SI9120 Vishay Siliconix, SI9120 Datasheet
SI9120
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SI9120 Summary of contents
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... FEATURES D 10- to 450-V Input Range D Current-Mode Control DESCRIPTION The Si9120 is a BiC/DMOS integrated circuit designed for use in low-power, high-efficiency off-line power supplies. High-voltage DMOS inputs allow the controller to work over a wide range of input voltages (10- to 450-VDC). Current-mode PWM control circuitry is implemented in CMOS to reduce quiescent current to less than 1 ...
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... Si9120 Vishay Siliconix ABSOLUTE MAXIMUM RATINGS Voltages Referenced to −V (Note: V < ...
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... mA, Source or Sink OUT OUT 500 pF = 500 (Pin1). IN (Pin1). IN (Pin 1) and −V (Pin 6). IN Si9120 Vishay Siliconix LIMITS D Suffix −40 to 85_C Unit TEMP MIN TYP MAX Room 1000 2000 Room −2.0 −1 Room ...
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... Si9120 Vishay Siliconix TIMING WAVEFORMS 1.5 V − SENSE 50 90% OUTPUT 0 − FIGURE 50% SHUTDOWN 0 − RESET 0 − TYPICAL CHARACTERISTICS www.vishay.com 50 50% FIGURE 3. Output Switching Frequency vs. Oscillator Resistance 1 M 100 100 k r − Oscillator Resistance (W) ...
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... CC will be CC BIAS To properly set the bias for the Si9120, a 390-kW resistor should be tied from BIAS (pin 16) to −V determines the magnitude of bias current in all of the analog sections and the pull-up current for the SHUTDOWN and RESET pins. The current flowing in the bias resistor is nominally 15 mA ...
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... Nominal reference output voltage The trimming procedure that is used on the Si9120 brings the output of the error amplifier (which is configured for unity gain during trimming) to within " This compensates for input offset voltage in the error amplifier. ...