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FRS3A Datasheet When poweris first applied, C3 charges to typically 5.7 volts before TOPSwitch starts. C3 then provides TOPSwitch bias current until the output voltage becomes regulated. When the output voltage becomes regulated, series connected Zener diodes VRl and VR2 begin to conduct, drive current into the TOPSwitch control pin, and directly control the duty cycle. C3 together with R3 perform low pass filtering on the feedback signal to prevent output line frequency ripple voltage from varying the duty cycle. For more information, refer to Design Note DN-7. FRS3A Price
FRS3A on stock FEATURES coWide supply voltage range of l.2V t0 3.6V coFlow-through pin-out architecture coln accordance with JEDEC standard no. 8-1A coCMOS low power consumption coDirect interface with TTL levels c05 Volt tolerant inputs/outputs, for interfacing with 5 Volt logic Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. @ The ST logo is a trademark of STMicroelectronics |
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