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SI9100DN02
3-W High-Voltage Switchmode Regulator
Si9100
Vishay Siliconix
3-W High-Voltage Switchmode RegulatorFEATURES 10- to 70-V Input Range Current-Mode Control On-Chip 150-V, 5-� MOSFET Switch Reference SelectionSi9100 − �1% High Efficiency Operation (> 80%) Internal Start-Up Circuit Internal Oscillator (1 MHz) SHUTDOWN and RESET
DESCRIPTION
The Si9100 high-voltage switchmode regulators are
monolithic BiC/DMOS integrated circuits which contain most ofthe components necessary to implement high-efficiency
dc-to-dc converters up to 3 watts. They can either be operatedfrom a low-voltage dc supply, or directly from a 10- to 70-V
unregulated dc power source. The Si9100 may be used withan appropriate transformer to implement most single-endedisolated power converter topologies (i.e., flyback and forward),
or by using a level shift circuit can generate a +5-V or a −5-V
non-isolated output from a −48-V source.
The Si9100 is available in both standard and lead (Pb)-free14-pin plastic DIP and 20-pin PLCC packages which are
specified to operate over the industrial temperature range of−40 �C to 85 �C. COMP DISCHARGE
DRAIN
SOURCE
RESET
9.4 V
BIAS To
Internal
1 (2)
ErrorAmplifier
VREF
VCC
+VIN
OSCOUTOSCIN
Note: Figures in parenthesis represent pin numbers for 20-pin package.
−VIN(BODY)
