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dc1989acf

DEMO MANUAL DC1989A-C

Quick start proceDure

Figure 2. Proper Measurement Equipment Setup

Figure 3. Measuring Output Voltage Ripple

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Summary of Contents for DC1989A-C

Page 1: ... ationoftheDC DCconverter Tofullyexploretheextensive powersystemmanagementfeaturesofthepart download the GUI software LTpowerPlay onto your PC and use LTC s I2C SMBus PMBus dongle DC1613A to connect to L LT LTC LTM Linear Technology the Linear logo Dust Networks and Dust are registered trademarks and LTpowerPlay is a trademark of Linear Technology Corporation All other trademarks are the property ...

Page 2: ...for the proper scope probe technique Short stiff leads need to be soldered to the and terminals of an output capacitor The probe s ground ring needs to touch the lead and the probe tip needs to touch the lead Connecting a PC to DC1989A C You can use a PC to reconfigure the power management features of the LTM4676 such as nominal VOUT margin setpoints OV UVlimits temperaturefaultlimits sequenc ing ...

Page 3: ...3 dc1989acf DEMO MANUAL DC1989A C Quick Start Procedure Figure 2 Proper Measurement Equipment Setup Figure 3 Measuring Output Voltage Ripple ...

Page 4: ...Quick Start Procedure Figure 4 Demo Setup with PC Figure 5 Efficiency vs Load Current at VIN 5V and VIN 12V Efficiency vs Load Current 100 90 70 80 60 50 LOAD CURRENT A EFFICIENCY 0 100 90 80 70 10 40 50 60 30 20 VIN 5V VIN 12V VOUT0 1V ...

Page 5: ...t Sharing at VIN 12V VOUT0 1V Based on the Current Readback Figure 7 Output Voltage Ripple at VIN 12V VOUT0 1V IOUT0 100A Figure 10 Total Current Readback vs Load Current at VIN 12V VOUT0 1V 0 10 20 30 100 50 40 60 90 70 80 LOAD CURRENT A PHASE CURRENT A 14 12 8 10 6 2 4 0 2 IOUT_PHASE 1 IOUT_PHASE 2 IOUT_PHASE 3 IOUT_PHASE 4 IOUT_PHASE 5 IOUT_PHASE 6 IOUT_PHASE 7 IOUT_PHASE 8 LOAD CURRENT A 0 TOT...

Page 6: ...ring 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 LTM4676 the LTC3880 and the LTC3883 s demo system or a customer board The software also provides an automatic update feature to keep the software current with t...

Page 7: ...iguration from the RAM of LTM4676 and loads it into the 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 Then click the W PC to RAM icon to write these registervaluestotheLTM4676 Afterfinishingthisstep you will see the output voltage will change to 1 5V If the write is successful you will see the following...

Page 8: ...ANASONIC LN1371SGTRP 17 1 D3 LED RED S TYPE GULL WING SMD PANASONIC LN1271RTR 18 1 J7 CONN HEADER 12POS 2MM STR DL PCB FCI 98414 G06 12ULF 19 1 J8 PIN HEADER 20 DUAL ROW RA M Mill Max 802 40 020 20 0001 20 1 J9 CONN SOCKET 20 DUAL ROW RA F Mill Max 803 43 020 20 001 21 2 J10 J11 CONN BNC 5 PINS CONNEX 112404 22 1 Q1 MOSFET P CH 20V 0 58A SOT 23 VISHAY TP0101K T1 E3 23 2 Q2 Q3 MOSFET N CH 60V 115mA...

Page 9: ...S202011CQN 55 4 U1 U2 U3 U4 IC LTM4676EY LINEAR TECH LTM4676EY 56 1 U5 IC 24LC025T E OT SOT 23 6 LEAD MICROCHIP 24LC025T E OT 57 1 U6 IC LT1129CS8 5 S8 LINEAR TECH LT1129CS8 5 58 1 U7 IC LTC6992 1 S6 TSOT LINEAR TECH LTC6992CS6 1 59 1 U8 IC LT1803IS5 S5 TSOT LINEAR TECH LT1803IS5 Additional Demo Board Circuit Components 1 0 C1 COUT2 C2 COUT3 OPT C6 C8 C9 COUT10 C10 COUT11 C11 COUT13 COUT14 C13 C14...

Page 10: ... HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY...

Page 11: ...OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 2 Tuesday May 28 2013 2 6 HIGH EFFICIENCY POLY ...

Page 12: ...CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AN...

Page 13: ...CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVER IT REMAINS THE CUSTOMER S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AN...

Page 14: ... 6 HIGH EFFICIENCY POLY PHASE DC DC STEP DOWN HZ JIAN L B LTM4676EY DEMO CIRCUIT 1989A C SIZE DATE IC NO REV SHEET OF TITLE APPROVALS PCB DES APP ENG TECHNOLOGY Fax 408 434 0507 Milpitas CA 95035 Phone 408 432 1900 1630 McCarthy Blvd LTC Confidential For Customer Use Only CUSTOMER NOTICE LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER SUPPLIED SPECIFICATIONS HOWEVE...

Page 15: ...COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com 2 Friday March 15 2013 6 6 HIGH EFFICIENCY POLY PHASE DC DC STEP DOWN HZ JIAN L B L...

Page 16: ...CLUDING 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 g...

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