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{ |
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"ticketNumber" : "891261", |
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"reporterName" : "Michiaki Tanii", |
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"rankPoints" : "1600", |
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"resolutionStatus" : "TI Thinks Resolved", |
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"ticketName" : "TL494: Frequency configuration", |
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"rankName" : "Intellectual", |
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"replies" : " 3", |
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"views" : " 27", |
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"queryText" : "Part Number: TL494 Hi Referring 9.3.2 Oscillator, the equation is f = 1/(RT x CT) but TYP frequency is 10kHz at CT = 0.01uF, RT = 12k ohm in the 7.6 Electrical Characteristics, Oscillator Section. Could you kindly advise how customer should consider the frequency configuration ? Thank you and best regards, Michiaki", |
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"partNumber" : " TL494", |
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"allResponseList" : [ { |
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"contentId" : "3296841", |
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"userName" : "John Griffin1", |
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"rankPoints" : "32175", |
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"rankName" : "Mastermind", |
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"date" : "Mar 25, 2020 3:45 PM", |
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"userId" : "1693693", |
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"content" : "Hello Michiaki, This is some anomaly in the datasheet that goes all through revisions from Rev A to the present Rev H. Please use the curves in Figure 1 or the equation 3 in the datasheet to calculate the oscillator frequency. Thank you for pointing out this anomaly and I will try to find out why the test circuit uses a 12k resistor for Rt instead of a 10k. Regards John" |
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}, { |
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"contentId" : "3320709", |
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"userName" : "Michiaki Tanii", |
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"rankPoints" : "1600", |
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"rankName" : "Intellectual", |
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"date" : "Apr 20, 2020 4:12 AM", |
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"userId" : "6119109", |
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"content" : "Hi John, > I will try to find out why the test circuit uses a 12k resistor for Rt instead of a 10k. Regarding on the above, could you kindly update latest situation ? Thank you and best regards, Michiaki" |
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}, { |
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"contentId" : "3322914", |
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"userName" : "John Griffin1", |
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"rankPoints" : "32175", |
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"rankName" : "Mastermind", |
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"date" : "Apr 21, 2020 2:12 PM", |
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"userId" : "1693693", |
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"content" : "Hello Michiaki, I will let you know when I have an update Regards John" |
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} ], |
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"tags" : [ "/support/power-management/f/196/tags/TL494" ], |
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"fourmType" : "TI" |
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} |