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參數(shù)資料
| 型號： | UCC3941-ADJJ |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING REGULATOR, CDIP8 |
| 封裝： | DIP-8 |
| 文件頁數(shù)： | 8/10頁 |
| 文件大?。?/td> | 179K |
| 代理商： | UCC3941-ADJJ |
7
UCC2941-3/-5/-ADJ
UCC3941-3/-5/-ADJ
1.0V input.
Inductor Section
An inductor value of 22
H will work well in most applica-
tions, but values between 10
H and 100H are also ac-
ceptable. Lower value inductors typically offer lower ESR
and smaller physical size. Due to the nature of the
“bang-bang” controllers, larger inductor values will typi-
cally result in larger overall voltage ripple, because once
the output voltage level is satisfied the converter goes
discontinuous, resulting in the residual energy of inductor
causing overshoot.
It is recommended to keep the ESR of the inductor below
0.15
for 500mW applications. A Coilcraft DT3316P-223
surface mount inductor is one choice since it has a cur-
rent rating of 1.5A and an ESR of 84m
. Other choices
for surface mount inductors are shown in Table 1.
Output Capacitor Selection
Once the inductor value is selected the capacitor value
will determine the ripple of the converter. The worst case
peak to peak ripple of a cycle is determined by two com-
ponents, one is due to the charge storage characteristic,
and the other is the ESR of the capacitor. The worst case
ripple occurs when the inductor is operating at maximum
current and is expressed as follows:
()
V
IL
CV
V
IC
CL
OI
CL
ESR
=
+
2
where
ICL = the peak inductor current I
Power Limit
V
CL
IN
=
V = output ripple
VO = output voltage
VI = input voltage
CESR = ESR of the output capacitor
A Sanyo OS-CON series surface mount capacitor
(10SN100M) is one recommendation. This part has an
ESR rating of 90m
at 100F. Other potential capacitor
sources are shown in Table 2.
Input Capacitor Selection
Since the UCC3941 family does not require a large de-
coupling capacitor on the input voltage to operate prop-
erly, a 10
F capacitor is sufficient for most applications.
Optimum efficiency will occur when the capacitor value is
large enough to decouple the source impedance. This
usually occurs for capacitor values in excess of 100
F.
APPLICATION INFORMATION (cont.)
MANUFACTURER
PART NUMBER
Sanyo Video
Components
San Diego, California
OS-CON Series
Tel: 619-661-6322
Fax: 619-661-1055
AVX
Sanford, Maine
TPS Series
Tel: 207-282-5111
Fax: 207-283-1941
Sprague
Concord, New Hampshire
695D Series
Tel: 603-224-1961
Table 2. Capacitor Suppliers
MANUFACTURER
PART NUMBERS
Coilcraft
Cary, Illinois
DT Series
Tel: 708-639-2361
Fax: 708-639-1469
Coiltronics
Boca Raton, Florida
CTX Series
Tel: 407-241-7876
Table 1. Inductor Suppliers
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| UCC3941D-3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| UCC3941D-5 | 制造商:Texas Instruments 功能描述:IC DC/DC CONVERTER 5V 3941 SOIC8 |
| UCC3941D-5G4 | 制造商:Texas Instruments 功能描述:IC DC/DC CONVERTER 5V 3941 SOIC8 |
| UCC3941DTR-3 | 功能描述:IC REG BST SYNC 3.3V 0.2A 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:1,000 系列:- 類型:降壓（降壓） 輸出類型:可調(diào)式 輸出數(shù):1 輸出電壓:0.6 V ~ 4.5 V 輸入電壓:3 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關:3MHz 電流 - 輸出:1.5A 同步整流器:無 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:6-WDFN 裸露焊盤 包裝:帶卷 (TR) 供應商設備封裝:6-LLP-EP（3x3） 產(chǎn)品目錄頁面:1300 (CN2011-ZH PDF) 其它名稱:LM2831ZSDLM2831ZSDTR |
| UCC3941N-3 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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