参数资料
| 型号： | LT3750EMS#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 13/16页 |
| 文件大小： | 0K |
| 描述： | IC CONVERTER 10-MSOP |
| 标准包装： | 50 |
| 类型： | 回扫，正向转换器 |
| 应用： | 电源控制器 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 10-TFSOP，10-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 10-MSOP |
| 包装： | 管件 |
| 产品目录页面： | 1338 (CN2011-ZH PDF) |
| 相关产品： | 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3751 | 制造商:LINER 制造商全称: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 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:50 系列:- 应用:热电冷却器 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.173"，4.40mm 宽）裸露焊盘 供应商设备封装:28-TSSOP 裸露焊盘 包装:管件 产品目录页面: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 类别:集成电路 (IC) >> PMIC - 电源管理 - 专用 系列:- 标准包装:1 系列:- 应用:手持/移动设备 电流 - 电源:- 电源电压:3 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-WFDFN 裸露焊盘 供应商设备封装:14-LLP-EP（4x4） 包装:Digi-Reel® 配用:LP3905SD-30EV-ND - BOARD EVALUATION LP3905SD-30 其它名称:LP3905SD-30DKR |
| LT3751EUFD | 制造商:LINER 制造商全称:Linear Technology 功能描述:Capacitor Charger Controller with Regulation |
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