ISL62391, ISL62392 Triple-Output Evaluation Board User Guide (R) Application Note Introduction . The ISL62391 and ISL62392 evaluation boards demonstrate the performance of ISL62391 and ISL62392 triple-output controllers. The ISL62391 and ISL62392 controllers include two pulse-width modulation (PWM) controllers featured with Intersil's patented R3 technology, output adjustable from 0.6V to 5.5V, and a linear regulator (LDO3) that generates a fixed 3.3V output and can deliver up to 100mA. The evaluation board includes two Enable switches, an LED Power-Good indicator and various test points. Each switching channel has an on-board dynamic load generator for evaluating the transient-load response. There are four different evaluation boards which provide flexible evaluation options. Table 1 shows a brief description of the evaluation boards. TABLE 1. EVALUATION BOARD DESCRIPTION EVALUATION BOARD July 31, 2008 CHANNEL-1 CHANNEL-2 OCP ISL62391LOEVAL1Z 3.3V/8A 5V/8A ~10A ISL62391HIEVAL1Z 1.05V/15A 1.5V/15A ~20A ISL62392LOEVAL1Z 3.3V/8A 5V/8A ~10A ISL62392HIEVAL1Z 1.05V/15A 1.5V/15A ~20A AN1397.0 TABLE 2. ENABLE TRUTH TABLE EN1 EN2 START-UP SEQUENCE Low Low Low Float Both Channel outputs OFF simultaneously Float Low Float Float Both Channel outputs OFF simultaneously Low High Channel-1 OFF, Channel-2 ON High Low Channel-1 ON, Channel-2 OFF High High Both Channel outputs ON simultaneously Float High Channel-1 enabled after Channel-2 is in regulation High Float Channel-2 enabled after Channel-1 is in regulation Both Channel outputs OFF simultaneously Both Channel outputs OFF simultaneously Resistor Current Sense Configuration The evaluation board is pre-configured with inductor DCR current sense. For more precise overcurrent protection, it also provides the option of resistor current sense. Figure 1 shows the configuration for resistor current sense. L PHASEx The Evaluation Board Kit contains the following materials: IL VO _ + VRSENSE ISL62391 ISL62392 What's Inside RSENSE CO 10A OCSETx ROCSET _ + VROCSET * ISL6239xxxEVAL1Z Evaluation Board RO ISENx * ISL62391, ISL62392 Datasheet * ISL62391, ISL62392 Evaluation Board User Guide (this document) What's Needed The following materials will be needed in order to perform testing: * Adjustable +25V, 30A Power Supply * +12V, 100mA Power Supply FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT For Channel-1, the ISL62391 and ISL62392 monitor the OCSET1 pin and the ISEN1 pin voltages. Once the OCSET1 pin voltage is higher than the ISEN1 pin voltage for more than 10s, the ISL62391 and ISL62392 declare an overcurrent fault. For a chosen overcurrent set point IOC and current sense resistor RSENSE, the value of ROCSET is determined by Equation 1: I OC * R SENSE R OCSET = ------------------------------------10A * Precision Digital Multimeter (EQ. 1) * 3 Electronic Loads Where: * 4-Channel Oscilloscope Enable Control The evaluation board provides flexible control logic to enable or disable the outputs, and to program the two PWM channels' start-up sequence. For start-up timing sequence, please refer to the ISL62391, ISL62392 datasheet waveforms. Table 2 is the Enable controller truth table. 1 - ROCSET () is the resistor used to program the overcurrent setpoint - IOC is the output current threshold that will activate the OCP circuit - RSENSE is current sense resistor (R3 for Channel-1 and R25 for Channel-2) 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. 2008. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1397 Take Channel-1 as an example, once the value of ROCSET is calculated, follow the following procedure to configure the resistor current sense circuit: Step 1: Open the "DCR SENSE" solder bridge and connect the "RESISTOR SENSE" solder bridge on the PCB bottom layer; Step 2: Remove R7 (R22 for Channel-2); Step 3: Replace R3 (R25 for Channel-2) with RSENSE; Step 4: Replace C6 (C25 for Channel-2) with ROCSET; Step 5: Replace replace R19 (R18 for Channel-2) with ROCSET. Connections and Test Points NUMBER Dynamic Load Generator The evaluation board provides each PWM channel an on-board dynamic load generator for evaluating the transient-load response, which are controlled by SW1 and SW2 respectively. The dynamic load generator applies a 300s pulse load across VOUT and GND. The transient load slew-rate can be trimmed by adjusting the resistors R28, R34 for the rising edge, and R29, R35 for the falling edge. A +12V power supply is needed to power the dynamic load generator. The following table describes the function and operation of the evaluation boards. NAME FUNCTION/OPERATION INTERFACES AND CONNECTIONS VBAT VIN positive power input TP4 GND VIN return power input TP1 VOUT1 TP3 TP2 GND TP11 VOUT2 Channel-1 positive power output Channel-1 return power output Channel-2 positive power output TP12 GND Channel-2 return power output TP14 +12V +12V positive power input, used for the power supply of the on-board dynamic-load generator TP15 GND +12V return power input TEST POINTS J3 PHASE1 Scope-probe socket for measuring Channel-1 phase node J6 PHASE2 Scope-probe socket for measuring Channel-2 phase node J2 VOUT1 Scope-probe socket for measuring Channel-1 output J5 VOUT2 Scope-probe socket for measuring Channel-2 output J4 FLOAT_FCCM J7 FLOAT_EN1 J1 FLOAT_EN2 TP13 EN1 TP8 EN2 TP9 LDO3EN TP10 FCCM Remove the jumper will float the FCCM pin Remove the jumper will float the EN1 pin Remove the jumper will float the EN2 pin Test point of EN1 pin Test point of EN2 pin Test point of LDO3EN pin Test point of FCCM pin POWER-GOOD INDICATOR TP5 PGOOD D1 Test point of PGOOD pin Power-Good indicator. Green when VOUT1 and VOUT2 are both in regulation. LINEAR REGULATOR TP6 LDO3 LDO3 linear regulator positive power output TP7 GND LDO3 linear regulator return power output SWITCHES SW1 ON/OFF control of channel-2 dynamic-load generator. Toggle to ON will enable the dynamic load, toggle to OFF will disable the transient load SW2 ON/OFF control of channel-1 dynamic-load generator. Toggle to ON will enable the dynamic load, toggle OFF will disable the transient load U2 ON: High level for EN1, EN2, LDO3EN and FCCM, respectively OFF: Low level for EN1, EN2, LDO3EN and FCCM, respectively 2 AN1397.0 July 31, 2008 Application Note 1397 Test Set-up Figure 2 shows a typical test configuration. VOUT2 (0.6V~5.5V) + - + LDO3 (3.3V) + VIN (5.5V~25V) - PROBE + 12V - + VOUT1 (0.6V~5.5V) FIGURE 2. TYPICAL TEST CONFIGURATION 3 AN1397.0 July 31, 2008 Application Note 1397 ISL62391LOEVAL1Z, ISL62392LOEVAL1Z Evaluation Board Bill of Materials ISL62391LOEVAL1Z and ISL62392LOEVAL1Z evaluation boards use the same PCB and schematic, thus the same bill of materials except for the controller U1. NO REFERENCE DESIGNATOR QTY 1 C6, C25 2 0.022F 25V 10 GENERIC SM_CAP_0603, 0.022F, 25V, 10%, X7R, ROHS 2 C8, C9 2 0.01F 16V 10 GENERIC SM_CAP_0603, 0.01F, 16V, 10%, X7R, ROHS 3 C17, C19 2 0.22F 16V 10 GENERIC SM_CAP_0603, 0.22F, 16V, 10%, X7R, ROHS 4 C13, C15, C22, C23 4 10F 25V 10 GENERIC SM_CAP_1206, 10F, 25V, 10%, X7R, ROHS 5 C12, C14 2 1200pF 16V 10 GENERIC SM_CAP_0603, 1200PF, 16V, 10%, X7R, ROHS 6 C7, C21 2 1F 10V 10 GENERIC SM_CAP_0603, 1F, 10V, 10%, X7R, ROHS 7 C11, C24 2 1F 25V 10 GENERIC SM_CAP_1206, 1F, 25V, 10%, X7R, ROHS 8 C1, C2, C10, C28 4 4.7F 10V 10 GENERIC SM_CAP_0805, 4.7F, 10V, 10%, X7R, ROHS 9 C20 1 4.7F 10V 10 GENERIC SM_CAP_1206, 4.7F, 10V, 10%, X7R, ROHS 10 C16, C18, C29, C30 4 10F 16V 10 GENERIC SM_CAP_0805, 10F, 16V, 10%, X5R, ROHS 11 C3 1 56F 25V 20 SANYO-OSCON RADIAL_POLCAP_RADIAL, 25SP56M, 56F, 25V, 20%, CASE-CC 12 C4, C26 2 330F 6.3V 10 SANYO-POSCAP SM_POLCAP_SMD, 6TPF330M9L, 330F, 6.3V, 10%, CAP_7343 13 R12, R15 2 750 1/10W 1 GENERIC SM_RES_0603, 750, 1/10W, 1%, TF, ROHS 14 R11 1 10k 1/10W 1 GENERIC SM_RES_0603, 10k, 1/10W, 1%, TF, ROHS 15 R14 1 9.09k 1/10W 1 GENERIC SM_RES_0603, 9.09k, 1/10W, 1%, TF, ROHS 16 R13 1 68.1k 1/10W 1 GENERIC SM_RES_0603, 68.1k, 1/10W, 1%, TF, ROHS 17 R7, R18, R19, R22 4 15.8k 1/10W 1 GENERIC SM_RES_0603, 15.8k, 1/10W, 1%, TF, ROHS 18 R8 1 19.6k 1/10W 1 GENERIC SM_RES_0603, 19.6k, 1/10W, 1%, TF, ROHS 19 R9 1 24.3k 1/10W 1 GENERIC SM_RES_0603, 24.3k, 1/10W, 1%, TF, ROHS 20 R16 1 45.3k 1/10W 1 GENERIC SM_RES_0603, 45.3k, 1/10W, 1%, TF, ROHS 21 R27, R29, R33 3 1k 1/10W 1 GENERIC SM_RES_0603, 1k, 1/10W, 1%, TF, ROHS 22 R35 1 1.58k 1/10W 1 GENERIC SM_RES_0603, 1.58k, 1/10W, 1%, TF, ROHS 23 R26, R32 2 48.7k 1/10W 1 GENERIC SM_RES_0603, 48.7k, 1/10W, 1%, TF, ROHS 24 R1, R2 2 0 1/10W 1 GENERIC SM_RES_0603, 0, 1/10W, 1%, TF, ROHS 25 R28, R34 2 200 1/10W 1 GENERIC SM_RES_0603, 200, 1/10W, 1%, TF, ROHS 26 R5 1 499 1/10W 1 GENERIC SM_RES_0603, 499, 1/10W, 1%, TF, ROHS 27 R6, R10, R21, R23, R24 5 100k 1/10W 1 GENERIC SM_RES_0603, 100k, 1/10W, 1%, TF, ROHS 28 R30 1 0.7 1W 1 GENERIC SM_RES_2512, 0.7, 1W, 1%, TF, ROHS 29 R37 1 0.5 1W 1 GENERIC SM_RES_2512, 0.5, 1W, 1%, TF, ROHS 30 D1 1 SSL_LXA3025IGC LUMEX SSL_LXA3025IGC_SMD-SSLLXA3025IGC,LED_3X2_5MM 31 D2, D3 2 BAT54S DIODES SM_SCHOTTKY_BAT54S-BAT54S, SOT23 32 Q2, Q4 2 IRF7821PBF IR 30V 13.6A N-Channel HEXFET Power MOSFET (Pb-free) 33 Q3, Q5 2 IRF7832PBF IR 30V 20A N-Channel HEXFET Power MOSFET (Pb-free) 34 Q1, Q10, Q12 3 2N7002-7-F FAIRCHILD 2N7002_SOT23-2N7002-7-F, SOT23 4 VALUE VOLTAGE/ TOL. POWER (%) MANUFACTURER DESCRIPTION AN1397.0 July 31, 2008 Application Note 1397 ISL62391LOEVAL1Z, ISL62392LOEVAL1Z Evaluation Board Bill of Materials ISL62391LOEVAL1Z and ISL62392LOEVAL1Z evaluation boards use the same PCB and schematic, thus the same bill of materials except for the controller U1. (Continued) NO REFERENCE DESIGNATOR QTY 35 Q11, Q13 2 SUD50N03-07 VISHAY SUD50N03_07_TO252-SUD50N03-07, TO252AA 36 SW1, SW2 2 GT11MSCBE-T C&K GT11MSCKE_SMT-GT11MSCBE-T, GT13MSCKE 37 TP5, TP6, TP7, TP8, TP9, TP10, TP13,TP14, TP15 9 5002 KEYSTONE TEST_POINT_THOLE-5002, MTP500x 38 TP1, TP2, TP3, TP4, TP11, TP12 6 1514-2 KEYSTONE TEST_POINT_THOLE-1514-2,TP-150C100P 39 J2, J3, J5, J6 4 131-5031-00 TEKTRONIX SCOPE_PROBE_5P_CONN-131-5031-00, TEK131-5031-00 40 J1, J4, J7 3 68000-236 FCI CONN2_DIP2-68000-236, CONN2 41 U2 1 78B04S GRAYHILL DIP_SW4_SPST_DIP-78B04S, DIP8-SW4 42 U1 1 ISL62391HRTZ, ISL62392HRTZ INTERSIL ISL62391HRTZ, 28 Ld 4x4 TQFN (ISL62392HRTZ, 28 Ld 4x4 TQFN) 43 U3, U4 2 HIP2100IBZ INTERSIL HIP2100_SOIC-HIP2100IBZ, SOIC8_150_50 44 L1, L2 2 4.7H VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP5050CE-01-4R7M, 4.7H,24A, 20%,VISHAY_IHLP-5050CE 45 R3, R25 2 Wire GENERIC Wire short 46 DCR SENSE 4 Wire GENERIC Wire short 47 Jumper Connector 3 SPC02SYAN SULLINS Connector Jumper for J1, J4, J7 48 1 PCB TBD ISL6239xEVAL1ZREVA PCB 49 1 Label TBD LABEL, FOR SERIAL NUMBER AND BOM REV # VALUE 50 C5, C27 2 No-pop 51 R4, R31, R36 3 No-pop 52 Q6, Q7, Q8, Q9 4 No-pop 5 VOLTAGE/ TOL. POWER (%) MANUFACTURER 20 DESCRIPTION AN1397.0 July 31, 2008 Application Note 1397 ISL62391HIEVAL1Z, ISL62392HIEVAL1Z Evaluation Board Bill of Materials The ISL62391HIEVAL1Z, ISL62392HIEVAL1Z evaluation boards use the same PCB and schematic as the ISL62391LOEVAL1Z, ISL62392LOEVAL1Z evaluation board but different bill of materials (BOM). The following table shows the BOM difference of ISL62391HIEVAL1Z, ISL62392HIEVAL1Z in comparison with ISL62391LOEVAL1Z, ISL62392LOEVAL1Z. NO. REFERENCE DESIGNATOR QTY 1 Q6, Q8 2 IRF7821PBF IR 30V 13.6A N-Channel HEXFET Power MOSFET (Pb-free) 2 Q7, Q9 2 IRF7832PBF IR 30V 20A N-Channel HEXFET Power MOSFET (Pb-free) 3 R8 1 14k 1/10W 1 GENERIC SM_RES_0603, 14k, 1/10W, 1%, TF, ROHS 4 R9 1 17.4k 1/10W 1 GENERIC SM_RES_0603, 17.4k, 1/10W, 1%, TF, ROHS 5 R11 1 23.2k 1/10W 1 GENERIC SM_RES_0603, 23.2k, 1/10W, 1%, TF, ROHS 6 R16 1 17.8k 1/10W 1 GENERIC SM_RES_0603, 17.8k, 1/10W, 1%, TF, ROHS 7 R13 1 15k 1/10W 1 GENERIC SM_RES_0603, 15k, 1/10W, 1%, TF, ROHS 8 R14 1 10k 1/10W 1 GENERIC SM_RES_0603, 10k, 1/10W, 1%, TF, ROHS 9 R7, R18, R19, R22 4 16.2k 1/10W 1 GENERIC SM_RES_0603, 16.2k, 1/10W, 1%, TF, ROHS 10 R30 1 0.2 1W 1 GENERIC SM_RES_2512, 0.2, 1W, 1%, TF, ROHS 11 R37 1 0.1 1W 1 GENERIC SM_RES_2512, 0.1, 1W, 1%, TF, ROHS 12 R35 1 4.02k 1/10W 1 GENERIC SM_RES_0603, 4.02k, 1/10W, 1%, TF, ROHS 13 R12, R15 2 590 1/10W 1 GENERIC SM_RES_0603, 590, 1/10W, 1%, TF, ROHS 14 C12, C14 2 1800pF 16V 10 GENERIC SM_CAP_0603, 1800PF, 16V, 10%, X7R, ROHS 15 C5, C27 2 330F 6.3V 10 SANYO-POSCAP SM_POLCAP_SMD, 6TPF330M9L, 330F, 6.3V, 10%, CAP_7343 16 L1, L2 2 2.2H 20 VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP-5050CE01-2R2M,2.2H, 29A, 20%, VISHAY_IHLP5050CE VALUE 6 VOLTAGE TOL. /POWER (%) MANUFACTURER DESCRIPTION AN1397.0 July 31, 2008 ISL6239xxxEVAL1Z Evaluation Board Schematic DESCRIPTION DATE APPR. +12V R26 R27 48.7K 1K C30 2N7002 F Q12 1200PF 19.6K C7 0.01UF 1UF C8 R9 0.01UF FCCM VCC LDO3EN C5 1UF VOUT1 J5 VOUT2 J3 PHASE1 J6 PHASE2 EN2 J1 1 2 VBAT TP3 U2 VCC 100K 100K R24 100K R23 B TP4 LDO3EN 78B04S FCCM Q3 IRF7832 ENGINEER: DRAWN AN1397.0 July 31, 2008 5 4 3 2 A REV: ISL62391LOEVAL1Z 6 56UF J7 1 2 TITLE: 7 C10 C C3 EN1 A 8 4.7UF C28 J2 0 J4 2 1 OPEN 4.7UF C26 R1 10UF 10UF C15 1UF C13 PHASE1 Q7 D TP6 TP13 TP8 TP9 TP10 Q2 IRF7821 4.7UH TP2 OPEN 10UF C24 10UF C23 C22 C19 C20 LDO3 R10 15.8K L1 TP11 TP12 OPEN C4 330UF C2 4.7UF C1 0 0.022UF OPEN VOUT2 1UF 100K R21 R3 VOUT1 4.7UF TP1 Q6 R7 0 OPEN TP7 C11 C6 R25 Q9 Q5 IRF7832 C21 PVCC VBAT B L2 4.7UH VBAT 4.7UF R19 45.3K C12 C 1200PF 750 R16 R12 10K 15.8K R11 C17 24.3K TP15 0.22UF FB2 VOUT2 ISEN2 OCSET2 EN2 PHASE2 UGATE2 C9 C25 0.022UF 330UF C27 750 R18 15.8K R13 68.1K C14 R15 100K TP5 R6 R4 OPEN R5 499 BOOT2 PGOOD FSET2 LGATE2 FCCM U1 PGND VCC ISL62391HRTZ PVCC VIN LDO3EN FSET1 LDO3 LGATE1 FB1 EP R8 R22 15.8K VOUT1 ISEN1 OCSET1 EN1 PHASE1 UGATE1 BOOT1 SW2 HIP2100 R37 LO VSS LI HI BAT54S R36 C16 VDD HB HO HS Q11 SUD50N03_07 1.58K U3 D3 200 0.47 R35 OPEN BY: REV A STEVE LAUR DATE: 05/14/08 SHEET: 1 1 OF 1 Application Note 1397 R34 D 10UF R30 R31 VOUT1 Q8 IRF7821 0.22UF Q10 Q4 EN2 PHASE2 EN1 C29 2N7002 R14 1K 9.09K 48.7K 2N7002 Q1 E 10UF C18 10UF R33 VBAT D1 R32 0 GRN SW1 HIP2100 R2 RED LO VSS LI HI PVCC SSL_LXA3025IGC 7 VDD HB HO HS BAT54S OPEN U4 Q13 200 1K 0.68 R29 SUD50N03_07 VOUT2 D2 R28 OPEN F E LTR 10UF TP14 ZONE Application Note 1397 ISL6239xxxEVAL1Z Evaluation Board Layout FIGURE 3. TOP SILKSCREEN 8 AN1397.0 July 31, 2008 Application Note 1397 ISL6239xxxEVAL1Z Evaluation Board Layout (Continued) FIGURE 4. BOTTOM SILKSCREEN 9 AN1397.0 July 31, 2008 Application Note 1397 ISL6239xxxEVAL1Z Evaluation Board Layout (Continued) FIGURE 5. LAYER 1 10 AN1397.0 July 31, 2008 Application Note 1397 ISL6239xxxEVAL1Z Evaluation Board Layout (Continued) FIGURE 6. LAYER 2 11 AN1397.0 July 31, 2008 Application Note 1397 ISL6239xxxEVAL1Z Evaluation Board Layout (Continued) FIGURE 7. LAYER 3 12 AN1397.0 July 31, 2008 Application Note 1397 ISL6239xxxEVAL1Z Evaluation Board Layout (Continued) FIGURE 8. LAYER 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 13 AN1397.0 July 31, 2008 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Intersil: ISL62391HIEVAL1Z ISL62391LOEVAL1Z ISL62392HIEVAL1Z