Application Note 1582 ISL6423B Quick Start Guide 1. Download and install the ISLUSBI2CKIT1Z evaluation board GUI from http://www.intersil.com/products/deviceinfo.asp?p n=ISL6423B. board and the ISL6423BEVAL2Z evaluation board (see Figure 1). 4. Apply 12V to VIN and GND post. 2. Attach one end of the USB cable to the ISLUSBI2CKIT1Z board and the other side goes to the computer. 5. In Windows Explorer go to C:\Program Files\Intersil\LNB Controller Interface and click on the “usb2i2c.exe”. The computer screen should display the program as shown in Figure 2. 3. Attach the 4-pin connector, which came with the evaluation board, between the ISLUSB2I2CEVAL2Z 6. Under Device Select, choose ISL6423/6423B and it should display as shown in Figure 3. FIGURE 1. FIGURE 2. October 27, 2010 AN1582.0 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1582 FIGURE 3. 7. Jumpers JP1, JP2, and JP3 are inserted, whereas JP4 is open, which provides a logic high signal to the SELVTOP pin for controlling the output voltage. Consult the ISL6423, ISL6423B data sheets for additional information. 8. Click on Open Device and the ‘USB Attach’ and ‘USB Device Handle’ buttons in the top left should turn green. 9. To enable the ISL6423, ISL6423B, toggle the EN bit on System Register 4 to ‘1’, at which point the evaluation board should read approximately 13.3V between VLNB and GND post. 2 10.For additional programming features on the ISL6423, ISL6423B evaluation board, please consult the ISL6423, ISL6423B data sheets under I2C register settings. 11.For accurate noise and tone measurement, please insert the scope probe in the SP1 connector on the evaluation board. Figure 4 shows the ISL6423, ISL6423B tone at 500mA of resistive load current from 12VIN when the output voltage is programmed for 13.3V. October 27, 2010 AN1582.0 Application Note 1582 FIGURE 4. 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. For information regarding Intersil Corporation and its products, see www.intersil.com 3 October 27, 2010 AN1582.0 Evaluation Board Schematic VCC5 IN P3 ADDR0 P10 4 SELVTOP P9 R8 R9 100K 100K R10 100K R15 100K OUT JP1 P1 IN SELVTOP OUT TP5 P11 C16 .1UF R6 10K R7 R26 1.62K 10K P2 R5 J1 100 2 1500PF 3 4 1UF JP3 JP4 E 1X4 E R4 R25 1.62K GND SCL GND GND SDA 1 C8 JP2 +5.0/+3.3V VIN C9 ADDR1 EXTM VCC5 100 C10 D5 BZT52C5V6 D6 BZT52C5V6 ADDR1 5 BYPASS 7 Q1 C1 2 56UF 3 E 6 5 4 1 18 SDA 17 E 20 TDIN SCL 16 TDOUT 15 TDIN 14 VO 13 SP1 0.01UF VLNB C13 C15 0.01UF 0.01UF E JP6 L3 E P5 220UH AGND EP CS GATE VSW 25 C7 1UF 15UH EXTM C11 0.1UF 12 PGND L1 P7 CPVOUT 19 21 U1 11 6 P14 C26 ADDR0 4 TDOUT P4 E E ISL6423BERZ 9 VIN TCAP TXT SELVTOP E TP1 SGND 3 10 0.1UF 1 2 22 24 OUT FLT VCC CPSWIN CPSWOUT SGND C12 VIN 8 FLT 23 E P12 R1 VLNB C14 D3 CMS06 D7 0.22UF EE D4 CMS06 1.5KE24CA DNP R14 475 GND TPC6002 P8 R2 C6 0.10 100PF 15 E Q2B TP3 E DNP NDS356AP P6 TP2 SELVTOP Q2A NDS356AP IN R3 2 18.2 R23A 10K 1 E 3 1 R23B DNP TP4 R27 D1 2 3 EE E DNP CMS06 L2 D2 4.7UH S1A C2 C3 C4 C5 56UF 10UF 10UF 10UF TXT 3 R11 P13 October 27, 2010 AN1582.0 EE Q3 1 MMBT2222LT1 4.75K 2 R12 47.5K C27 0.01UF E E EE 10K R24 4.75K 0 E GND Application Note 1582 0.047UF E