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TNY277GN PDF预览

TNY277GN

更新时间： 2024-02-14 15:15:38
品牌 Logo 应用领域
帕沃英蒂格盛 - POWERINT 开关光电二极管PC
页数 文件大小 规格书
24页 1604K
描述
Energy Efficient, Off-Line Switcher with Enhanced Flexibility and Extended Power Range

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TNY277GN 技术参数

是否Rohs认证：符合生命周期：Active
零件包装代码：DIP包装说明：DIP, DIP7/8,.3
针数：8Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
Factory Lead Time：14 weeks风险等级：0.87
Samacsys Confidence：4Samacsys Status：Released
Samacsys PartID：532717Samacsys Pin Count：8
Samacsys Part Category：Power SupplySamacsys Package Category：Dual-In-Line Packages
Samacsys Footprint Name：PDIP-8C (P Package)_1Samacsys Released Date：2017-09-02 09:36:16
Is Samacsys：N模拟集成电路 - 其他类型：SWITCHING REGULATOR
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：2.6 V最小输入电压：1.8 V
标称输入电压：2.2 VJESD-30 代码：R-PDIP-T7
JESD-609代码：e3长度：9.575 mm
功能数量：1端子数量：7
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：0.481 A封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP7/8,.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
子类别：Power Management Circuits最大供电电流 (Isup)：0.46 mA
表面贴装：NO切换器配置：SINGLE
最大切换频率：140 kHz温度等级：AUTOMOTIVE
端子面层：Matte Tin (Sn)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 mm
Base Number Matches：1

TNY277GN 数据手册

 浏览型号TNY277GN的Datasheet PDF文件第4页浏览型号TNY277GN的Datasheet PDF文件第5页浏览型号TNY277GN的Datasheet PDF文件第6页浏览型号TNY277GN的Datasheet PDF文件第8页浏览型号TNY277GN的Datasheet PDF文件第9页浏览型号TNY277GN的Datasheet PDF文件第10页 
TNY274-280  
Power Up/Down  
Functional Description above). This has two main benefits.  
First, for a nominal application, this eliminates the cost of a  
bias winding and associated components. Secondly, for battery  
charger applications, the current-voltage characteristic often  
allows the output voltage to fall close to zero volts while still  
delivering power. TinySwitch-III accomplishes this without a  
forward bias winding and its many associated components. For  
applications that require very low no-load power consumption  
(50 mW), a resistor from a bias winding to the BYPASS/  
MULTI-FUNCTION pin can provide the power to the chip.  
The minimum recommended current supplied is 1 mA. The  
BYPASS/MULTI-FUNCTION pin in this case will be clamped  
at 6.4 V. This method will eliminate the power draw from the  
DRAIN pin, thereby reducing the no-load power consumption  
and improving full-load efficiency.  
The TinySwitch-III requires only a 0.1 µF capacitor on the  
BYPASS/MULTI-FUNCTION pin to operate with standard  
current limit. Because of its small size, the time to charge this  
capacitor is kept to an absolute minimum, typically 0.6 ms. The  
time to charge will vary in proportion to the BYPASS/MULTI-  
FUNCTIONpincapacitorvaluewhenselectingdifferentcurrent  
limits. Due to the high bandwidth of the ON/OFF feedback,  
there is no overshoot at the power supply output. When an  
external resistor (4 MΩ) is connected from the positive DC  
input to the EN/UV pin, the power MOSFET switching will  
be delayed during power-up until the DC line voltage exceeds  
the threshold (100 V). Figures 10 and 11 show the power-up  
timing waveform in applications with and without an external  
resistor (4 MΩ) connected to the EN/UV pin.  
Understartupandoverloadconditions,whentheconductiontime  
is less than 400 ns, the device reduces the switching frequency  
to maintain control of the peak drain current.  
Current Limit Operation  
Each switching cycle is terminated when the DRAIN current  
reaches the current limit of the device. Current limit operation  
providesgoodlineripplerejectionandrelativelyconstantpower  
delivery independent of input voltage.  
During power-down, when an external resistor is used, the  
power MOSFET will switch for 64 ms after the output loses  
regulation. The power MOSFET will then remain off without  
any glitches since the under-voltage function prohibits restart  
when the line voltage is low.  
BYPASS/MULTI-FUNCTION Pin Capacitor  
The BYPASS/MULTI-FUNCTION pin can use a ceramic  
capacitor as small as 0.1 µF for decoupling the internal power  
supplyofthedevice.Alargercapacitorsizecanbeusedtoadjust  
the current limit. For TNY275-280, a 1 µF BP/M pin capacitor  
will select a lower current limit equal to the standard current  
limit of the next smaller device and a 10 µF BP/M pin capacitor  
will select a higher current limit equal to the standard current  
limit of the next larger device. The higher current limit level of  
the TNY280 is set to 850 mA typical. The TNY274 MOSFET  
does not have the capability for increased current limit so this  
feature is not available in this device.  
Figure 12 illustrates a typical power-down timing waveform.  
Figure 13 illustrates a very slow power-down timing waveform  
as in standby applications. The external resistor (4 MΩ) is  
connected to the EN/UV pin in this case to prevent unwanted  
restarts.  
No bias winding is needed to provide power to the chip  
because it draws the power directly from the DRAIN pin (see  
E
2/06  
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