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參數(shù)資料
| 型號(hào)： | SC4911IMSTR |
| 廠商： | Semtech Corporation |
| 英文描述： | Bias/Primary Side PWM Controller with Ultra Low Start-up Current |
| 中文描述： | 偏置/小學(xué)側(cè)PWM控制器與超低啟動(dòng)電流 |
| 文件頁(yè)數(shù)： | 1/14頁(yè) |
| 文件大小： | 228K |
| 代理商： | SC4911IMSTR |
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www.semtech.com
SC4911
Bias/Primary Side PWM Controller
with Ultra Low Start-up Current
POWER MANAGEMENT
Description
Revision: April 5, 2006
Features
Applications
Telecom isolated converters
Offline isolated power supplies
Instrumentation power supplies
Battery chargers
Typical Application Circuit
Programmable switching frequency up to 500kHz
Line UVLO Protection
Undervoltage Lockout
Low startup current (45μA)
Cycle by cycle current limit
8 pin MSOP. Available in Lead-free, fully WEEE and
RoHS compliant
The SC4911 is a highly integrated bias/primary side PWM
controller designed for off-line or isolated dc-dc convert-
ers in telecommunication and data communication ap-
plications. The high degree of integration minimizes the
amount of discrete parts needed and leads to substan-
tial cost and space saving converter designs.
The circuitry of the SC4911 includes line voltage UVLO
featuring startup current less than 50μA and program-
mable switching frequency. The device supply is derived
from an auxiliary winding on the transformer. The auxil-
iary winding could also provide output feedback informa-
tion if an optocoupler is not used.
Vout
R5
R9
C3
R1
R7
C6
D2
C2
D1
U1 SC4911
1
2
3
4
5
6
7
8
L
R
FB
COMP
ILIM
G
OUT
V
C4
R4
Vin
C7
C1
R8
R2
Q1
R6
T1
C8
R3
C5
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PDF描述 |
|---|---|
| SC4911IMSTRT | Bias/Primary Side PWM Controller with Ultra Low Start-up Current |
| SC50-11EWA | 127mm (5.0INCH) SINGLE DIGIT NUMERIC DISPLAYS |
| SC50-11 | 127mm (5.0INCH) SINGLE DIGIT NUMERIC DISPLAYS |
| SC50-11SGWA | 127mm (5.0INCH) SINGLE DIGIT NUMERIC DISPLAYS |
| SC50-11SRWA | 127mm (5.0INCH) SINGLE DIGIT NUMERIC DISPLAYS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC4911IMSTRT | 制造商:Semtech Corporation 功能描述: |
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| SC493ULTRT | 功能描述:IC REG CTRLR BUCK PWM MLPQ-20 RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:EcoSpeed®, SmartDrive™ 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
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