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SI9110 Datasheet(PDF) 1 Page - Vishay Siliconix |
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SI9110 Datasheet(HTML) 1 Page - Vishay Siliconix |
1 / 9 page Vishay Siliconix Si9110, Si9111 Document Number: 70004 S11-0975-Rev. I, 16-May-11 www.vishay.com 1 This document is subject to change without notice. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000 High-Voltage Switchmode Controllers FEATURES • 10 V to 120 V Input Range • Current-Mode Control • High-Speed, Source-Sink Output Drive • High Efficiency Operation (> 80 %) • Internal Start-Up Circuit • Internal Oscillator (1 MHz) • SHUTDOWN and RESET • Reference Selection Si9110 - ± 1 % Si9111 - ± 10 % DESCRIPTION The Si9110/9111 are BiC/DMOS integrated circuits designed for use as high-performance switchmode controllers. A high-voltage DMOS input allows the controller to work over a wide range of input voltages (10 to 120 VDC). Current-mode PWM control circuitry is implemented in CMOS to reduce internal power consumption to less than 10 mW. A push-pull output driver provides high-speed switching for MOSPOWER devices large enough to supply 50 W of output power. When combined with an output MOSFET and transformer, the Si9110/9111 can be used to implement single-ended power converter topologies (i.e., flyback, forward, and cuk). The Si9110/9111 are available in both standard and lead (Pb)-free 14-pin plastic DIP and SOIC packages which are specified to operate over the industrial temperature range of - 40 °C to 85 °C. FUNCTIONAL BLOCK DIAGRAM + - + + - + - + - FB COMP DISCHARGE OSC 14 13 9 8 7 2 V Ref Gen R S Q R S Q SENSE 3 5 4 11 12 Current-Mode Comparator C/L 1.2 V Undervoltage RESET 8.1 V 8.6 V BIAS Current Sources To Internal Circuits 10 1 6 2 Comparator Error Amplifier VREF VCC +VIN VCC SHUTDOWN 4 V OSC OUT OSC IN - VIN Pre-Regulator/Start-Up OUTPUT To VCC Comparator Clock (1/2 fOSC) - |
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