability ••••• Guaranteed 6 unit synchronization ••••• Shoot thru currents less than 100mA ••••• Improved shutdown delay ••••• Improved rise and fall time HIGH RELIABILITY FEATURES - SG1526B ♦ ♦ ♦ ♦ ♦ Available to MIL-STD-883 ♦ ♦ ♦ ♦ ♦ MIL-M38510/12603BVA - JAN1526BJ ♦ ♦ ♦ ♦ ♦ Radiation data available ♦ ♦ ♦ ♦ ♦ LMI level "S" processing available Amp V REF To Internal Circuitry SYNC S R D S T Q |
Similar Part No. - SG1526B_1 |
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Similar Description - SG1526B_1 |
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