ISL62386LOEVAL1Z and ISL62386HIEVAL1Z Quad-Output Evaluation Board User Guide ® Application Note August 25, 2009 Introduction TABLE 2. ENABLE TRUTH TABLE (Continued) The ISL62386 evaluation boards demonstrates the performance of the ISL62386 quad-output voltage controller. The ISL62386 includes two pulse-width modulated (PWM) controllers featuring Intersil’s patented R3 technology and two linear regulators, LDO5 and LDO3. The PWM controllers are adjustable from 0.6V to 5.5V, and the LDOs generate fixed 5V and 3.3V outputs respectively. The evaluation board includes independent Enable switches, one LED Power-Good indicator and numerous test points. Included with each switching channel is an on-board dynamic load generator for evaluating the transient-load response. There are two variations of the evaluation boards to provide flexible evaluation options. Table 1 shows a brief description of the evaluation boards. CHANNEL-1 CHANNEL-2 EN1 EN2 START-UP SEQUENCE Float High Channel-1 enabled after Channel-2 is in regulation High Float Channel-2 enabled after Channel-1 is in regulation 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 3.3V/8A 5V/8A ~10A ISL62386HIEVAL1Z 1.05V/15A 1.5V/15A ~20A IL VO _ + VRSENSE CO ROCSET _ + VROCSET OCP ISL62386LOEVAL1Z RSENSE ISL62386 10µA OCSETx TABLE 1. EVALUATION BOARD DESCRIPTION EVALUATION BOARD AN1456.0 RO ISENx FIGURE 1. RESISTOR CURRENT SENSE CIRCUIT What’s Needed The following materials will be needed to perform testing: • Adjustable +25V, 30A Power Supply • +12V, 100mA Power Supply • Precision digital multi-meter I OC • R SENSE R OCSET = ------------------------------------10μA • 4 Electronic Loads • 4-Channel Oscilloscope (EQ. 1) Where: 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. Table 2 is the enable controller truth table. For start-up timing sequence, please refer to the datasheet waveforms. . For Channel-1, the ISL62386 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 ISL62386 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 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 Both Channel outputs OFF simultaneously - 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 and R25 for Channel-2) 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; Both Channel outputs OFF simultaneously 1 Step 4: Replace C6 (C25 for Channel-2) with ROCSET; Step 5: Replace R19 (R18 for Channel-2) with ROCSET. 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. 2009. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1456 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 Connections and Test Points NUMBER 300µs pulse load across VOUT and GND. The transient load slew-rate can be trimmed by adjusting the resistors R34, R40 for the rising edge, and R38, R39 for the falling edge. +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 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 positive power output TP20 +12V +12V positive power input, used for the power supply of the on-board dynamic-load generator TP19 GND +12V return power input Channel-2 return power output TEST POINTS J1 PHASE2 Scope-probe socket for measuring Channel-2 phase node J3 PHASE1 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 Scope-probe socket for measuring Channel-1 phase node Remove the jumper will float the FCCM pin TP17 EN1 Test point of EN1 pin TP8 EN2 Test point of EN2 pin TP9 LDO3EN TP10 FCCM Test point of LDO3EN pin Test point of FCCM pin POWER-GOOD INDICATOR TP13 PGOOD D2 Test point of PGOOD pin LED Power-Good indicator. Green when both Channel-1 and Channel-2 are in regulation. LINEAR REGULATORS TP14 LDO5 LDO5 linear regulator positive power output TP15 GND LDO5 linear regulator return power output 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 High: High level for EN1, EN2, LDO3EN and FCCM, respectively Low: Low level for EN1, EN2, LDO3EN and FCCM, respectively 2 AN1456.0 August 25, 2009 Application Note 1456 Test Set-up Figure 2 shows a typical test configuration. + Vout2 (0.6V ~ 5.5V) - + 5V - + Vin (5.5V ~ 25V) + + 3.3V - Probe 12V - + (0.6V ~ 5.5V) Vout1 - FIGURE 2. TYPICAL TEST CONFIGURATION 3 AN1456.0 August 25, 2009 Application Note 1456 ISL62386LOEVAL1Z 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 C10, C16, C18 3 1µF 16V 10 GENERIC SM_CAP_0603, 1µF, 16V, 10%, X7R, ROHS 7 C30 1 1µF 25V 10 GENERIC SM_CAP_0805, 1µF, 25V, 10%, X7R, ROHS 8 C11, C24 2 1µF 25V 10 GENERIC SM_CAP_1206, 1µF, 25V, 10%, X7R, ROHS 9 C1, C2, C20, C21, C28, C29 6 4.7µF 10V 10 GENERIC SM_CAP_0805, 4.7µF, 10V, 10%, X7R, ROHS 10 C31, C32 2 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, 330UF, 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 R20, R33, R39 3 1k 1/10W 1 GENERIC SM_RES_0603, 1k, 1/10W, 1%, TF, ROHS 22 R38 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 2 0 1/10W 1 GENERIC SM_RES_0603, 0, 1/10W, 1%, TF, ROHS 25 R34, R40 2 200 1/10W 1 GENERIC SM_RES_0603, 200, 1/10W, 1%, TF, ROHS 26 R27 1 499 1/10W 1 GENERIC SM_RES_0603, 499, 1/10W, 1%, TF, ROHS 27 R21, R23, 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 D2 1 SSL_LXA3025IGC LUMEX SSL_LXA3025IGC_SMD-SSL-LXA3025IGC, 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 Q6, Q10, Q12 3 2N7002-7-F FAIRCHILD 2N7002_SOT23-2N7002-7-F, SOT23 4 VALUE VOLTAGE/ TOL. POWER (%) MANUFACTURER DESCRIPTION AN1456.0 August 25, 2009 Application Note 1456 ISL62386LOEVAL1Z Evaluation Board Bill of Materials (Continued) NO. REFERENCE DESIGNATOR QTY 35 Q11, Q13 2 SUD50N03-07 VISHAY SUD50N03_07_TO252-SUD50N03-07, TO-252AA 36 SW1, SW2 2 GT11MSCBE-T C&K GT11MSCKE_SMT-GT11MSCBE-T, GT13MSCKE 37 TP6, TP7, TP8, TP9, TP10, TP13, TP14, TP15, TP17, TP18, TP19, TP20 12 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 78B04S GRAYHILL DIP_SW4_SPST_DIP-78B04S, DIP8-SW4 42 U1 1 ISL62386HRTZ INTERSIL ISL62386HRTZ, 32 LD 5x5 TQFN 43 U3, U4 2 HIP2100IBZ INTERSIL HIP2100_SOIC-HIP2100IBZ,SOIC8_150_50 44 L1, L2 2 4.7µH 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 ISL62386EVAL1Z REVA PCB 49 1 Label TBD LABEL, FOR SERIAL NUMBER AND BOM REV # VALUE 50 C5, C27, C33, C34, C35, C36 6 No-pop 51 R26, R36, R41 3 No-pop 52 Q7, Q8, Q9, Q14 4 No-pop 5 VOLTAGE/ TOL. POWER (%) MANUFACTURER 20% VISHAY DESCRIPTION VISHAY_IHLP_5050CE_SMT-20%-IHLP5050CE-01-4R7M, 4.7µH, 24A, 20%, VISHAY_IHLP-5050CE AN1456.0 August 25, 2009 Application Note 1456 ISL62386HIEVAL1Z Evaluation Board Bill of Materials The ISL62386HIEVAL1Z evaluation board use the same PCB and schematic as the ISL62386LOEVAL1Z evaluation boards but different bill of materials (BOM). The following table shows the BOM difference of ISL62386HIEVAL1Z in comparison with ISL62386LOEVAL1Z. 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 R38 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 C33, C36 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 AN1456.0 August 25, 2009 ISL62386xxEVAL1Z Evaluation Board Schematic R2 LDO5 499 Q8 OPEN Q4 IRF7821 1UF 10UF C24 C22 EN2 1200PF 750 R18 UGATE2 15.8K R13 68.1K C14 R15 100K R28 D2 TP13 +12V TP20 10UF C23 VBAT GRN RED SSL_LXA3025IGC R26 OPEN R27 0 R22 C25 15.8K 0.022UF PGOOD BOOT2 FSET2 LGATE2 FSET1 24.3K BOOT1 EP OPEN EN1 C3 OPEN OPEN C34 C5 OPEN C33 330UF C2 4.7UF 4.7UF C1 TP2 C4 Q7 Q3 R24 100K R23 PHASE1 100K 4.7UH R21 0 TP10 VCC 100K L1 TP9 R31 R3 TP8 Q2 J6 2 1 EN1 J7 2 1 EN2 LDO3EN FCCM J4 2 1 100K VOUT1 15.8K OPEN 0.022UF Q14 IRF7821 R7 IRF7832 C6 OPEN U2 TP17 78B04S C29 4.7UF C28 C38 PHASE2 OPEN J1 C40 C39 PHASE1 10UF C11 TP19 TP1 4.7UF 56UF VBAT SW2 HIP2100 1UF C13 HI J3 10UF C15 HS 0 0.5 LI R37 VSS HO R36 HB OPEN 1UF C16 LO VOUT2 TP4 OPEN BAT54S J5 R1 SUD50N03_07 1.58K U3 VDD UGATE1 Q11 VOUT1 0.22UF J2 VBAT LGATE1 0.22UF R19 15.8K 0.22UF TP3 200 330UF TP15 D3 R34 R38 OPEN C26 C36 TP12 TP7 45.3K 750 VOUT1 R16 Q10 R12 C31 2N7002 10K C12 1K 1200PF R33 10UF R32 TP11 C17 R11 48.7K TP6 OPEN C27 LGATE1 LDO3EN 0.01UF C35 LDO3 OPEN LDO3EN FSET1 LDO3 C37 C8 VOUT2 TP14 VIN AGND1 R9 LDO5 LDO5 ISL62386HRTZ C21 1UF Q9 PGND U1 VCC Q5 4.7UF VCC 1UF FCCM AGND2 C10 0.71 SW1 HIP2100 R35 HI R41 LI HS OPEN HO 1UF C18 VSS FSET2 FCCM C30 LO 0.01UF FB1 VOUT1 ISEN1 OCSET1 EN1 NC1 PHASE1 UGATE1 BAT54S 0 Application Note 1456 SUD50N03_07 1K HB C9 Q13 C20 19.6K 200 U4 VDD R8 D4 R40 R39 R25 LGATE2 4.7UF VOUT2 VBAT IRF7832 C19 Q12 L2 4.7UH PHASE2 0.22UF C32 2N7002 PGOOD Q6 FB2 VOUT2 ISEN2 OCSET2 EN2 NC2 PHASE2 UGATE2 1K R14 R20 9.09K R17 48.7K 10UF 7 2N7002 AN1456.0 August 25, 2009 Application Note 1456 ISL62386xxEVAL1Z Evaluation Board Layout FIGURE 3. TOP SILKSCREEN 8 AN1456.0 August 25, 2009 Application Note 1456 ISL62386xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 4. BOTTOM SILKSCREEN 9 AN1456.0 August 25, 2009 Application Note 1456 ISL62386xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 5. LAYER 1 10 AN1456.0 August 25, 2009 Application Note 1456 ISL62386xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 6. LAYER 2 11 AN1456.0 August 25, 2009 Application Note 1456 ISL62386xxEVAL1Z Evaluation Board Layout (Continued) FIGURE 7. LAYER 3 12 AN1456.0 August 25, 2009 Application Note 1456 ISL62386xxEVAL1Z 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 AN1456.0 August 25, 2009