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TB1254N Datasheet(PDF) 50 Page - Toshiba Semiconductor |
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TB1254N Datasheet(HTML) 50 Page - Toshiba Semiconductor |
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50 / 58 page  Ver3.7 00/01/28 50 Note Items/Symbols Bus conditoins Measurement methods D20 V. Ramp DC on Service Mode / VNOVRAMP V STOP:1 Others:Preset (1)Set V STOP to 1. (2)Measure the DC level of Pin24, that is "VNOVRAMP". D21 Vertical Pull-in Range (Auto) / FVPAUL / FVPAUH Vertical Pull-in Range (50Hz) / FVP50L / FVP50H Vertical Pull-in Range (60Hz) / FVP60L / FVP60H V-Freq: 000/001/010 Others:Preset (6) Input a composite sync signal into Pin38. (7) For V-Freq 000/001/010, increasing the input vertical period from 220H by 0.5H step, measure the period at which input signal synchronized with V Ramp(Pin24), that is "FVPAUL" /” FVP50L”/ "FVP60L". (8) (3)For V-Freq 000/001/010, decreasing the input vertical period from 360H by 0.5H step, measure the period at which input signal synchronized with V Ramp, that is "FVPAUH" /” FVP50H”/ "FVP60H". D22 Vertical Period on Fixed Mode / TV3125 / TV2625 / TV313 / TV263 V-Freq: 100/101/110/ 111 Others:Preset For V-Freq 100/101/110/111, measure the vertical period at SCP out (Pin30), that is "TV312.5"/"TV262.5" / "TV313"/"TV263" . D23 V-BLK Start Phase / PH50VBLK / PH60VBLK V-BLK Width / W50VBLK / W60VBLK All:Preset (1)Input a 50Hz/60Hz composite sync signal into Pin38. (2)Measure "T50AFCOFF" / "1T60AFCOFF" at Pin30. (cf. Fig.D25) D24 Sand Castle Pulse Level / VSCPH / VSCPM / VSCPL All:Preset Measure "VSCPH" / "VSCPM" / "VSCPL" at Pin30. V SCPL V SCPM V SCPH D25 Vertical Ramp Amplitude / VVRAMP All:Preset Measure the V Ramp amplitude at Pin24, that is "VVRAMP". D26 Vertical AMP Gain / GVAMP Vertical AMP Max.Output Level / VVOMAX Vertical AMP Min.Output Level / VVOMIN All:Preset (1)Let Pin26 be open. (2)Changing the Pin25 DC voltage, measure "VVOMAX" / "VVOMIN" / "GVAMP" according to a following figure. V VOMAX V VOMIN ƒ¢V=GVAMP =20log(ƒ¢V#26/ƒ¢V#25) #25DC #26DC D27 Vertical AMP Max.Output Current / IVOMAX All:Preset (1)Supply 7V to Pin25. (2)Measure the current from Pin26 to GND, that is "IVOMAX". |
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Similar Description - TB1254N |
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