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參數(shù)資料
| 型號： | LTC4269IDKD-2#TR |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO32 |
| 封裝： | 7 X 4 MM, PLASTIC, M0-229, DFN-32 |
| 文件頁數(shù)： | 24/34頁 |
| 文件大?。?/td> | 383K |
| 代理商： | LTC4269IDKD-2#TR |
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LTC4269-2
0
42692fb
applicaTions inForMaTion
Example (3) Time For Maximum Duty Cycle Clamp to
Reach Within X% of Target Value
Amaximumdutycycleclampof72%wascalculatedprevi-
ously in the section ‘Programming Maximum Duty Cycle
Clamp’. The programmed value used for SS_MAXDC(DC)
was 1.84V.
ThetimeforSS_MAXDCtochargefromitsminimumvalue
VSS(MIN) to within X% of SS_MAXDC(DC) is given by:
t(SS_MAXDC charge time within X% of target)
= t[(1 – (X/100) SS_MAXDC(DC)] – t(VSS(MIN))
For X = 2 and VSS(MIN) = 0.45V, t(0.98 1.84) – t(0.45)
= t(1.803) – t(0.45)
From previous calculations, t(0.45) = 7.3e–4s.
Using previous values for RT, RB and CSS,
t(1.803) = 2.63e–4 1e–7 (–1) ln(1 – 1.803/1.84)
= 2.63e–3 (–1) ln(0.02) = 1.03e–2 s
Hence the time for SS_MAXDC to charge from its mini-
mum reset threshold of 0.45V to within 2% of its target
value is given by:
t(1.803) – t(0.45) = 1.03e–2 – 7.3e–4 = 9.57e–3s
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| LTC4270AIUKG#PBF | 制造商:Linear Technology 功能描述:POE Controller 90W 52-Pin QFN EP 制造商:Linear Technology 功能描述:Bulk 制造商:Linear Technology 功能描述:IC POE LTPOE 12-PORT PSE 52-QFN 制造商:Linear Technology 功能描述:PSE CNTRL 12 PORT 90W 1MHZ 制造商:Linear Technology 功能描述:IC PSE CONTROLLER 3.3V QFN-52 制造商:Linear Technology 功能描述:IC, PSE CONTROLLER, 3.3V, QFN-52; Input Voltage:3.3V; Supply Current:10mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:52; Frequency:1MHz; Operating Temperature Min:-40C; Operating Temperature Max:85C; Package / Case:52-QFN ;RoHS Compliant: Yes |
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