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TNY253P

更新时间： 2024-02-12 20:35:33
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT /
页数 文件大小 规格书
20页 498K
描述
TinySwitch Family Energy Efficient, Low Power Off-line Switchers

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中文翻译

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TNY253P 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Not Recommended零件包装代码：DIP
包装说明：DIP, DIP8,.3针数：8
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：14 weeks
风险等级：8.35Samacsys Confidence：3
Samacsys Status：ReleasedSamacsys PartID：3256973
Samacsys Pin Count：8Samacsys Part Category：Power Supply
Samacsys Package Category：Dual-In-Line PackagesSamacsys Footprint Name：PDIP-8
Samacsys Released Date：2020-03-31 06:02:24Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATORJESD-30 代码：R-PDIP-T8
JESD-609代码：e3长度：9.59 mm
功能数量：1端子数量：8
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：0.4 A封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP8,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：NOT SPECIFIED认证状态：Not Qualified
座面最大高度：4.45 mm子类别：Power Management Circuits
最大供电电流 (Isup)：0.2 mA表面贴装：NO
切换器配置：SINGLE最大切换频率：48 kHz
温度等级：AUTOMOTIVE端子面层：MATTE TIN
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

TNY253P 数据手册

 浏览型号TNY253P的Datasheet PDF文件第1页浏览型号TNY253P的Datasheet PDF文件第2页浏览型号TNY253P的Datasheet PDF文件第3页浏览型号TNY253P的Datasheet PDF文件第5页浏览型号TNY253P的Datasheet PDF文件第6页浏览型号TNY253P的Datasheet PDF文件第7页 
TNY253/254/255  
V
V
EN  
EN  
CLOCK  
CLOCK  
DC  
DC  
MAX  
MAX  
I
I
DRAIN  
DRAIN  
V
V
DRAIN  
DRAIN  
PI-2259-061298  
PI-2255-061298  
Figure 4. TinySwitch Operation at Heavy Load.  
Figure 5. TinySwitch Operation at Medium Load.  
percentage of cycles will conduct to support the power  
consumption of the power supply.  
inductance and input voltage, the duty cycle is constant.  
However, duty cycle does change inversely with the input  
voltage providing “voltage feed-forward” advantages: good  
line ripple rejection and relatively constant power delivery  
independent of the input voltage.  
The response time of TinySwitch ON/OFF control scheme is  
veryfastcomparedtonormalPWMcontrol. Thisprovideshigh  
line ripple rejection and excellent transient response.  
44 kHz Switching Frequency (TNY253/254)  
Power Up/Down  
Switching frequency (with no cycle skipping) is set at 44kHz.  
This provides several advantages. At higher switching  
frequencies, the capacitive switching losses are a significant  
proportion of the power losses in a power supply. At higher  
frequencies, the preferred snubbing schemes are RCD or diode-  
Zener clamps. However, due to the lower switching frequency  
of TinySwitch , it is possible to use a simple RC snubber (and  
even just a capacitor alone in 115VAC applications at powers  
levels below 4W).  
TinySwitch requires only a 0.1 µF capacitor on the BYPASS  
pin. Because of the small size of this capacitor, the power-up  
delayiskepttoanabsoluteminimum,typically0.3ms(Figure7).  
Due to the fast nature of the ON/OFF feedback, there is no  
overshootatthepowersupplyoutput. Duringpower-down, the  
power MOSFET will switch until the rectified line voltage  
drops to approximately 12 V. The power MOSFET will then  
remain off without any glitches (Figure 8).  
Bias Winding Eliminated  
Secondly, alowswitchingfrequencyalsoreducesEMIfiltering  
requirements. At 44kHz, the first, second and third harmonics  
are all below 150kHz where the EMI limits are not very  
restrictive. For power levels below 4W it is possible to meet  
worldwideEMIrequirementswithonlyresistiveandcapacitive  
filter elements (no inductors or chokes). This significantly  
reduces EMI filter costs.  
TinySwitch does not require a bias winding to provide power to  
the chip. Instead it draws the power directly from the DRAIN  
pin (see Functional Description above). This has two main  
benefits. Firstforanominalapplication,thiseliminatesthecost  
ofanextrabiaswindingandassociatedcomponents. Secondly,  
forchargerapplications,thecurrent-voltagecharacteristicoften  
allows the output voltage to fall to low values while still  
delivering power. This type of application normally requires a  
forward-bias winding which has many more associated  
components, none of which are necessary with TinySwitch.  
Finally, if the application requires stringent noise emissions  
(such as video applications), then the TNY253/254 will allow  
more effective use of diode snubbing (and other secondary  
snubbing techniques). The lower switching frequency allows  
RC snubbers to be used to reduce noise, without significantly  
impacting the efficiency of the supply.  
Current Limit Operation  
Each switching cycle is terminated when the DRAIN current  
reachesthecurrentlimitoftheTinySwitch. Foragivenprimary  
C
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7/01  
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TNY253P 替代型号

型号 品牌 替代类型 描述 数据表
TNY253P POWERINT

当前型号

 TinySwitch Family Energy Efficient, Low Power Off-line Switchers
TNY268PN POWERINT

类似代替

 Enhanced, Energy Efficient, Low Power Off-line Switcher
TNY264PN POWERINT

类似代替

 Enhanced, Energy Efficient, Low Power Off-line Switcher

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