 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
AN022 Datasheet(PDF) 4 Page - Analog Intergrations Corporation |
|
||||||||||||||||||||||||||||||
AN022 Datasheet(HTML) 4 Page - Analog Intergrations Corporation |
|
|
4 / 8 page  AN022 4 l Driven N-channel function V1 5V R13 2K Q3 2N2222 R2 2K Q1 2N2222 Q5 2N2907 C5 100 µF R10 2K Vc +10V Q2 2N2222 R1 2K R12 9.1K R3 2K 0V 10V Fig. 7 Fast Driven N-MOSFET Circuit Fig. 8 Driven N-channel Signal Upper: 5V-Driving Signal Lower: 10V-Driving Signal Such as Fig. 7, this driven N-channel function is composed of three NPN transistors, one PNP transistor and six resistors. The configuration of the function block consists of two inverters and one push-pull. The output from the driven circuit, which has an input of 1MHZ, can produce a perfect square signal of 1MHZ. As Fig. 8, the 5V-driving signal will push to 10V-driving signal, which drives N-MOSFET Q4 working properly. 3. AIC1630A for LDO application 1. Input voltage of LDO is provided by the output voltage of buck converter. It can resolve some LDO problems, such as: high dropout voltage and high power consumption. Therefore, the advantage of LDO is to provide a fast transient response, which is what switch converter can not offer. Fig. 4 illustrates that the base current of U5 is controlled by R8 and R9 turns U5 off when LBO floats. Note that, at a light load, R8 and R9 have an effect on efficiency as well as the maximum available output current. And lower R8 and R9 may drive higher output current, but cause AIC1630A N-MOSFET circuit to draw higher level of quiescent current. Component selection The section is divided into two parts. The first part talks about the calculation and selection of the circuit components on buck converter. And the second part introduces an LDO application. All of the following calculations are effective when switch converter is operated in a continuous-conduction mode. (1) Switch converter application The duty cycle is calculated as: F Q ) MIN ( IN F OUT ) MAX ( ON ) MAX ( V V V V V T T DUTY + − + = = Where VF: sckottky diode forward voltage VQ: series pass element (MOSFET) switch on voltage (VQ= IQ× RDS(ON) ) |
Similar Part No. - AN022 |
|
Similar Description - AN022 |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | 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
