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SC4905AIMSTR PDF预览

SC4905AIMSTR

更新时间: 2024-01-02 19:31:34
品牌 Logo 应用领域
商升特 - SEMTECH 控制器
页数 文件大小 规格书
24页 365K
描述
High Performance Voltage Mode PWM Controller

SC4905AIMSTR 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:MSOP
包装说明:ROHS COMPLIANT, MSOP-10针数:10
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.22
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING CONTROLLER
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最小输入电压:8.4 V标称输入电压:12 V
JESD-30 代码:S-PDSO-G10JESD-609代码:e3
长度:3 mm湿度敏感等级:1
功能数量:1端子数量:10
最高工作温度:105 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装等效代码:TSSOP10,.19,20封装形状:SQUARE
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
认证状态:Not Qualified座面最大高度:1.1 mm
子类别:Switching Regulator or Controllers表面贴装:YES
切换器配置:SINGLE最大切换频率:1000 kHz
技术:BICMOS温度等级:INDUSTRIAL
端子面层:MATTE TIN端子形式:GULL WING
端子节距:0.5 mm端子位置:DUAL
处于峰值回流温度下的最长时间:NOT SPECIFIED宽度:3 mm
Base Number Matches:1

SC4905AIMSTR 数据手册

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SC4905A/B  
High Performance Voltage Mode  
PWM Controller  
POWER MANAGEMENT  
Description  
Features  
The SC4905A/B is a 10 pin BICMOS primary side voltage  
mode controller for use in Isolated DC-DC and off-line  
switching power supplies. It is a highly integrated solution,  
requiring few external components. The device features a  
high speed oscillator with integrated feed forward  
compensation, accurately programmable maximum duty  
cycle, voltage mode of operation, line voltage monitoring,  
supply UVLO, low start up current, low voltage current limit  
threshold and user accessible reference.  
‹ Operation to 1MHz  
‹ Accurate programmable maximum duty cycle  
‹ Integrated oscillator/voltage feed forward  
compensation  
‹ Line voltage monitoring  
‹ External frequency synchronization  
‹ Bi-phase mode of operation for ripple reduction  
‹ Under 100µA start-up current  
‹ Accessible reference voltage  
‹ VDD undervoltage lockout  
The SC4905A/B device operates at a fixed frequency,  
highly desirable for Telecom applications. Features a  
separate SYNC pin which simplifies synchronization to  
an external clock. Feeding the oscillator of one device to  
the SYNC of another forces biphase operation (180  
degrees apart) which reduces input ripple and filter size.  
‹ -40°C to 105°C operating temperature  
‹ 10-Pin MSOP Lead-free package available.  
Fully WEEE and RoHS compliant  
Applications  
‹ Telecom equipment and power supplies  
‹ Networking power supplies  
‹ Power over LAN applications  
‹ Industrial power supplies  
The SC4905A has a typical turn-on threshold of 4.4V  
and the SC4905B has a typical turn-on threshold of  
about 11.6 volts.  
‹ Isolated power supplies  
These devices are available in the 10 lead MSOP  
package.  
Typical Application Circuit  
Revision: January 4, 2006  
1
www.semtech.com  

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