データシートサーチシステム
Selected language   Japanese  ▼

Delete All
ON OFF
ALLDATASHEET.JP

X  

Preview PDF Download HTML

HM8116A データシート(PDF) 9 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

部品番号. HM8116A
部品情報  Standoff 42V 1.2A 800KHz Sync Step-Down Regulator
ダウンロード  13 Pages
Scroll/Zoom Zoom In 100% Zoom Out
メーカー  HMSEMI [Shenzhen Huazhimei Semiconductor Co., Ltd]
ホームページ  http://www.hmsemi.com/
Logo 

HM8116A Datasheet(HTML) 9 Page - Shenzhen Huazhimei Semiconductor Co., Ltd

 
Zoom Inzoom in Zoom Outzoom out
 9 / 13 page
background image
Standoff 42V 1.2A 800KHz Sync Step-Down Regulator
Applications Information
Setting the Output Voltage
require an input capacitor, an output capacitor and an inductor. These components are critical to the
performance of the device.
integrates internal loop compensating resistors, so we do not recommend using
a value of more than 50K for R2. The output voltage can be programmed by resistor divider.
��������������������������������=��������������������������������1+��������2��������2
VOUT(V)
R1(KΩ)
R2(KΩ)
L1(μH)
C1(nF)
CIN(μF)
COUT(μF)
CFF (pF) Opt.
1.0
12.5
50
2.2
100
22
22×2
CFF Chapter
1.05
15.65
50
2.2
100
22
22×2
CFF Chapter
1.2
25.0
50
2.2
100
22
22×2
CFF Chapter
1.5
43.75
50
2.2
100
22
22×2
CFF Chapter
1.8
62.5
50
3.3
100
22
22×2
CFF Chapter
2.5
106.25
50
3.3
100
22
22×2
CFF Chapter
3.3
156.25
50
4.7
100
22
22×2
CFF Chapter
5.0
262.5
50
4.7
100
22
22×2
CFF Chapter
All the external components are the suggested values, the final values are based on the application testing results.
Selecting the Inductor
The recommended inductor values are shown in the Application Diagram. It is important to guarantee the inductor
core does not saturate during any foreseeable operational situation. The inductor should be rated to handle the
maximum inductor peak current: Care should be taken when reviewing the different saturation current ratings that
are specified by different manufacturers. Saturation current ratings are typically specified at 25°C, so ratings at
maximum ambient temperature of the application should be requested from the manufacturer. The inductor value
can be calculated with:
��������=��������������������������������×(������������������������−��������������������������������)
������������������������×∆����������������×��������������������������������
Where ΔIL is the inductor ripple current. Choose inductor ripple current to be approximately 30% to 40% of the
maximum load current. The maximum inductor peak current can be estimated as:
����������������(������������������������)=����������������������������������������+∆����������������2
Under light load conditions below 100mA, larger inductance is recommended for improved efficiency. Larger
inductances lead to smaller ripple currents and voltages, but they also have larger physical dimensions, lower
saturation currents and higher linear impedance. Therefore, the choice of inductance should be compromised
according to the specific application.
HM8116A


Html ページ

1  2  3  4  5  6  7  8  9  10  11  12  13 


Datasheet Download




リンク URL



Privacy Policy
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   ブックマーク
   |   リンク交換   |   メーカーリスト
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn