DEMO MANUAL DC1936A LTC3882EUJ Dual Output Step-Down DC/DC Controller with Power System Management DESCRIPTION Demonstration circuit 1936A is a high current, high efficiency, polyphase synchronous buck converter featuring the LTC3882EUJ, a dual output polyphase voltage mode controller. The LTC3882 has the PMBus interface and power system management functions. The DC1936A uses 6mm × 6mm DrMOS as the power stage. The input range of this board is from 7V to 14V, and the output voltage can be programmed from 0.8V to 1.8V. The DC1936A provides two outputs, with each output capable of 1V/30A. The DC1936A has optional discrete driver (LTC4449EDCB) and MOSFET footprints for high input voltage applications up to 38V. The DC1936A also has an on-board dynamic load circuit, which makes it easy for the customer to evaluate the transient performances. The DC1936A powers up to default settings and produces power based on configuration resistors or with its non-volatile memory without the need for any serial bus communication. This allows easy evaluation of the DC/ DC converter. To fully explore the extensive power system PERFORMANCE SUMMARY SYMBOL PARAMETER VIN Input Supply Range VOUT0,1 Output Voltage Range IOUT0,1 Output Current Range fSW Factory Default Switching EFF Peak Efficiency management features of the parts, download the GUI software LTpowerPlay™ onto your PC and use LTC’s I2C/ SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration settings within its onboard EEPROM, along with viewing telemetry parameters that include voltage, current, temperature and fault status. GUI Download The software can be downloaded from: http://www.linear.com/ltpowerplay For more details and instructions of LTpowerPlay, please refer to LTpowerPlay for LTC3880 Quick Start Guide. The LTC3882 operation in LTpowerPlay is similar to that of the LTC3880. Design files for this circuit board are available at http://www.linear.com/demo/DC1936A L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and LTPowerPlay is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Specifications are at TA = 25°C CONDITIONS IOUT = 0A TO 30A, VIN = 7V to 14V MIN TYP MAX 7 12 14 V 0.8 1 1.8* V 0 30 500 VIN = 12V, VOUT0 = 1V, See Figure 4 LOAD TRANSIENT Output Voltage Peak-to-Peak Spike During VIN = 12V, VOUT0 = 1V, ISTEP = 0A – 7.5A Load Transient UNITS A kHz 90.4 % 30 mV *Note: The DC1936A uses 4V-rated low ESR PosCAP (Part No. 4TPF470ML) as output capacitors for optimized load transient performance. If >3.6V VOUT is needed, 6.3V-rated output capacitors should be used. dc1936afa 1 DEMO MANUAL DC1936A QUICK START PROCEDURE Demonstration circuit 1936A makes it easy to set up to evaluate the performances of the LTC3882. Refer to Figure 2 for proper measurement equipment setup and follow the procedure below: 5.Turn on RUN switch as desired. NOTE: When measuring the input or output voltage ripple, care must be taken to avoid a long ground lead on the oscilloscope probe. Measure the output voltage ripple by touching the probe tip directly across the C10/C45. See Figure 3 for proper scope probe technique. NOTE: If there is no output, temporarily disconnect the load to make sure that the load is not set too high. 1.Make sure jumpers are in the following positions: JUMPER POSITION FUNCTION JP1 C GPIO0B to GPIO1B 6.Check for the correct output voltage from E6 to E7 for CH0 and from E8 to E9 for CH1. VOUT = 1V ± 0.5% (0.995V ~ 1.005V) 7.Once the proper output voltage is established, adjust the loads within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. 8.Connect the dongle and control the output voltages from the GUI. See LTpowerPlay QUICK START session for details. JP2 NC RUN0 to RUN1 JP3 ON 5V Bias for DrMOS JP4 ON Bias Supply for VCC of the LTC3882 Connecting a PC to DC1936A JP5 OFF Write Protection You can use a PC to reconfigure the power management features of the LTC3882 such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequencing parameters, the fault log, fault responses, GPIO and other functionality. The DC1613A dongle may be plugged in regardless of whether or not VIN is present. Dongle can be hot-plugged. 2.With power off, connect the input power supply to VIN and GND. Connect active load to the output. 3.Make sure RUN switch (SW3 and SW4) is OFF. 4.Turn on the power at the input. NOTE. Make sure that the input voltage does not exceed 16V. Figure 1. Demo Setup with PC dc1936afa 2 DEMO MANUAL DC1936A QUICK START PROCEDURE Measuring Efficiency for DC1936A (See Figure 2) To accurately measure efficiency of any configuration, do the following: n Set JP3 and JP4 to OFF position to disable the auxiliary circuits. n Measure VIN across the input ceramic capacitor (C6 for CH1, C39 for CH0). Measure VOUT across the output ceramic capacitor (C45 for CH1, C10 for CH0). n The efficiency is calculated as: Efficiency = VOUT •IOUT •100% VIN •IIN + VDR •IDR + VCC •ICC n Turn on one channel only. n Apply external 5V from E21 to E22 as the driver supply for DrMOS. Measuring Output Ripple Voltage n Apply external 5V from E5 to E29 as VCC for LTC3882. An accurate ripple measurement may be performed by using the configuration across C10 as shown in Figure 3. Figure 2. Power Test Setup for DC1936A dc1936afa 3 DEMO MANUAL DC1936A QUICK START PROCEDURE + – COUT VOUT GND Figure 3. Measuring Output Voltage Ripple 92 91 90 EFFICIENCY (%) 89 88 87 86 85 84 83 12VIN, 1VOUT, 500kHz 12VIN, 1.2VOUT, 500kHz 12VIN, 0.9VOUT, 500kHz 12VIN, 0.8VOUT, 500kHz 82 81 80 0 5 10 20 15 25 LOAD CURRENT (A) 30 35 dc1936a F04 Figure 4. Typical Efficiency Curves of DC1936A, VIN = 12V, fSW = 500kHz, Single Phase dc1936afa 4 DEMO MANUAL DC1936A QUICK START PROCEDURE Figure 5. Load Transient Waveform of DC1936A, VIN = 12V, VOUT0 = 1V, fSW = 500kHz, 0% to 25% Load Step Figure 6. Thermal Picture of DC1936A, VIN = 12V, VOUT0 = VOUT1 = 1V, IOUT0 = IOUT1 = 30A, fSW = 500kHz, No Airflow, TA = 25°C dc1936afa 5 DEMO MANUAL DC1936A LTpowerPlay SOFTWARE GUI LTpowerPlay is a powerful Windows based development environment that supports Linear Technology power system management ICs, including the LTC3880, LTC3883, LTC3882, LTC2974 and LTC2978. The software supports a variety of different tasks. You can use LTpowerPlay to evaluate Linear Technology ICs by connecting to a demo board system. LTpowerPlay can also be used in an offline mode (with no hardware present) in order to build a multichip configuration file that can be saved and reloaded at a later time. LTpowerPlay provides unprecedented diagnostic and debug features. It becomes a valuable diagnostic tool during board bring-up to program or tweak the power management scheme in a system, or to diagnose power issues when bringing up rails. LTpowerPlay utilizes the DC1613A USB-to-SMBus controller to communicate with one of many potential targets, including the LTC3882’s DC1936A demo system, or a customer board. The software also provides an automatic update feature to keep the software current with the latest set of device drivers and documentation. The LTpowerPlay software can be downloaded from: http://linear.com/ltpowerplay To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu. Figure 7. LTpowerPlay Main Interface dc1936afa 6 DEMO MANUAL DC1936A LTpowerPlay QUICK START PROCEDURE The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTC3882. 1. Download and install the LTPowerPlay GUI: d. If you want to change the output voltage to a different value, like 1.5V. In the Config tab, type in 1.5 in the VOUT_COMMAND box, like this: http://linear.com/ltpowerplay 2. Launch the LTpowerPlay GUI. a. The GUI should automatically identify the DC1936A. The system tree on the left hand side should look like this: b. A green message box shows for a few seconds in the lower left hand corner, confirming that the LTC3882 is communicating: c. In the Toolbar, click the R (RAM to PC) icon to read the RAM from the LTC3882. This reads the configuration from the RAM of LTC3882 and loads it into the GUI. Then, click the W (PC to RAM) icon to write these register values to the LTC3882. After finishing this step, you will see the output voltage will change to 1.5V. dc1936afa 7 DEMO MANUAL DC1936A LTpowerPlay QUICK START PROCEDURE If the write is successful, you will see the following message: e. You can save the changes into the NVM. In the tool bar, click RAM to NVM button, as following f. Save the demo board configuration to a (*.proj) file. Click the Save icon and save the file. Name it whatever you want. PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., X5R 22µF 25V 10% 1210 AVX, 12103D226KAT2A Required Circuit Components 1 4 C6, C7, C39, C40 2 5 C1, C3, C17, C33, C37 CAP., X7R 1µF 16V 10% 0603 AVX, 0603YC105KAT2A 3 2 C25, C32 CAP., X7R 3.3nF 25V 10% 0603 AVX, 06033C332KAT2A 4 2 C26, C31 CAP., X7R 330pF 16V 0603 AVX, 0603YC331KAT2A 5 1 C59 CAP., X7R 1µF 16V 10% 1206 AVX, 1206YC105KAT2A 6 3 C2, C16, C34 CAP., X5R 2.2µF 16V 10% 0603 TDK, C1608X5R1C225K 7 2 C27, C30 CAP., NPO 33pF 50V 5% 0603 AVX, 06035A330JAT2A 8 2 C4, C5 CAP., OS-CON, 330µF, 16V, 20%, F12 PANASONIC, 16SVP330M 9 3 C8, C54, C67 CAP., X7R 0.1µF 50V 10% 0603 AVX, 06035C104KAT2A 10 8 C9-C12, C45-C48 CAP., X5R 100µF 6.3V 1210 AVX, 12106D107MAT2A 11 6 C14, C15, C23, C41, C49, C50 CAP., POSCAP, 470µF, 4V, D3L SIZE PANASONIC, 4TPF470ML 12 1 C18 CAP., X5R 4.7µF 25V 0805 TAIYO YUDEN, TMK212ABJ475KG-T 13 2 C24, C66 CAP., X7R 0.22µF 25V 10% 0603 TDK, C1608X7R1E224K 14 2 C61, C62 CAP., X7R 2.2µF 6.3V 10% 0805 MURATA, GRM21BR70J225KA01L 15 6 C28, C29, C38, C51, C64, C65 CAP., X7R 0.01µF 50V 10% 0603 AVX, 06035C103KAT2A 16 2 L1, L2 INDUCTOR, SMT POWER IND. 0.22µH PULSE, PA0515.221NLT 17 2 Q1, Q2 TRANS GP SS PNP 40V SOT-23 ON SEMI., MMBT3906LT1G 18 13 R1, R21, R26-R28, R43, R44, R48, R49, R64, R68, R105, R45 RES., CHIP 0Ω, 0603 VISHAY, CRCW06030000Z0EA 19 4 R3, R51, R69, R104 RES., CHIP, 10Ω, 5%, 0603 VISHAY, CRCW060310R0JKEA 20 1 R31 RES., CHIP, 17.4k, 1%, 0603 VISHAY, CRCW060317K4FKEA 21 1 R32 RES., CHIP, 16.2k, 1%, 0603 VISHAY, CRCW060316K2FKEA 22 2 R29, R36 RES., CHIP, 357Ω, 1%, 0603 VISHAY, CRCW0603357RFKEA 23 2 R5, R54 RES., CHIP, 1Ω, 1%, 0603 NIC, NRC06F1R00TRF 24 2 R30, R33, R6, R13-R18, R56, R61, R72, R73, R86, R87, R88, R89 RES., CHIP, 10k, 5%, 0603 VISHAY, CRCW060310K0JKEA dc1936afa 8 DEMO MANUAL DC1936A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER 25 26 2 U1, U3 IC, HIGH FREQUENCY DrMOS MOUDLE FAIRCHILD, FDMF6820A 1 U2 IC, LTC3882EUJ, QFN 6mm x 6mm LINEAR TECH., LTC3882EUJ#10BJ-2PBF-ES 27 1 U4 IC, 24LC025-I/ST, SOIC MICROCHIP, 24LC025-I/ST AVX, 12103D226KAT2A Additional Demo Board Circuit Components 1 0 CIN1, CIN2, CIN3, CIN4 OPT CAP., X5R 22µF 25V 10% 1210 2 2 C35, C36 OPT CAP., X7R 47pF 5% 50V 0603 OPT 3 2 C60, C63 CAP., X5R 10µF 35V 1206 4 0 C55, C56, C57, C58, C19, C20, C21, C42, C43, C44 OPT CAP., 0603 5 0 D1, D2 OPT DIODE, SCHOTTKY, SOD-323 TAIYO YUDEN, GMK316BJ106ML-T 6 1 D6 DIODE, SCHOTTKY, SOD-323 CENTRAL SEMI., CMDSH-3TR 7 2 D3, D4 LED, 0603 GREEN WURTH ELEKTRONIK, 150060GS75000 8 1 D5 LED, 0603 RED WURTH ELEKTRONIK, 150060SS75000 9 0 D7, D8 DIODE, SOD-323 10 2 Q11, Q12 MOSFET SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-00#J0 11 0 Q3, Q4, Q5, Q6 OPT MOSFET SPEED SRS 30V 30A LFPAK RENESAS, RJK0305DPB-00#J0 12 0 Q7, Q8, Q9, Q10 OPT MOSFET JET SERIES 30V 45A LFPAK RENESAS, RJK0330DPB-00#J0 13 2 Q13, Q14 MOSFET P-CH 20V 0.58A SOT-23 VISHAY, TP0101K-T1-E3 14 2 Q15, Q16 MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD, 2N7002 15 2 SW1, SW2 CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K., JS202011CQN 16 0 R34, R35, R37-R42, R82-R85, R101, RES., CHIP, 0603 R102, R46, R47, R58, R59, R60, R66, R71, R98, R65, R70, R76, R77, R67, R103, R107 OPT 17 2 R8, R55 RES., CHIP, 1.21k, 1%, 0603 VISHAY, CRCW06031K21FKEA 18 2 R12, R63 RES., CHIP, 30Ω, 1%, 2512 VISHAY, CRCW251230R0FKEG 19 1 R62 RES., CHIP, 15.8k, 1%, 0603 VISHAY, CRCW060315K8FKEA 20 4 R79, R80, R19, R20 RES., CHIP, 4.99k, 1%, 0603 NIC, NRC06F4991TRF 21 2 R90, R91 RES., CHIP, 6.19k, 1%, 0603 VISHAY, CRCW06036K19FKEA 22 2 R92, R93 RES., CHIP, 0.01Ω, 1%, 2010 VISHAY WSL2010R0100FEA 23 4 R94, R95, R4, R52 RES., CHIP, 2k, 1%, 0603 VISHAY, CRCW06032K00FKEA 24 2 R96, R97 RES., CHIP, 200Ω, 1%, 0603 VISHAY, CRCW0603200RFKEA 25 2 R57, R99 RES., CHIP, 50Ω, 1%, 0603 VISHAY, CRCW060350R0FKEA 26 1 R100 RES., CHIP, 127Ω, 1%, 0603 VISHAY, CRCW0603127RFKEA 27 0 U5, U6 OPT N-CHANNEL MOSFET DRIVER, LTC4449IDCB 28 1 U7 IC, LT3029IMSE, MSOP, 16 PIN LINEAR TECH., LT3029IMSE#PBF dc1936afa 9 DEMO MANUAL DC1936A PARTS LIST ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Hardware: For Demo Board Only 1 29 E1-E29 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0 2 2 J1, J2 JACK, BANANA KEYSTONE, 575-4 3 4 J3-J6 STUD, TEST PIN PEM KFH-032-10 4 8 J3-J6 (X2) NUT, BRASS 10-32 ANY #10-32 5 4 J3-J6 RING, LUG #10 KEYSTONE, 8205, #10 6 4 J3-J6 WASHER, TIN PLATED BRASS ANY #10 7 1 J14 CONN RECEPT 2MM DUAL R/A 14POS (F) SULLINS, NPPN072FJFN-RC 8 1 J15 HEADER 14POS 2MM R/A GOLD (M) MOLEX, 87760-1416 9 1 J10 CONN HEADER 12POS 2MM STR DL PCB FCI 98414-G06-12ULF 10 5 JP1-JP5 0.079 SINGLE ROW HEADER, 3 PIN SULLIN, NRPN031PAEN-RC 11 5 JP1-JP5 SHUNT SAMTEC, 2SN-BK-G 12 2 J11, J12 CONN, BNC, 5 PINS CONNEX, 112404 13 2 SW1, SW2 CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K., JS202011CQN dc1936afa 10 A B C D OFF WP ON JP5 SDA SCL RUN1 RUN0 GPIO1B GPIO0B ALERTB E2 J2 J1 VDD25 2 SYNC SHARE_CLK GND GND VIN 7V - 14V E1 OPT OPT OPT OPT OPT R34 R37 R39 R41 R46 5 16.2k R32 R13 10K R47 R42 R40 R38 R35 R31 R14 10K C4 + 330uF 16V SVP VIN OPT OPT OPT OPT OPT 17.4k R15 10K R17 10K VIN R18 10K IAVG_GND R5 1 IAVG1 IAVG0 PHAS_CFG FREQ_CFG VOUT1_CFG VOUT0_CFG ASEL1 ASEL0 WP SYNC U2 R54 1 LTC3882EUJ SHARE_CLK RUN1 RUN0 GPIO1 GPIO0 ALERT SDA SCL 1uF C17 VDD25 E4 VDD25 C8 100nF IAVG0 VFB1 VCOMP1 0 0 0 0 R58 R59 R60 R98 VDD33 E5 BG0/EN0 28 27 32 33 34 30 29 3 2 1 40 35 36 37 38 6 7 C18 4.7uF 4 R21 0 20 19 18 17 16 15 14 13 12 11 U3 SW1 C32 3.3nF R36 C28 10nF PGND PGND PGND PGND PGND VSWH VIN VIN VIN VIN C1 1uF Q1 C33 1uF 357 357 PAD1 R1 C2 2.2uF 16V 0 3 R3 10 PWM R4 2k PAD4 R49 C29 10nF 0 C34 2.2uF 16V Q2 VSWH VSWH VSWH VSWH VSWH GL CGND NC DISB# PWM R52 2k C37 1uF R51 10 5V_BIAS SGND AND PGND CONNECTED AT A SINGLE NODE NEAR U2 PLACE Q1,Q2 NEAR L1,L2. RESPECTIVELY VSWH VSWH VSWH VSWH VSWH GL CGND NC DISB# 1uF C3 5V_BIAS 2. INSTALL SHUNTS AS SHOWN. 3 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTE: UNLESS OTHERWISE SPECIFIED 20 19 18 17 16 15 14 13 12 11 PAD7 TG1_PWM1 330pF 330pF PGND PGND PGND PGND PGND VSWH VIN VIN VIN VIN C25 3.3nF R29 PAD8 TG0_PWM0 FDMF6820A C40 22uF 1210 VIN 0 R44 VFB1 R48 C39 22uF 1210 C31 33pF VCOMP1 R33 10k U1 SW0 C26 0 33pF R26 0 C30 C27 C7 22uF 1210 VIN FDMF6820A C6 22uF 1210 VCOMP0 R30 10k E29 GND FSW=500kHz BG1/EN1 TG1/PWM1 ISENSE1+ ISENSE1- VSENSE1+ FB1 COMP1 TSNS1 TSNS0 COMP0 FB0 VSENSE0- VSENSE0+ ISENSE0- ISENSE0+ VSENSE1+ IAVG1 VCOMP0 VCC VCC TG0/PWM0 OPTIONAL FOR 2-PHASE OPERATION C35 OPT 31 39 21 20 19 18 17 16 23 8 24 15 14 13 12 11 10 9 2.2uF C16 VDD33 R19 R20 4.99K 4.99K E3 VDD33 VSENSE0+ C36 OPT IAVG1 IAVG0 Address=4C R16 10K C5 + 330uF 16V SVP 4 7 VIN 3 1 25 VDD33 22 VDD25 IAVG_GND 5 26 VCC 4 VINSNS GND PGND 21 PGND 21 41 10 9 42 8 VIN VIN VIN NC 22 PHASE PGND 7 PGND 22 5 41 23 6 6 GH PGND 24 10 9 42 8 2 CGND GND PGND 25 4 PGND 26 VIN VIN VIN NC PGND 5 41 PGND 25 1 BOOT 2 PGND 3 VCIN VDRV 27 PHASE PGND 23 GH PGND 24 CGND GND PGND 26 4 BOOT PGND 27 VCIN 3 VDRV PGND 28 SMOD# VSWH VSWH VSWH 43 29 30 1 SMOD# PGND 28 VSWH VSWH VSWH 43 29 30 5 PAD3 31 32 33 34 35 36 37 38 39 40 PAD6 PAD5 TG1_PWM1 31 32 33 34 35 36 37 38 39 40 PAD2 R56 10K SW0 R55 C66 C20 470uF OPT + C11 100uF 1210 C45 C46 100uF 100uF 1210 1210 2 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. C41 470uF D3L + HZ SCALE = NONE YI S. C50 470uF D3L 0 + R28 R12 30 1W 0 C15 470uF D3L 2 2 E9 E8 E7 E6 1 J6 J3 J4 J5 GND HAORAN W. YI S. APPROVED DATE 6-14-14 12-10-14 DATE: N/A SIZE 1 DEMO CIRCUIT 1936A LTC3882EUJ Friday, January 23, 2015 IC NO. SHEET 1 2 OF 3 REV. DUAL/POLY-PHASE HIGH PERFORMANCE DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only VOUT1 ADJ, MAX 30A GND VOUT1 VOUT0- VOUT0+ GND VOUT0 ADJ, MAX 30A PRODUCTION PRODUCTION ASSEMBLY DESCRIPTION REVISION HISTORY TECHNOLOGY R63 30 1W REV R27 + __ ECO TITLE: SCHEMATIC C49 470uF D3L + C44 470uF OPT C14 470uF D3L + APPROVALS C48 100uF 1210 + C43 470uF OPT + VSENSE1+ C23 470uF D3L + C21 470uF OPT C42 470uF OPT + C12 100uF 1210 + C47 100uF 1210 VOUT1 0 C19 470uF OPT R45 CUSTOMER NOTICE 0 R43 VSENSE0- VSENSE0+ + C9 C10 100uF 100uF 1210 1210 VOUT0 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. SW1 PULSE PA0515.221 L2 0.22uH 0.22uF 0.22uF 1.21k C24 1.21k R8 PULSE PA0515.221 L1 0.22uH R6 10K TG0_PWM0 2 A B C D DEMO MANUAL DC1936A SCHEMATIC DIAGRAM dc1936afa 11 A B C D 4 3 2 1 SDA SCL WP VCC GND E20 24LC025-I/ST VSS A2 A1 A0 U4 5 TO DC1613A AUXP SDA GND SCL LGKPWR ALERTB GPIO_1 OUTEN_0 OUTEN_1 GND AUXSCL AUXSDA J10 C54 100nF 5 6 7 EESDA EESCL EEWP 8 AUXVCC 1 2 3 4 5 6 7 8 9 10 11 12 3V3 R79 4.99K R80 4.99K ALERTB 3 2 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 OPT OPT R77 GPIO0B E13 SCL DEMO HEADER (M) FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V SCL E12 SDA R76 J15 SDA E11 ALERTB 1 D4 R105 0 R103 OPT 1206 GPIO1B R107 OPT 1 R70 OPT D3 GPIO1 2N7002A Q16 GREEN FAULTB CTRL ALERTB SDA SHARE_CLK SCL RESETB AUXP UNUSED UNUSED GND GND 12V 12V OPT 3 THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 SCALE = NONE YI S. HZ APPROVALS ALERTB 1 5 OFF ON SW3 RUN1 R67 OPT D5 ALERTB RED C38 10nF 0603 TP0101K Q14 C51 10nF 0603 R61 10K 3 2 GPIO0B 2 E19 VDD33 GND VDD33 RUN1 RUN1 RUN0 RUN0 E18 R62 15.8K 0603 GPIO1B GPIO1B GPIO0B E17 E16 E10 R73 10k R104 10 0603 1 DATE: N/A SIZE 1 DEMO CIRCUIT 1936A Wednesday, December 10, 2014 IC NO. SHEET 2 2 OF 3 REV. DUAL/POLY-PHASE HIGH PERFORMANCE DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT LTC3882EUJ 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only 3V3 VCC OFF 5 ON SW4 RUN0 VDD33 1 TECHNOLOGY TP0101K Q13 R100 127 3V3 2 0603 R69 10 0603 R65 OPT C NC RUN0-RUN1 3 JP2 R72 10k D7 OPT TITLE: SCHEMATIC 1 D8 OPT C NC GPIO0-GPIO1 3 JP1 J14 DEMO HEADER (F) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 R71 R68 0 R66 OPT R97 200 3V3 CUSTOMER NOTICE 3V3 E15 E14 R64 0 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. 2N7002A Q15 GREEN GPIO0 R96 200 3V3 VIN VIN SHARE_CLK SYNC SYNC SHARE_CLK 2 ALL PARTS ON THIS PAGE ARE FOR DEMO ONLY, NOT NEEDED IN CUSTOMER DESIGN 3 2 2 4 3 2 4 1 6 3 2 3 4 1 6 3 12 1 5 A B C D DEMO MANUAL DC1936A SCHEMATIC DIAGRAM dc1936afa Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. A B C OFF ON 5V_BIAS JP3 C67 0.1uF 2 R86 10K VIN 5 GND 5V_BIAS D6 E22 E21 1206 C63 10uF 5V_BIAS R101 VIN C58 2.2uF 0 R94 2K R90 6.19K C64 0.01uF C59 U7 1uF LT3029IMSE TG1_PWM1 VDD33 R84 2.2 16 1 3 4 15 IN VLOGIC VCC ADJ1 BYP1 VOUT1 VOUT1 R82 U5 0 9 GND LTC4449EDCB BOOST SHDN1 VIN 5 6 7 8 14 VIN1 5V_BIAS 12 VIN2 D 1 3 1 2 11 2 BG TS TG D2 ADJ2 BYP2 VOUT2 VOUT2 9 8 6 7 10 GND SHDN2 VIN2 4 3 2 1 1 4 C65 0.01uF 4 R95 2K C60 10uF 1206 VCC 4 Q7 RJK0330DPB R91 6.19K C55 0.22uF Q3 RJK0305DPB 5 1 2 3 5 2 1 2 3 ON VCC OFF JP4 R87 10K VIN 4 Q8 RJK0330DPB 4 Q4 RJK0305DPB 1 3 5 1 2 3 5 1 2 3 OPTIONAL FOR DISCRETE DRIVER AND FETS SW1 CIN1 22uF 16V 1210 VIN R102 TG0_PWM0 VDD33 PULSE0 IN GND 3 E27 DO NOT EXCEED 5% DUTY CYCLE! E23 R88 10K 4 Q11 RJK0305DPB VOUT0 C57 2.2uF 0 R85 2.2 5V_BIAS DYNAMIC LOAD CIRCUIT 0 CIN2 22uF 16V 1210 2 R92 0.01 5 6 7 8 IN 1 J11 GND BG TS TG D1 C56 0.22uF PULSE1 IN E24 GND SCALE = NONE YI S. HZ APPROVALS E28 VOUT1 VIN SW0 R93 0.01 CIN3 22uF 16V 1210 IOUT1 TST 50 1 TECHNOLOGY NOTE: PULSE OUT 10mV / AMP E26 C62 2.2uF R99 CIN4 22uF 16V 1210 J12 1 1630 McCarthy Blvd. Milpitas, CA 95035 Phone: (408)432-1900 www.linear.com Fax: (408)434-0507 LTC Confidential-For Customer Use Only VOUT1 DATE: N/A SIZE DEMO CIRCUIT 1936A LTC3882EUJ 1 Wednesday, December 10, 2014 IC NO. SHEET 3 2 OF 3 REV. DUAL/POLY-PHASE HIGH PERFORMANCE DC/DC CONVERTER WITH DIGITAL POWER MANAGEMENT TITLE: SCHEMATIC R89 10K 4 Q12 RJK0305DPB DO NOT EXCEED 5% DUTY CYCLE! THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. 2 4 Q10 RJK0330DPB 4 Q6 RJK0305DPB DYNAMIC LOAD CIRCUIT 1 4 Q9 RJK0330DPB 4 Q5 RJK0305DPB CUSTOMER NOTICE VOUT0 4 3 2 1 1 LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO PCB DES. VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED APP ENG. CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. NOTE: PULSE OUT 10mV / AMP E25 50 9 GND IOUT0 TST R57 C61 2.2uF VLOGIC VCC BOOST 0 LTC4449EDCB U6 R83 2 OPTIONAL FOR DISCRETE DRIVER AND FETS 5 1 2 3 3 2 3 4 5 5 1 2 3 5 1 2 3 5 1 2 3 5 1 2 3 4 2 3 4 5 13 VIN1 NC 2 GND 5 GND 17 5 1 2 3 5 A B C D DEMO MANUAL DC1936A SCHEMATIC DIAGRAM dc1936afa 13 DEMO MANUAL DC1936A DEMONSTRATION BOARD IMPORTANT NOTICE Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions: This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations. If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.). No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive. Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged. This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application engineer. Mailing Address: Linear Technology 1630 McCarthy Blvd. Milpitas, CA 95035 Copyright © 2004, Linear Technology Corporation dc1936afa 14 Linear Technology Corporation LT 0115 REV A • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2015