Electronic Components Datasheet Search |
|
DCP022415DU Datasheet(PDF) 6 Page - Texas Instruments |
|
|
DCP022415DU Datasheet(HTML) 6 Page - Texas Instruments |
6 / 17 page www.ti.com FUNCTIONAL DESCRIPTION OVERVIEW POWER STAGE OSCILLATOR AND WATCHDOG THERMAL SHUTDOWN CONSTRUCTION SYNCHRONIZATION DCP 02 V OUT1 V SUPPLY V S 0V V +V OUT1 OUT2 SYNC 0V COM DCP 02 V OUT2 V S 0V SYNC 0V C requiresalow-ESRceramiccapacitor:5Vto15Vversionis2.2 F; 24Vversionisminimum0.47 F. m IN m NOTE:(1) C IN (1) C OUT 1.0 F m C IN (1) C OUT 1.0 F m DCP02 Series SBVS011K – MARCH 2000 – REVISED FEBRUARY 2008 This interference occurs because of the small variations in switching frequencies between the The DCP02 offers up to 2W of unregulated output DC/DC converters. power from a 5V, 12V, 15V, or 24V input source with a typical efficiency of up to 89%. This efficiency is The DCP02 overcomes this interference by allowing achieved through highly integrated packaging devices to be synchronized to one another. Up to technology and the implementation of a custom eight devices can be synchronized by connecting the power stage and control IC. The circuit design uses SYNC pins together, taking care to minimize the an advanced BiCMOS/DMOS process. capacitance of tracking. Stray capacitance (> 10pF) has the effect of reducing the switching frequency, or even stopping the oscillator circuit. It is also recommended that power and ground lines be The DCP02 uses a push-pull, center-tapped topology star-connected. switching at 400kHz (divide-by-2 from an 800kHz It should be noted that if synchronized devices are oscillator). used at start up, all devices will draw maximum current simultaneously. This configuration can cause the input voltage to dip; if it dips below the minimum The onboard 800kHz oscillator generates the input voltage (4.5V), the devices may not start up. A switching frequency via a divide-by-2 circuit. The 2.2 µF capacitor should be connected close to the oscillator can be synchronized to other DCP02 input pins. circuits or an external source, and is used to minimize If more than eight devices are to be synchronized, it system noise. is recommended that the SYNC pins be driven by an A watchdog circuit checks the operation of the external device. Details are contained in Application oscillator circuit. The oscillator can be stopped by Report SBAA035, External Synchronization of the pulling the SYNC pin low. The output pins will be DCP01/02 Series of DC/DC Converters, available for tri-stated, which occurs in 2 µs. download from www.ti.com. The DCP02 is protected by a thermal-shutdown The basic construction of the DCP02 is the same as circuit. If the on-chip temperature exceeds +150 °C, standard ICs; there is no substrate within the molded the device will shut down. Once the temperature falls package. The DCP02 is constructed using an IC, below +150 °C, normal operation resumes. rectifier diodes, and a wound magnetic toroid on a leadframe. Since there is no solder within the package, the DCP02 does not require any special printed circuit board (PCB) assembly processing. This In the event that more than one DC/DC converter is architecture results in an isolated DC/DC converter needed onboard, beat frequencies and other with inherently high reliability. electrical interference can be generated. Figure 7. Connecting the DCP02 in Series 6 Submit Documentation Feedback Copyright © 2000–2008, Texas Instruments Incorporated Product Folder Link(s): DCP02 Series |
Similar Part No. - DCP022415DU |
|
Similar Description - DCP022415DU |
|
|
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 |