SERO DC AWA-SS-15 Manual de usuario

11/04/081PD-60356IR3802MPBFHIGHLY INTEGRATED 4AWIDE-INPUT VOLTAGE, SYNCHRONOUS BUCK REGULATORFeatures• Wide Input Voltage Range 2.5V to 21V• Wide Ou

11/04/0810PD-60356IR3802MPBFOver-Current ProtectionThe over-current protection is performed by sensing current through the RDS(on)of the low side MO

11/04/0811PD-60356IR3802MPBFApplication InformationDesign Example:The following example is a typical application for the IR3802. The application cir

11/04/0812PD-60356IR3802MPBFInput Capacitor SelectionThe input filter capacitor should be selected based on how much ripple the supply can tolerate

11/04/0813PD-60356IR3802MPBFFeedback CompensationThe IR3802 is a voltage mode controller; the control loop is a single voltage feedback path includi

11/04/0814PD-60356IR3802MPBFTo cancel one of the LC filter poles, place the zero before the LC filter resonant frequency pole:Use equations (15) and

11/04/0815PD-60356IR3802MPBFBased on the frequency of the zero generated by the output capacitor and its ESR versus crossover frequency, the compens

11/04/0816PD-60356IR3802MPBFProgramming the Current-LimitThe Current-Limit threshold can be set by connecting a resistor (RSET) from drain of the lo

11/04/0817PD-60356IR3802MPBFTypical Application for IR380212V to 1.8V @ 4AFig.16: Typical Application circuit for 12V to 1.8V at 4A using ceramic ou

11/04/0818PD-60356IR3802MPBFPCB Metal and Components PlacementThe lead lands (the 11 IC pins) width should be equal to the nominal part lead width.

11/04/0819PD-60356IR3802MPBFSolder ResistIt is recommended that the lead lands are Non Solder Mask Defined (NSMD). The solder resist should be pulle

11/04/082PD-60356IR3802MPBFPACKAGE INFORMATION5mm x 6mm POWER QFNFig. 2: Package outline (Top view)W/C2θW/C35θoPCBJoJA==-400015IR3802MTRPBFM750PARTS

11/04/0820PD-60356IR3802MPBFStencil Design• The Stencil apertures for the lead lands should be approximately 80% of the area of the lead lads. Reduc

11/04/0821PD-60356IR3802MPBFIR WORLD HEADQUARTERS: 233 Kansas St., El Segundo, California 90245, USA Tel: (310) 252-7105TAC Fax: (310) 252-7903This

11/04/083PD-60356IR3802MPBFBlock DiagramFig. 3. Simplified block diagram of the IR3802.

11/04/084PD-60356IR3802MPBFPin DescriptionPins 4, 5 and 15 need to be connected together on system board. Pin Name Description 1 NC No Connect 2 F

11/04/085PD-60356IR3802MPBFRecommended Operating ConditionsParameter Symbol Test Condition Min TYP MAX Units Power Loss Power Loss Ploss Vcc=Vin=1

11/04/086PD-60356IR3802MPBFNote1: Continuous output current determined by input and output voltage setting and the thermal environment.Note2: Cold t

11/04/087PD-60356IR3802MPBFTYPICAL OPERATING CHARACTERISTICS (-40oC - 125oC)Icc(static)7.08.09.010.011.012.013.0-40 -20 0 20 40 60 80 100 120Temp[oC

11/04/088PD-60356IR3802MPBFCircuit DescriptionTHEORY OF OPERATIONThe IR3802 is a voltage mode PWM synchronous regulator and operates with a fixed 60

11/04/089PD-60356IR3802MPBFSoft-StartThe IR3802 has programmable soft-start to control the output voltage rise and limit the inrush current during s