ISL6745UEVAL2Z Intersil, ISL6745UEVAL2Z Datasheet
ISL6745UEVAL2Z
Specifications of ISL6745UEVAL2Z
Related parts for ISL6745UEVAL2Z
ISL6745UEVAL2Z Summary of contents
Page 1
... The typical operating current of the high brightness LED is about 300mA~1000mA. The typical drive voltage for high brightness white LED is about 2.5V to 4V. The ISL6745UEVAL2Z evaluation board is a reference design for powering high brightness white LEDs. It utilizes the ISL6745 voltage mode PWM controller in the ...
Page 2
Operation Mechanism and Design Constraints A simplified offline SEPIC converter for LED lighting applications is shown in Figure 3, where the voltage across C is the rectified AC voltage. A current sense resistor is 1 placed in series with the ...
Page 3
TABLE 1. SEPIC CONVERTER (Continued) NAME DESCRIPTION C Feedback Capacitor F I Brightness Dimming Control ADJ CS The MOSFET Current D Output Diode 5 There are three stages of operations: 1. The switch turns on, Diode is off. 2. The ...
Page 4
If we define the ripple factor Krpi = Irp/Il, where Il is the peak of the input current, then the constraint for DCM operation of the converter is as expressed in Equation 15 η ...
Page 5
Waveforms (Continued) VINPUT VINPUT FIGURE 6. INPUT VOLTAGE AND CURRENT, VAC = 240V 300mA O FIGURE 8. OUTPUT VOLTAGE AND RIPPLE Io = 300mA 5 Application Note 1411 FIGURE 7. OUTPUT VOLTAGE AND RIPPLE I FIGURE 9. OUTPUT ...
Page 6
... FIGURE 11. THE GATE SIGNAL AND DRAIN-SOURCE VOLTAGES erformance P of ISL6745UEVAL2Z The schematic of the ISL6745UEVAL2Z evaluation board is shown in page 12. The bill of material (BOM) for universal AC application is shown on page 8. Figure 1 on page 1 shows photographs of the drive board and LED board. The configuration of the test bench is shown in Figure 12. ...
Page 7
Figure 10 is the drain-source voltage of the switch. In Figure 11, the D-S voltages of the MOSFET are shown with the corresponding gate signal at input peak and valley, respectively. Three distinct modes of operation can be observed. 1. ...
Page 8
... Bill of Materials for ISL6745UEVAL2Z MANUFACTURER PART NUMBER Panasonic ECQU2A224ML Murata GRM31BR72J472KW01L Placeholder Murata GRM43QR72J683KW01L Nippon Chem TDK C3216COG2J221J Murata Murata Murata GRM188R71H221KA01D Murata GRM32ER61C476ME15L Murata GRM188R71H331KA01D Murata GRM31CR72A105KA01L Murata GRM188R71H221KA01D Murata GRM188R71H221KA01D Diodes, Inc 1N4007 Diodes, Inc BYG24J OnSemi MMSD4148 LittelFuse ...
Page 9
... Bill of Materials for ISL6745UEVAL2Z MANUFACTURER PART NUMBER DNP Test point, DNP Intersil ISL6745AUZ Intersil EL5220 Diodes, Inc AP432-SR Philips BZX84-C11 LittelFuse TMOV14R260E Bill of Materials for ISL6745LEVAL2Z PART MANUFACTURER NUMBER TBD ISL6745EVAL2ZREVAPCB TDK C3216C0G2J221J-T PANASONIC ECQ-U2A224ML MURATA GRM31BR72J472KW01L MURATA GRM43QR72J683KW01L MURATA H1045-00221-50V10-T ...
Page 10
... VENKEL H2513-00100-1/4W1-T VENKEL H2513-01004-1/4W1-T VENKEL H2513-04992-1/4W1-T VISHAY H2515-00100-1W1-T DALE H2515-00R10-1W1-T VENKEL H2515-01000-1W1-T VENKEL H2515-02551-1W1-T VENKEL H2515-07R15-1W1-T BUSSWIRE-18AWG 3M SJ-5003-BLACK INTERSIL COMMON 8x12-STATIC-BAG STOCK DNP DNP DNP DNP DNP 10 Application Note 1411 (Continued) REFERENCE QTY DESIGNATOR 1 VR1 DIODE-ZENER, SMD, SOT23,10.4V to 11.6V, 5%, 200mA, ROHS 1 ...
Page 11
Bill of Materials for ISL6745LEVAL2Z PART MANUFACTURER NUMBER LABEL-RENAME BOARD LABEL-SERIAL NUMBER LITTLEFUSE INC TMOV14RP140E 11 Application Note 1411 (Continued) REFERENCE QTY DESIGNATOR 1 RENAME PCB TO: LABEL, TO RENAME BRD ISL6745LEVAL2Z. 1 LABEL, FOR SERIAL NUMBER AND BOM REV ...
Page 12
ISL6245UEVAL2Z Schematic FUSE TR5 0. C14 CON2 TP1 TP1 49. R15 49.9k C2 C17 ...
Page 13
ISL6745EVAL2Z Layout 13 Application Note 1411 FIGURE 16. TOP SILKSCREEN FIGURE 17. BOTTOM SILKSCREEN AN1411.3 June 9, 2009 ...
Page 14
... Proceedings of IEEE-IAS Annual Meeting, 1994, pp. 1084–1089. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that the Application Note or Technical Brief is current before proceeding. ...