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參數(shù)資料
| 型號： | LT3750EMS#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CONVERTER 10-MSOP |
| 標(biāo)準(zhǔn)包裝： | 50 |
| 類型： | 回掃，正向轉(zhuǎn)換器 |
| 應(yīng)用： | 電源控制器 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 10-TFSOP，10-MSOP（0.118"，3.00mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 10-MSOP |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1338 (CN2011-ZH PDF) |
| 相關(guān)產(chǎn)品： | 732-2128-6-ND - TRANS POWR FOR LT3751/LT3750 SMD 732-2128-1-ND - TRANS POWR FOR LT3751/LT3750 SMD 732-2128-2-ND - TRANS POWR FOR LT3751/LT3750 SMD |
6
LT3750
3750fa
OPERATIO
U
The LT3750 is designed to charge capacitors quickly and
efficiently. Operation can be best understood by referring
to Figures 1 and 2. Operation proceeds in four phases:
1. Start-up, 2. Primary-side charging, 3. Secondary en-
ergy transfer, 4. Discontinuous mode sensing.
1. Start-Up
Start-up occurs for approximately 20
s after the charge
pin is raised high. During this phase, a one-shot enables
the master latch and turns on the NMOS. The master latch
will remain in the set state until the target output voltage
is reached or a fault condition resets it.
2. Primary Side Charging
When the NMOS on latch is set, the gate driver rapidly
charges the gate pin to VCC – 2V. The external NMOS turns
on forcing VTRANS – VDS(ON) across the primary winding.
Consequently, current in the primary coil rises linearly at
ILPRI
ILSEC
S2
VTRANS
VPRI
VSEC
3750 F01a
S1
+
–
+
–
+
–
1:N
VDRAIN
(1a) Equivalent Circuit During Primary-Side Charging
ILPRI
ILSEC
S2
1:N
VTRANS
VPRI
VSEC
3750 F01b
S1
+
–
+
–
+
–
VDRAIN
(1b) Equivalent Circuit During Secondary Energy
Transfer and Output Detection
ILPRI
ILSEC
S2
1:N
VTRANS
VPRI
VSEC
3750 F01c
S1
+
–
+
–
+
–
VDRAIN
(1c) Equivalent Circuit During Discontinuous Mode Detection
Figure 1. Equivalent Circuits
VTRANS – VDS(ON)
LPRI
VTRANS – VDS(ON)
–N (VTRANS – VDS(ON))
VOUT + VDIODE
LSEC
IPK
N
–(VOUT + VDIODE)
N
ILPRI
ILSEC
VPRI
VSEC
VDRAIN
VOUT + VDIODE
N
VTRANS +
VTRANS
VDS(ON)
3750 F02
VDS(ON)
1.
PRIMARY-SIDE
CHARGING
2.
SECONDARY
ENERGY TRANSFER
AND OUTPUT
DETECTION
3.
DISCONTINUOUS
MODE
DETECTION
Figure 2. Idealized Charging Waveforms
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT3751 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Capacitor Charger Controller with Regulation |
| LT3751EFE#PBF | 功能描述:IC CTRLR CAP CHRGR 20-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:50 系列:- 應(yīng)用:熱電冷卻器 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.173"，4.40mm 寬）裸露焊盤 供應(yīng)商設(shè)備封裝:28-TSSOP 裸露焊盤 包裝:管件 產(chǎn)品目錄頁面:1410 (CN2011-ZH PDF) |
| LT3751EFE#PBF | 制造商:Linear Technology 功能描述:; Leaded Process Compatible:Yes; Peak Re |
| LT3751EFE#TRPBF | 功能描述:IC CTRLR CAP CHARGER 20-TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 電源管理 - 專用 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 應(yīng)用:手持/移動設(shè)備 電流 - 電源:- 電源電壓:3 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:14-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:14-LLP-EP（4x4） 包裝:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名稱:LP3905SD-30DKR |
| LT3751EUFD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Capacitor Charger Controller with Regulation |
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