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dc2194af

DEMO MANUAL DC2194A

Linear Technology  Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417  

(408) 432-1900 

 

FAX

: (408) 434-0507 

 

www.linear.com

© LINEAR TECHNOLOGY CORPORATION 2016

LT 0216 • PRINTED IN USA

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

Summary of Contents for DC2194A

Page 1: ...users to trade off ripple noise for light load efficiency Discontinu ous Mode DCM of operation delivers higher efficiency at light load while Continuous Conduction Mode CCM is Board Photo preferred fo...

Page 2: ...utputs VIN 12V fSW 800kHz VOUT1 1 8V at IOUT1 4A VOUT2 1 2V at IOUT2 4A COUT 1x150 F 1x22 F per Channel VOUT1 P P 27mV Figure 8a VOUT2 P P 17mV Figure 8b Dynamic Load Transient Response VOUT1 P P VOUT...

Page 3: ...nt IOUT Dual Phase Single Output VIN 4 5V to 20V fSW 800kHz 8A Output Voltage Ripples Peak to Peak VOUT P P Dual Phase Single Output VIN 12V fSW 800kHz VOUT 1 8V at IOUT 8A COUT 1x100 F 1x47 F per cha...

Page 4: ...obe See Figure 2 for the proper scope probe placement technique Short still leads need to be soldered to the and terminals of an output capacitor The probe s ground ring needs to touch the lead and th...

Page 5: ...DC2194A Figure 1 Proper Measurement Equipment Setup Figure 2 Scope Probe Placement for Measuring Input or Output Voltage Ripple VIN 4 5V TO 20V LOAD1 0A TO 4A LOAD2 0A TO 4A VOUT1 VOUT2 VOUT GND COUT...

Page 6: ...y across COUT1 on DC2194A Optional Output Voltage Tracking TRK SS1 and TRK SS2 allow users to program output voltagesupplytrackingduringstart uporshutdownwhile operating several voltage supply rails a...

Page 7: ...Table 2 for recom mendedoptimizedswitchingfrequencywhileoperatingat low VIN voltage range Optional Operation with EXTVCC EXTVCC pinisavailableforoptionalexternal5Vbiassupply to power INTVCC DRVCC The...

Page 8: ...VOUT 3 3VOUT LOAD CURRENT A 0 EFFICIENCY 95 65 85 75 65 90 80 70 60 50 3 DC2194 F04 4 2 1 1 0VOUT 1 2VOUT 1 5VOUT 1 8VOUT 2 5VOUT 3 3VOUT LOAD CURRENT A 0 EFFICIENCY 95 65 85 75 65 90 80 70 60 50 3 DC...

Page 9: ...ure 10a Output Ripple Voltage Dual Phase Single Output Figure 10b Output Ripple Voltage Dual Phase Single Output 50 s DIV VOUT 50mV DIV ILOAD 2A DIV DC2194 F09a VO_P P 73mV 4A TO 6A fSW 800kHz VIN 12V...

Page 10: ...Single Output Figure 12b Thermal Performance at 20VIN Dual Phase Single Output fSW 800kHz VOUT1 1 8V VOUT2 1 2V VIN 12V ILOAD 4A PER PHASE TA 25 C NO FORCED AIRFLOW NO HEAT SINK fSW 800kHz VOUT1 1 8V...

Page 11: ...RES 60 4k 1 10W 1 0603 VISHAY CRCW060360K4FKEA 15 2 R9 R23 RES 255k 1 10W 1 0603 VISHAY CRCW0603255KFKEA 16 3 R11 R12 R29 RES 10k 1 10W 1 0603 VISHAY CRCW060310K0FKEA 17 1 R14 RES 2 2 1 10W 1 0603 VIS...

Page 12: ...TIONS ENGINEERING FOR ASSISTANCE THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND SCHEMATIC SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS SCALE NONE www linear com Thursday January 28 2016 1 2 HIG...

Page 13: ...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 HOWEVER IT REMA...

Page 14: ...ORY 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 INCIDENTA...

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