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UCC3941-ADJD PDF预览

UCC3941-ADJD

更新时间： 2024-11-20 14:45:23
品牌 Logo 应用领域
德州仪器 - TI 信息通信管理开关光电二极管
页数 文件大小 规格书
3页 81K
描述
SWITCHING REGULATOR, PDSO8, SOIC-8

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中文翻译

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UCC3941-ADJD 技术参数

生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP,针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.69
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
最大输入电压：3 V最小输入电压：1 V
标称输入电压：1.25 VJESD-30 代码：R-PDSO-G8
功能数量：1端子数量：8
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
认证状态：Not Qualified表面贴装：YES
切换器配置：BOOST技术：BICMOS
温度等级：COMMERCIAL端子形式：GULL WING
端子位置：DUALBase Number Matches：1

UCC3941-ADJD 数据手册

 浏览型号UCC3941-ADJD的Datasheet PDF文件第2页浏览型号UCC3941-ADJD的Datasheet PDF文件第3页 
DN-73  
Design Note  
UCC3941 One Volt Boost Converter  
Demonstration Kit - Schematic and List  
of Materials  
The UCC3941-3/-5/-ADJ Demonstration Kit allows  
the designer to evaluate the performance of the  
UCC3941-3/-5/-ADJ One Volt Boost Converter in a  
typical application circuit. Figure 1 shows a sche-  
matic for the UCC3941-3/-5/-ADJ Demonstration  
Kit. The UCC3941control chip is available in three  
output voltage configurations (VOUT = 3.3V, 5V, or  
adjustable). The kit can be populated to evaluate  
any of these three versions.  
are printed on the circuit board next to the associ-  
ated components.  
Alternate components can be substituted, however  
a few words of caution are in order.  
High quality low ESL, low ESR, capacitors should  
be used in order to keep the output ripple voltage  
low and minimize noise that could effect circuit per-  
formance. Sprauge 594D/595D series, AVX TPS  
series, or Sanyo OS-CON series are good choices.  
For the fixed output voltages, R1 is not populated  
and R2 is a 0Ω jumper, connecting pin 6 to ground.  
With the adjustable version, pin 6 is connected to  
A 22µH inductor is recommended for most applica-  
tions. An inductor value of less than 10µH should  
Note: Part values for 3.3V or 5V versions.  
UDG-97112  
Figure 1. Demonstration Kit Schematic  
the inverting input of a comparator whose non-in-  
verting input is internally connected to 1.25V. R1  
and R2 are used to program the output voltage,  
where  
not be used since the rise and fall times will begin  
to approach internal timing limits of the IC. Larger  
values of inductors will typically result in larger rip-  
ple voltages on the outputs, due to the residual  
energy stored in the inductor. (Note: Data Sheet  
equations for the power limit and peak current as-  
sume a 22µH inductor). Inductors exist as standard  
part numbers from vendors such as Coilcraft, Coil-  
tronics and Sumida.  
R1  
VOUT = 1.25 • 1 +  
R2  
SD needs to be grounded, or set to a logic level low,  
in order for the chip to operate. If SD is floating, or  
set to a logic level high, the UCC3941 enters a low  
power shutdown state. R3 sets the power limit of  
the device (see the UCC3941-3/-5/-ADJ Data  
Sheet). A value of 6.2Ω will limit the output power to  
500mW.  
A zener diode is used for D1 in order to guarantee  
that VGD does not rise above 10V during unloaded  
conditions.  
For further information, contact a local Unitrode  
Representative or Field Applications Engineer at  
(603) 424-2410.  
Table 1 contains a parts list for the demonstration  
kit (fixed output versions). Reference designators  
3/97  
123

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