SG1846 Microsemi Corporation, SG1846 Datasheet
SG1846
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SG1846 Summary of contents
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... 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- ...
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... Source/Sink Output Current (peak 200ns) .................... 200mA Reference Load Current ........................................... 0 to 10mA Oscillator Frequency Range ........................... 1KHz to 500KHz Note 3. Range over which the device is functiona ELECTRICAL CHARACTERISTICS (Unless otherwise specified, these specifications apply over the operating ambient temperatures for SG1846/SG1847 with - with - SG3846 with case temperatures equal to the ambient temperature ...
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... PIN 5 REF PIN 25° 40V 20mA SINK I = 100mA SINK I = 20mA SOURCE I = 100mA SOURCE C = 1nF 25° 1nF 25° SG1846 SG1846 SG3846 SG2846 Min. Typ. Max. Min. Typ. Max 3.9 4.35 3.9 4.35 2.5 2.3 2.5 2.3 3.9 3.9 2.5 2.5 1.2 1.5 1.2 1.5 0.5 5 ...
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... Min. Typ. Max. Min. Typ. Max. 7.7 8.0 0.75 0. state. = 10K , C = 4.7nF T T FIGURE 3. CURRENT SENSE THRESHOLD VS. ERROR AMPLIFIER OUTPUT FIGURE 6. OSCILLATOR PEAK VOLTAGE VS. TEMPERATURE L INFINITY Microelectronics Inc. 11861 Western Avenue (714) 898-8121 SG1846 Units 7.7 8 Garden Grove, CA 92841 FAX: (714) 893-2570 ...
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... Rev 1.1 2/94 Copyright 1994 FIGURE 8. CURRENT SENSE DELAY VS. TEMPERATURE FIGURE 11. ERROR AMP SINK CURRENT VS. TEMPERATURE FIGURE 14. SYNC PULSEWIDTH VS. TEMPERATURE 5 SG1846 FIGURE 9. SHUTDOWN DELAY TO OUTPUT VS. TEMPERATURE FIGURE 12. OUTPUT TRANSISTOR SATURATION VOLTAGE VS. OUTPUT CURRENT (SINK TRANSISTOR) FIGURE 15. SYNC PULSEWIDTH VS. TEMPERATURE L INFINITY Microelectronics Inc. 11861 Western Avenue ...
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... FIGURE 16. OSCILLATOR FREQUENCY VS. TEMPERATURE APPLICATION INFORMATION Oscillator frequency is approximated by the formula: f 4/90 Rev 1.1 2/94 Copyright 1994 FIGURE 17. OSCILLATOR FREQUENCY VS. TEMPERATURE FIGURE 19- OSCILLATOR FREQUENCY CURVES FIGURE 20 - OSCILLATOR CIRCUIT 6 SG1846 FIGURE 18. DUTY CYCLE VS. TEMPERATURE 2 INFINITY Microelectronics Inc. 11861 Western Avenue Garden Grove, CA 92841 ...
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... A small RC filter may be required in some applications to reduce switch transients. Differential input allows remote, noise free switching. FIGURE 23 - SINGLE ENDED BOOST CONFIGURATION 7 FIGURE 22 - CURRENT SENSE AMPCONNECTIONS L INFINITY Microelectronics Inc. 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 SG1846 FAX: (714) 893-2570 ...
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... APPLICATIONS INFORMATION 4/90 Rev 1.1 2/94 Copyright 1994 (continued) FIGURE 24 - BUCK CONVERTER WITH CURRENT SENSE WINDING FIGURE 25 - PUSH/PULL CONVERTER WITH SLOPE COMPENSATION 8 SG1846 L INFINITY Microelectronics Inc. 11861 Western Avenue Garden Grove, CA 92841 (714) 898-8121 FAX: (714) 893-2570 ...
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... FIGURE 27 - SOFT START AND SHUTDOWN/RESTART FUNCTIONS FIGURE 29 - SHUTDOWN WITHOUT AUTO-RESTART (LATCHED REF >3mA (LATCHED OFF REF If > 3mA the device will latch off R 1 until power is recycled. L INFINITY Microelectronics Inc. 11861 Western Avenue (714) 898-8121 SG1846 Garden Grove, CA 92841 FAX: (714) 893-2570 ...
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... DW - PACKAGE 16-PIN CERAMIC SG1846F/DESC FLAT PACK F - PACKAGE (Note 3) 20-PIN CERAMIC SG1846L/883B LEADLESS CHIP CARRIER SG1846L/DESC L - PACKAGE (Note 3) SG1846L Notes: 1. Contact factory for JAN and DESC part availability. 2. All parts are viewed from the top. 3. Consult factory for product availability. 4/90 Rev 1.1 2/94 Copyright ...