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參數(shù)資料
| 型號(hào)： | L6920DB |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Synchronous rectifier step up converter |
| 中文描述： | 同步整流轉(zhuǎn)換器的步驟 |
| 文件頁數(shù)： | 9/16頁 |
| 文件大?。?/td> | 373K |
| 代理商： | L6920DB |
L6920DB
Detailed description
9/16
Considering that current in the inductor is limited to 800mA, the maximum load current is
defined by the following relationship:
Equation 1
Where
η
is the efficiency and I
LIM
= 750mA
Of course, if I
LOAD
is greater than I
LOAD_LIM
the regulation is lost (
Figure 8
).
Figure 8.
No regulation C2 = V
out
; C3 = Inductor Current
5.2
Start-up
One of the key features of L6920DB is the startup at supply voltage down to 0.8V (please
see the diagram in
Figure 4
).
The device leaves the startup mode of operation as soon as Vout goes over 1.4V. During
startup, the synchronous switch is off and the energy is transferred to the load through its
intrinsic body diode.
The N-channel switches with a very low R
DS(on)
thanks to an internal charge pump used to
bias the power MOS gate. Because of this modified behavior, T
ON
/T
OFF
times are
lengthened. Current limit and zero crossing detection are still available.
I
LOAD_LIM
V
V
out
----------
I
LIM
T
OFF_MIN
V
-------------–
V
in
L
2
–
η
=
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L6920DBTR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 SYNCRONOUS RECT. STEP UP CONVERTER RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| L6920DC | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Sync Rectifier Step Up Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L6920DCTR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 Sync Rectifier Step Up Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L6920DTR | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 0.6 to 5.5V Step-Up RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| L6922-1 | 制造商:Thomas & Betts 功能描述:3/4 CORD GRIP CONNECTOR,EA |
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