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SG1846L Datasheet(PDF) 1 Page - Microsemi Corporation |
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SG1846L Datasheet(HTML) 1 Page - Microsemi Corporation |
1 / 10 page CURRENT MODE PWM CONTROLLER FEATURES ••••• Automatic feed forward compensation ••••• Programmable pulse by pulse current limiting ••••• Automatic symmetry correction in push-pull configuration ••••• Enhanced load response characteristics ••••• Parallel operation capability for modular power systems ••••• Differential current sense amplifier with wide common mode range ••••• Double pulse suppression ••••• 200mA totem-pole outputs ••••• ± 1% bandgap reference ••••• Under-voltage lockout ••••• Soft-start capability ••••• Shutdown capability ••••• 500KHz operation HIGH RELIABILITY FEATURES - SG1846 ♦ ♦ ♦ ♦ ♦ Available to MIL-STD - 883 ♦ ♦ ♦ ♦ ♦ Radiation data available ♦ ♦ ♦ ♦ ♦ LMI level "S" processing available DESCRIPTION The SG1846 family of control ICs provides all of the necessary features to implement fixed frequency, current mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in im- proved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advan- tages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel “power modules” while maintaining equal current sharing. Protection circuitry includes built-in under-voltage lockout and programmable current limit in addition to soft start capability. A shutdown function is also available which can initiate either a complete shutdown with automatic restart or latch the supply off. Other features include fully latched operation, double pulse sup- pression, deadtime adjust capability, and a ±1% trimmed bandgap reference. BLOCK DIAGRAM SG1846/SG2846/SG3846 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 |
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