ISL62383 Triple-Output Evaluation Board User Guide ® Application Note July 31, 2008 Introduction TABLE 2. ENABLE TRUTH TABLE The ISL62383 evaluation board demonstrates the performance of ISL62383 triple-output controller. The ISL62383 controller includes two pulse-width modulation (PWM) controllers featured with Intersil’s patented R3 technology, adjustable from 0.6V to 5.5V, and one linear regulator LDO5, which generates a fixed 5V output and can deliver up to 100mA. The evaluation board includes two independent Enable switches, two LED Power-Good indicators and various test points. Included with each switching channel is an on-board dynamic load generator for evaluating the transient-load response. There are two different evaluation boards which provide flexible evaluation options. Table 1 shows a brief description of the evaluation boards. TABLE 1. EVALUATION BOARDS DESCRIPTION EVALUATION BOARD AN1398.0 CHANNEL-1 CHANNEL-2 OCP ISL62383LOEVAL1Z 3.3V/8A 5V/8A ~10A ISL62383HIEVAL1Z 1.05V/15A 1.5V/15A ~20A EN1 EN2 START-UP SEQUENCE Low Low Low Float Both Channels outputs OFF simultaneously Float Low Float Float Both Channels outputs OFF simultaneously Low High Channel-1 OFF, Channel-2 ON High Low Channel-1 ON, Channel-2 OFF High High Both Channels 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 Channels outputs OFF simultaneously Both Channels 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 What’s Inside The Evaluation Board Kit contains the following materials: VO CO ROCSET _ + VROCSET • ISL62383 Datasheet RO ISENx • ISL62383 Evaluation Board User Guide (this document) What’s Needed IL _ + VRSENSE ISL62383 10µA OCSETx • ISL62383xxEVAL1Z Evaluation Board RSENSE FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT The following materials will be needed in order to perform testing: • Adjustable +25V, 30A Power Supply • +12V, 100mA Power Supply • Precision Digital Multimeter • 3 Electronic Loads For Channel-1, the ISL62383 monitors the OCSET1 pin and the ISEN1 pin voltages. Once the OCSET1 pin voltage is higher than the ISEN1 pin voltage for more than 10µs, the ISL62383 declares an overcurrent fault. For a chosen overcurrent set point IOC and current sense resistor RSENSE, the value of ROCSET is determined by Equation 1: • 4-Channel Oscilloscope I OC • R SENSE R OCSET = ------------------------------------10μA Enable Control Where: 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 ISL62383 datasheet waveforms. Table 2 is the Enable controller truth table. 1 (EQ. 1) - ROCSET (Ω) 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; 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 1398 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 300µs pulse load across VOUT and GND. The transient load slew-rate can be trimmed by adjusting the resistors R29, R34 for the rising edge, and R23, R30 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 board. NAME FUNCTION/OPERATION INTERFACES AND CONNECTIONS TP3 VBAT VIN positive power input TP4 GND VIN return power input TP1 VOUT1 TP2 GND Channel-1 positive power output Channel-1 return power output TP11 VOUT2 TP12 GND Channel-2 return power output Channel-2 positive power output TP7 +12V +12V positive power input, used for the power supply of the on-board dynamic-load generator TP9 GND +12V return power input TEST POINTS J1 PHASE2 Scope-probe socket for measuring Channel-2 phase node J3 PHASE1 Scope-probe socket for measuring Channel-1 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 J6 FLOAT_EN1 Remove the jumper will float the EN1 pin J7 FLOAT_EN2 Remove the jumper will float the EN2 pin TP6 EN1 Test point of EN1 pin TP8 EN2 Test point of EN2 pin J1 PHASE2 Remove the jumper will float the FCCM pin Scope-probe socket for measuring Channel-2 phase node POWER-GOOD INDICATORS TP13 PGOOD1 Test point of PGOOD1 pin TP5 PGOOD2 Test point of PGOOD2 pin D1 Channel-1 Power-Good indicator. Green when VOUT1 is in regulation. D2 Channel-2 Power-Good indicator. Green when VOUT2 is in regulation. LINEAR REGULATORS TP14 LDO5 LDO5 linear regulator positive power output TP15 GND LDO5 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, and FCCM, respectively OFF: Low level for EN1, EN2, and FCCM, respectively 2 AN1398.0 July 31, 2008 Application Note 1398 Test Set-up Figure 2 shows a typical test configuration. + VOUT2 (0.6V~5.5V) - + LDO5 (5V) + VIN (5.5V~25V) - PROBE + 12V - + VOUT1 (0.6V~5.5V) - FIGURE 2. TYPICAL TEST CONFIGURATION 3 AN1398.0 July 31, 2008 Application Note 1398 ISL62383LOEVAL1Z Evaluation Board Bill of Materials NO. REFERENCE DESIGNATOR QTY 1 C6, C25 2 0.022µF 25V 10 GENERIC SM_CAP_0603, 0.022µF, 25V, 10%, X7R, ROHS 2 C8, C9 2 0.01µF 16V 10 GENERIC SM_CAP_0603, 0.01µF, 16V, 10%, X7R, ROHS 3 C17, C19 2 0.22µF 16V 10 GENERIC SM_CAP_0603, 0.22µF, 16V, 10%, X7R, ROHS 4 C13, C15, C22, C23 4 10µF 25V 10 GENERIC SM_CAP_1206, 10µF, 25V, 10%, X7R, ROHS 5 C12, C14 2 1200pF 16V 10 GENERIC SM_CAP_0603, 1200PF, 16V, 10%, X7R, ROHS 6 C7, C10 2 1µF 10V 10 GENERIC SM_CAP_0603, 1µF, 10V, 10%, X7R, ROHS 7 C11, C24 2 1µF 25V 10 GENERIC SM_CAP_1206, 1µF, 25V, 10%, X7R, ROHS 8 C1, C2, C28, C29 4 4.7µF 10V 10 GENERIC SM_CAP_0805, 4.7µF, 10V, 10%, X7R, ROHS 9 C21 1 4.7µF 10V 10 GENERIC SM_CAP_1206, 4.7µF, 10V, 10%, X7R, ROHS 10 C16, C18, C31, C32 4 10µF 16V 10 GENERIC SM_CAP_0805, 10µF, 16V, 10%, X5R, ROHS 11 C3 1 56µF 25V 20 SANYO-OSCON RADIAL_POLCAP_RADIAL, 25SP56M, 56µF, 25V, 20%, CASE-CC 12 C4, C26 2 330µF 6.3V 10 SANYO-POSCAP SM_POLCAP_SMD, 6TPF330M9L, 330µF, 6.3V, 10%, CAP_7343 13 R12, R15 2 750 1/10W 1 GENERIC SM_RES_0603, 750, 1/10W, 1%, TF, ROHS 14 R8 1 19.6k 1/10W 1 GENERIC SM_RES_0603, 19.6k, 1/10W, 1%, TF, ROHS 15 R9 1 24.3k 1/10W 1 GENERIC SM_RES_0603, 24.3k, 1/10W, 1%, TF, ROHS 16 R11 1 10k 1/10W 1 GENERIC SM_RES_0603, 10k, 1/10W, 1%, TF, ROHS 17 R13 1 68.1k 1/10W 1 GENERIC SM_RES_0603, 68.1k, 1/10W, 1%, TF, ROHS 18 R14 1 9.09k 1/10W 1 GENERIC SM_RES_0603, 9.09k, 1/10W, 1%, TF, ROHS 19 R7, R18, R19, R22 4 15.8k 1/10W 1 GENERIC SM_RES_0603, 15.8k, 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 R20, R23, R33 3 1k 1/10W 1 GENERIC SM_RES_0603, 1k, 1/10W, 1%, TF, ROHS 22 R30 1 1.58k 1/10W 1 GENERIC SM_RES_0603, 1.58k, 1/10W, 1%, TF, ROHS 23 R17, R32 2 48.7k 1/10W 1 GENERIC SM_RES_0603, 48.7k, 1/10W, 1%, TF, ROHS 24 R1, R2, R10 3 0 1/10W 1 GENERIC SM_RES_0603, 0, 1/10W, 1%, TF, ROHS 25 R29, R34 2 200 1/10W 1 GENERIC SM_RES_0603, 200, 1/10W, 1%, TF, ROHS 26 R5, R27 2 499 1/10W 1 GENERIC SM_RES_0603, 499, 1/10W, 1%, TF, ROHS 27 R6, R21, R24, R28, R31 5 100k 1/10W 1 GENERIC SM_RES_0603, 100k, 1/10W, 1%, TF, ROHS 28 R35 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, D2 2 SSL_LXA3025IGC LUMEX SSL_LXA3025IGC_SMD-SSLLXA3025IGC,LED_3X2_5MM 31 D3, D4 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, Q6, Q10, Q12 4 2N7002-7-F FAIRCHILD 2N7002_SOT23-2N7002-7-F, SOT23 35 Q11, Q13 2 SUD50N03-07 VISHAY SUD50N03_07_TO252-SUD50N03-07,TO-252AA VALUE 4 VOLTAGE TOL. /POWER (%) MANUFACTURER DESCRIPTION AN1398.0 July 31, 2008 Application Note 1398 ISL62383LOEVAL1Z Evaluation Board Bill of Materials (Continued) NO. REFERENCE DESIGNATOR QTY 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 J1, J2, J3, J5 4 131-5031-00 TEKTRONIX SCOPE_PROBE_5P_CONN-131-5031-00, TEK131-5031-00 40 J4, J6, J7 3 68000-236 FCI CONN2_DIP2-68000-236, CONN2 41 U2 1 78B03S GRAYHILL DIP_SW3_SPST_DIP-78B03S, DIP6-SW3 42 U1 1 ISL62383HRTZ INTERSIL ISL62383HRTZ, 28 Ld 3x3 TQFN 43 U3, U4 2 HIP2100IBZ INTERSIL HIP2100_SOIC-HIP2100IBZ, SOIC8_150_50 44 L1, L2 2 4.7µH VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP-5050CE01-4R7M,4.7µH, 24A, 20%, VISHAY_IHLP5050CE 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 J4, J6, J7 48 1 PCB TBD ISL62383EVAL1Z REV A PCB 49 1 Label TBD LABEL, FOR SERIAL NUMBER AND BOM REV # VALUE 50 C5, C27, C33, C34, C20, C30 No-pop 51 R4, R26, R36, R38 No-pop 52 Q7, Q8, Q9, Q14 No-pop 5 VOLTAGE TOL. /POWER (%) MANUFACTURER 20 DESCRIPTION AN1398.0 July 31, 2008 Application Note 1398 ISL62383HIEVAL1Z Evaluation Board Bill of Materials The ISL62383HIEVAL1Z evaluation board uses the same PCB and schematic as ISL62383LOEVAL1Z evaluation board but different bill of materials (BOM). The following table shows the BOM difference of ISL62383HIEVAL1Z in comparison with ISL62383LOEVAL1Z. NO. REFERENCE DESIGNATOR QTY 1 Q8, Q14 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 R35 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 R30 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 C30, C33 2 330µF 6.3V 10 SANYO-POSCAP SM_POLCAP_SMD, 6TPF330M9L, 330µF, 6.3V, 10%, CAP_7343 16 L1, L2 2 2.2µH 20 VISHAY VISHAY_IHLP_5050CE_SMT-20%-IHLP-5050CE01-2R2M,2.2µH, 29A, 20%, VISHAY_IHLP5050CE VALUE 6 VOLTAGE TOL. /POWER (%) MANUFACTURER DESCRIPTION AN1398.0 July 31, 2008 ISL62383xxEVAL1Z Evaluation Board Schematic R2 LDO5 F HI SW2 15.8K 1UF 10UF C24 C22 10UF C23 R18 C14 1200PF 750 R15 4.7UF C28 4.7UF C29 330UF OPEN C27 C20 OPEN C30 OPEN C26 R13 TP5 R14 9.09K 0.22UF TP11 D TP12 VOUT1 J5 VOUT2 J3 PHASE1 J1 PHASE2 C3 C 56UF C17 TP9 J2 TP3 15.8K R16 R19 45.3K 750 VBAT R1 0 VBAT 1UF HIP2100 VOUT2 4.7UF TP4 2 C11 1 LI R37 VSS HS OPEN HB HO R36 C32 10UF BAT54S LO SUD50N03_07 1.58K U3 Q11 200 0.47 D3 R34 R30 VDD 68.1K R6 100K R5 C19 R35 VOUT1 C Q9 EN1 10K R12 Q10 0.68 R11 C31 2N7002 E OPEN C21 LDO5 LGATE1 BOOT1 PGOOD1 EP C12 1K PGND VIN FSET1 24.3K IRF7832 Q5 ISL62383HRTZ LDO5 VCC1 1200PF R33 U1 VCC2 10UF R32 0.01UF 0 LGATE2 FCCM VCC1 1UF R9 R25 TP15 HIP2100 48.7K 499 R4 SSL_LXA3025IGC TP13 100K R28 SW1 R38 HI OPEN LI HS C8 FCCM L2 4.7UH J6 1 2 EN1 J7 1 2 EN2 J4 1 2 FCCM U2 B 330UF C5 OPEN C33 OPEN C34 OPEN C4 4.7UF C2 C1 L1 0 4.7UH Q2 TP10 PHASE1 OPEN Q7 TP2 78B03S 100K R3 TP8 100K R24 R7 15.8K B VCC1 TP6 IRF7821 100K R21 VOUT1 4.7UF TP1 C6 0.022UF Q14 R31 OPEN IRF7832 Q3 A REV: ENGINEER: DATE: DRAWN BY: SHEET: ISL62383LOEVAL1Z AN1398.0 July 31, 2008 8 7 6 5 4 3 2 A TITLE: A 05/22/08 1 1 OF 1 Application Note 1398 HO 19.6K C7 0.01UF C10 1UF FSET2 1 VSS C9 VBAT BOOT2 TP14 C16 LO HB PGOOD2 R8 1 10UF BAT54S 0 0.22UF U4 D 200 1K R10 LDO5 Q13 SUD50N03_07 R23 VDD OPEN 499 VOUT2 D4 R29 10UF 2 C15 1 10UF Q12 C25 0.022UF PHASE2 C18 2N7002 R22 15.8K Q8 2 C13 1 1K OPEN Q4 FB2 VOUT2 ISEN2 OCSET2 EN2 PHASE2 UGATE2 R20 EN2 IRF7821 2N7002 Q1 FB1 VOUT1 ISEN1 OCSET1 EN1 PHASE1 UGATE1 R17 48.7K VBAT 10UF 7 E D2 +12V GRN D1 2N7002 Q6 RED GRN TP7 RED SSL_LXA3025IGC R26 0 OPEN R27 F Application Note 1398 ISL62383xxEVAL1Z Evaluation Board Layout FIGURE 3. TOP SILKSCREEN 8 AN1398.0 July 31, 2008 Application Note 1398 ISL62383xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 4. BOTTOM SILKSCREEN 9 AN1398.0 July 31, 2008 Application Note 1398 ISL62383xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 5. LAYER 1 10 AN1398.0 July 31, 2008 Application Note 1398 ISL62383xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 6. LAYER 2 11 AN1398.0 July 31, 2008 Application Note 1398 ISL62383xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 7. LAYER 3 12 AN1398.0 July 31, 2008 Application Note 1398 ISL62383xxEVAL1Z 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 AN1398.0 July 31, 2008