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SG3526 Datasheet(PDF) 1 Page - Microsemi Corporation |
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SG3526 Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 9 page 4/90 Rev 1.1 2/94 LINFINITY Microelectronics Inc. Copyright © 1994 11861 Western Avenue ∞ ∞ ∞ ∞ ∞ Garden Grove, CA 92841 1 (714) 898-8121 ∞ ∞ ∞ ∞ ∞ FAX: (714) 893-2570 SG1526/SG2526/SG3526 REGULATING PULSE WIDTH MODULATOR FEATURES ••••• 8 to 35 volt operation ••••• 5V reference trimmed to ±1% ••••• 1Hz to 350KHz oscillator range ••••• Dual 100mA source/sink outputs ••••• Digital current limiting ••••• Double pulse suppression ••••• Programmable deadtime ••••• 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 HIGH RELIABILITY FEATURES - SG1526 ♦ ♦ ♦ ♦ ♦ Available to MIL-STD-883B and DESC SMD ♦ ♦ ♦ ♦ ♦ Radiation data available ♦ ♦ ♦ ♦ ♦ LMI level "S"processing available DESCRIPTION The SG1526 is a high performance monolithic pulse width modulator circuit designed for fixed-frequency switching regulators and other power control applications. Included in an 18-pin dual-in-line package are a temperature compensated voltage reference, sawtooth oscillator, error amplifier, pulse width modulator, pulse metering and steering logic, and two low impedance power drivers. Also included are protective features such as soft-start and undervoltage lockout, digital current limiting, double pulse inhibit, a data latch for single pulse metering, adjustable deadtime, and provision for symmetry correction inputs. For ease of interface, all digital control ports are TTL and B-series CMOS compatible. Active LOW logic design allows wired-OR connections for maximum flexibility. This versatile device can be used to implement single-ended or push-pull switching regulators of either polarity, both transformerless and transformer coupled. The SG1526 is characterized for operation over the full military ambient junction temperature range of -55°C to +150°C. The SG2526 is characterized for operation from -25°C to +150°C, and the SG3526 is characterized for operation from 0°C to +125°C. +V IN To Internal Circuitry V REF METERING F/F TOGGLE F/F MEMORY F/F SYNC 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 S D S T Q Q Q R OUTPUT B +V C OUTPUT A BLOCK DIAGRAM +V IN Amp Q Q |
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