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升压6脚芯片FTB628手册

更新时间:2019-08-19 12:22:25 大小:560K 上传用户:yhs598查看TA发布的资源 标签:FTB628 下载积分:2分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

资料介绍

是一款固定频率,电流模式升压变换器,高达1.2MHz的工作频率使得外围电感电容可以选择更小的规格。内置软启动功能减小了启动冲击电流。轻载时自动切换至PFM模式。LY1061包含了输入欠压锁定,电流限制以及过热保护功能。小尺寸的封装给PCB省下更多的空间。 ●  集成0.8欧姆的高压功率MOSFET
● 内部4A的开关电流限制
● 2V-24V的输入电压,VFB:0.6V
●  1.2MHz 固定工作频率
● 输出电流2A   
● 内部补偿功能       
● 输出电压高达28V
● 轻负载条件下,能进行自动脉冲调制。LY1061是一款固定频率,SOT23-6封装的电流模式升压变换器,高达1.2MHz的工作频率使得外围电感电容可以选择更小
●  效率高达97% 
应用:  电池供电设备/ 机顶盒/ LCD偏置电源/ 无线产品及DSL调制调解器/ PCI网卡或插槽供电   DC-DC / AC-DC 电压检测  降压    DC-DC  同步降压  ESD电压保护

部分文件列表

文件名 大小
FTB628.PDF 560K

部分页面预览

(完整内容请下载后查看)
FUXIN  
FTB628  
High Efficiency 1.2MHz 2A Step Up Converter  
FEATURES  
GENERAL DESCRIPTION  
Integrated 80mΩ Power MOSFET  
• 2V to 24V Input Voltage  
The FTB628 is a constant frequency, 6-pin SOT23  
current mode step-up converter intended for small,  
low power applications. The FTB628 switches at  
1.2MHz and allows the use of tiny, low cost  
capacitors and inductors 2mm or less in height.  
Internal soft-start results in small inrush current and  
extends battery life.  
The FTB628 features automatic shifting to pulse  
frequency modulation mode at light loads. The  
FTB628 includes under-voltage lockout, current  
limiting, and thermal overload protection to prevent  
damage in the event of an output overload. The  
FTB628 is available in a small 6-pin SOT-23  
package.  
• 1.2MHz Fixed Switching Frequency  
Internal 4A Switch Current Limit  
Adjustable Output Voltage  
Internal Compensation  
Up to 28V Output Voltage  
Automatic Pulse Frequency Modulation  
Mode at Light Loads  
• up to 97% Efficiency  
Available in a 6-Pin SOT23-6 Package  
APPLICATIONS  
Battery-Powered Equipment  
• Set-Top Boxed  
LCD Bais Supply  
DSL and Cable Modems and Routers  
Networking cards powered from PCI  
or PCI express slots  
TYPICAL APPLICATION  
Efficiency  
Iout (mA)  
Figure 1. Basic Application Circuit  
Figure 2. Efficiency Curve  
1

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