 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
APW7158 Datasheet(PDF) 19 Page - Anpec Electronics Coropration |
|
|
|||||||||||||||||||||||||||||
APW7158 Datasheet(HTML) 19 Page - Anpec Electronics Coropration |
|
|
19 / 24 page  Copyright © ANPEC Electronics Corp. Rev. A.2 - Aug., 2009 APW7158 www.anpec.com.tw 19 Application Information (Cont.) increased, and continue to regulate up until the MOSFETs is damaged. The resistance of the short should include wiring, PCB traces, contact resistances, and all of the return paths. • The higher duty cycle will give a higher COMP voltage level, and it is easy to touch the trip point. The compensa- tion components also affect the response of COMP voltage; smaller caps may give a faster response. • The output current has faster rising time during short; the COMP pin will have a sharp rise. However, if the cur- rent rises too fast, it may cause a false trip. The output capacitance and its ESR can affect the rising time of the current during short. Short Circuit Protection (Cont.) Layout Consideration In high power switching regulator, a correct layout is im- portant to ensure proper operation of the regulator. In general, interconnecting impedances should be mini- mized by using short, wide printed circuit traces. Signal and power grounds are to be kept separate and finally combined using ground plane construction or single point grounding. Figure 10 illustrates the layout, with bold lines indicating high current paths; these traces must be short and wide. Components along the bold lines should be placed lose together. Below is a check- list for your layout : • The metal plate of the bottom of the packages (SOP- 20) must be soldered to the PCB and connected to the GND plane on the backside through several thermal vias. • Keep the switching nodes (UGATE, LGATE and PHASE) away from sensitive small signal nodes since these nodes are fast moving signals. Therefore, keep traces to these nodes as short as possible. • The traces from the gate drivers to the MOSFETs (UGATE1, LGATE1, UGATE2, LGATE2) should be short and wide. • Decoupling capacitor, compensation component, the resistor dividers, boot capacitors, and SS capacitors should be close their pins. • The input capacitor should be near the drain of the upper MOSFET; the output capacitor should be near the loads. The input capacitor GND should be close to the output capacitor GND and the lower MOSFET GND. • The drain of the MOSFETs (VIN and phase nodes) should be a large plane for heat sinking. Figure 10. Layout Guidelines V IN V OUT Q1 L1 C IN APW7158 L O A D BOOT VCC12 SS FB GND C SS C VCC C BOOT Q2 C OUT VCC LG UG PGND C VCC12 VREF C VREF REFOUT C REFOUT |
Similar Part No. - APW7158 |
|
Similar Description - APW7158 |
|
|
|
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
