 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
APW7101-BI-TRG Datasheet(PDF) 10 Page - Anpec Electronics Coropration |
|
||||||||||||||||||||||||||||||
APW7101-BI-TRG Datasheet(HTML) 10 Page - Anpec Electronics Coropration |
|
|
10 / 16 page  Copyright © ANPEC Electronics Corp. Rev. A.4 - Jun., 2008 APW7101 www.anpec.com.tw 10 Application Information Inductor Selection where f S is the switching frequency of APW 7101 and ∆IL is the value of the worst current ripple, it can be any value of current ripple that smaller than the worst value you can accept. In order to perform high efficiency, selecting a low DC resistance inductor is a helpful way. Another impor- tant parameter is the DC current rating of the inductor. The minimum value of DC current rating equals the full load value of 600mA, plus the half of the worst current ripple, 120mA. Choose inductors with suitable DC current rating to ensure the inductors don’t operate in the saturation. ( ) ) 1 ......( f I 1 V V V V L S L IN OUT OUT IN ⋅ ∆ ⋅ ⋅ − = Figure-1 shows a schematic of a Buck structure. The waveforms is shown as Figure-2. Input Capacitor Selection The input capacitor must be able to support the maxi- mum input operating voltage and maximum RMS input current. The Buck converter absorbs current from input in pulses. Due to the high switching frequency as 1.5MHz, the in- ductor value of the application field of APW7101 is usually from 1 µH to 4.7µH. The criterion to select a suitable in- ductor is dependent on the worst current ripple through- out the inductor. The worst current ripple defines as 40% of the fully load capability. In the APW7101 applications, the worst value of current ripple is 240mA, the 40% of 600mA. Evaluate L by equation (1): Figure-1 Figure-2 I IN I OUT I L I IN I(C IN) I(C OUT) I OUT I(Q 1) PWM D*T S (1-D)*T S 0A 0A 0A 0A 0A Observe the waveform of I(C IN),the RMS value of I(CIN) is ( ) ( ) [ ] ( ) ) 2 ......( D 1 I D I I C I 2 IN 2 2 IN OUT IN − ⋅ + ⋅ − = Replace D and I IN by following relation: ) 3 ......( V V D IN OUT = ) 4 ......( I D I OUT IN ⋅ = The RMS value of input capacitor current equal: ( ) ) 5 ......( ) D 1 ( D I C I OUT IN − ⋅ = When D=0.5 the RMS current of input capacitor will be maximum value. Use this value to choose the input capacitor with suitable current rating. |
Similar Part No. - APW7101-BI-TRG |
|
Similar Description - APW7101-BI-TRG |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| 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 Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
