dc1477a-ltm4609ev evaluation kit quick start guide
TRANSCRIPT
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DEMO MANUAL DC1477A
DESCRIPTION
LTM4609EV: 36VIN, 34VOUT Buck-Boost
DC/DC µModule® Regulator
Demonstration circuit DC1477A features the LTM®4609EV, a high voltage, high efficiency, high density switch mode buck-boost power module. The LTM4609EV regulates an output voltage above, below or equal to the input voltage. DC1477A accepts an input voltage from 10V to 36V with a preset output voltage of 30V at up to 3A. Derating may be necessary for certain VIN, VOUT and thermal conditions. An input π filter option is included on the DC1477A to minimize the input ripple. The switching frequency may be synchronized to an external clock from 200kHz to
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
BOARD PHOTO
400kHz to reduce undesirable frequency harmonics and/or parallel multiple modules for even higher output cur-rent. The LTM4609 data sheet must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC1477A
Design files for this circuit board are available at http://www.linear.com/demo
(TA = 25°C)
PARAMETER CONDITION VALUE
Minimum Input Voltage 10V to 36V
Output Voltage VOUT 30V ±2%
Maximum Continuous Output Current Derating is Necessary for certain VIN, VOUT and Thermal Conditions
3A DC at 10VIN 8A DC at 24VIN 10A DC at VIN > 30V
Default Operating Frequency 300kHz
Efficiency VIN = 20V, VOUT = 30V, IOUT = 3A 96.7%, See Figure 3 for More Information
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DEMO MANUAL DC1477A
QUICK START PROCEDUREDemonstration circuit DC1477A is an easy way to evaluate the performance of the LTM4609EV. Please refer to Figure 1 for proper measurement equipment setup and follow the procedure below:
1. Place jumpers in the following positions for a typical 30VOUT application:
RUN CLOCK MODE START
ON PROG CCM SSO
2. With the power supply off, connect the input power supply, load and meters as shown in Figure 1. Preset the load to 0A and VIN supply between 10V to 36V.
3. Turn on the power at the input. The output voltage should be 30V ±2%.
4. Once the proper output voltage is established, adjust the load within the operating range and observe the output voltage regulation, ripple voltage, efficiency and other parameters. A cooling fan and heat sink are necessary for VIN < 10V and IOUT = 3A.
5. To measure input and output ripple, please refer to Figure 2 for proper setup.
6. To adjust the switching frequency turn off the power supply and modify R6 and R7. Do not allow voltage at pin PLLFLTR to exceed 2.4V.
7. Inductor and RSENSE should be modified to accom-modate certain input and output condition. Refer to the data sheet for details.
8. The input filter formed by CIN2, L2 and L3, CIN3 and CIN4 is for the purpose of reducing the input voltage ripple. The magnetic beads L2 and L3 are not necessary, but they help to reduce the high frequency ringings on the input supply significantly. See Figure 5 for details.
9. The optional components Rsnb1 and Csnb1, Rsnb2 and Csnb2 can be used to form RC snubber circuits on the switching nodes, which may help to reduce the output ripple. Refer to the data sheet for details.
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DEMO MANUAL DC1477A
QUICK START PROCEDURE
Figure 1. Test Setup of DC1477A
Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple
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DEMO MANUAL DC1477A
QUICK START PROCEDUREDC1477A/LTM4609 Efficiency at 10VIN Input
DC1477A/LTM4609 Efficiency at 30VIN Input
Figure 3. Measured Efficiency at Different VIN
DC1477A/LTM4609 Efficiency at 20VIN Input
DC1477A/LTM4609 Efficiency at 36VIN Input
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DEMO MANUAL DC1477A
QUICK START PROCEDURE
VIN = 10V, VOUT = 30V, CCM Mode1.5A to 3A Load StepCOUT = 2 × 10µF Ceramic + 2 × 100µF Alum
VIN = 10V, VOUT = 30V, IOUT = 3AW/O Input Filter: Short L2 and L3, Remove CIN2VIN Peak-to-Peak Ripple = 2.78V
VIN = 10V, VOUT = 30V, IOUT = 3AW Input Filter: Stuff L2, L3 and CIN2VIN Peak-to-Peak Ripple = 0.47V
VIN = 36V, VOUT = 30V, CCM Mode1.5A to 3A Load StepCOUT = 2 × 10µF Ceramic + 2 × 100µF Alum
Figure 4. Measured Load Transient Response (1.5A Step, 50% to 100% )
Figure 5. Input Voltage Ripple Measured at CIN1 with 300MHz BW Probe, with and without the Input Filter
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DEMO MANUAL DC1477A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CSS CAP., X7R, 0.1µF, 25V, 10%, 0603 AVX, 06033C104KAT4A
2 1 CIN1 CAP., ALUMINUM, 100µF, 20%, 50V SANYO, 50ME100WX+TS (now SUNCON 50ME100WX)
3 2 CO3, CO4 CAP., X7R, 10µF, 35V, 10%, 1210 MURATA, GRM32ER7YA106KA12L
4 3 CIN2, CIN3, CIN4 CAP., X7R, 4.7µF, 50V, 10%, 1206 Taiyo Yuden, UMK316BJ475KL-T
5 2 CO5, CO6 CAP., ALUMINUM, 100µF, 35V SANYO, 35HVH100M (now SUNCON 35HVH100M)
6 1 L1 IND. POWER IND, 3.3µH VISHAY, IHLP5050FDER3R3M01
7 1 R1 RES., CHIP, 100k, 1/16W, 5%, 0603 VISHAY, CRCW0603100KJNEA
8 1 R5 RES., CHIP, 2.74k, 1/16W, 1%, 0603 VISHAY, CRCW06032K74FKEA
9 1 R6 RES., CHIP, 4.64k, 1/16W, 1%, 0603 VISHAY, CRCW06034K64FKEA
10 1 R7 RES., CHIP, 1.21k, 1/16W, 1%, 0603 VISHAY, CRCW06031K21FKEA
11 2 RS1,RS2 RES., CHIP, 0.015Ω 1/2W, 1%, 1206 IRC, LRC-LRF1206-01-R015-F
12 1 U1 I.C., LTM4609EV#PBF, 15mm x 15mm x 2.8mm LGA
LINEAR TECH., LTM4609EV#PBF
Additional Demo Board Circuit Components
1 0 CIN5, Csnb1, Csnb2 (OPT) CAP., 1206
2 0 C2, C4, C5, CP, CFF (OPT) CAP., 0603 50ME100WX+TS
3 0 CO1, CO2 (OPT) CAP., SVP, 100µF, D3L
4 0 CO7 (OPT) CAP., 1206, 35V
5 0 CO8 (OPT) POSCAP, D3L
6 2 D1, D2 ZENER DIODE,4.7V Central Semi., CMDZ5230B-7-F
7 2 L2, L3 IND. POWER IND, 0.4µH, 1806 Fair-Rite, 2518065007Y6
8 1 R2 RES., CHIP, 51k, 1/16W, 5%, 0603 VISHAY, CRCW060351K0JNEA
9 1 R8 RES., CHIP, 20k, 1/16W, 1%, 0603 VISHAY, CRCW060320K0FKEA
10 0 RS3, Rsnb1, Rsnb2 (OPT) RES.,1206
11 0 R9, RUVLO (OPT) RES., 0603
Hardware: For Demo Board Only
1 2 JP1, JP2 2MM SINGLE ROW HEADER, 3-PIN SAMTEC, TMM-103-02-L-S
2 2 JP3, JP4 2MM SINGLE ROW HEADER, 4-PIN SAMTEC, TMM-104-02-L-S
3 4 JP1, JP2, JP3, JP4 SHUNT SAMTEC, 2SN-BK-G
4 10 TP1, TP4, TP5, TP7, TP9, TP11-TP15
TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0
5 4 TP2, TP3, TP8, TP10 BANANA JACK, KEYSTONE, 575-4
6 4 STAND OFF STAND-OFF, NYLON 0.50" TALL KEYSTONE, 8833 (SNAP ON)
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DEMO MANUAL DC1477A
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 representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
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DEMO MANUAL DC1477A
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2011
LT 0211 • 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 applica-tion engineer.
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