Recent Changes

{1.jpg} Figure 6: Zoomed in View of Prototype
{2.jpg} Figure 7: Large View of the Prototype
Why we selected the Instruments for the VI:
The equipment that we are using for our final project consists of the Agilent DC power supply, the Agilent multimeter, and the Fluke multimeter. The Agilent multimeter will measure the current and the Fluke multimeter will measure voltages. The reason the Agilent multimeter will be used to be measure the current as opposed to having the Fluke do it is because the Agilent has higher current capabilities than the Fluke does. Since this project is a DC based project, there is no need to use an oscilloscope. The goal of this project is to measure input power, output power and efficiency. Since this is the case, just measuring voltages and currents is all that is needed.
When developing and testing the system, writing the VI’s to ensure that the unit was capable of collecting data was first. After the unit properly acquired data from the instruments, calculations were programmed into the VI for input power, output power and efficiency. The VI was then programmed to output the raw data to a text file.
How does the Test Suite Work:
The test suite takes a starting input voltage, stopping input voltage, a voltage input step, and power supply current limit. After the values are inputted into the VI, the system will calculate input power, output power, and efficiency. It will also graph these values for the user to see. It then programs the instruments to the starting voltage and collects the data for that input voltage. After it completes one iteration, the input voltage increases by the step input and repeats the tests again.

Heat Sink Design Help: http://sound.westhost.com/heatsinks.htm#2
Buying Heat Sinks: http://www.aavidthermalloy.com/products/dctodc/dcdc_Half.shtml
LTM4607 - Simulation Model: http://www.linear.com/pc/productDetail.jsp?navId=H0,C1,C1003,C1424,P39462

Schematic:
{schem.jpg} Figure1: Schematic of our Project
using LTM4607: {http://www.wikispaces.com/i/c.gif} Insert Link
Circuit Used for Simulation (Downloaded from Linear Technology - Simulation Models for LTM4607- Link to model)
{SImulation_cir.JPG} Figure 2. Circuit used for Simulation

Schematic:
{schem.jpg} Figure1: Schematic of our Project
using LTM4607: {http://www.wikispaces.com/i/c.gif} Insert Link
Circuit Used for Simulation (Downloaded from Linear Technology - Simulation Models for LTM4607- Link to model)
{SImulation_cir.JPG} Figure 2. Circuit used for Simulation
Input Deck - Netlist for Simulation

How does the Test Suite Work:
The test suite takes a starting input voltage, stopping input voltage, a voltage input step, and power supply current limit. After the values are inputted into the VI, the system will calculate input power, output power, and efficiency. It will also graph these values for the user to see. It then programs the instruments to the starting voltage and collects the data for that input voltage. After it completes one iteration, the input voltage increases by the step input and repeats the tests again.
Here's the LabView Library for this project:
{Project_3.llb}
LabView:
Main VI

Circuit Used for Simulation
{SImulation_cir.JPG} Figure 2. Circuit used for Simulation
Input Deck - Netlist for Simulation
This simulation was created by Chris Henry and Henry Ung for Project 3 of EE413.
L1 N001 N002 3.3µ Rser=1m
R1 N004 0 7.5m
R2 0 N008 6.153K
V1 IN 0 5
C1 N010 0 .01µ
R3 N006 N005 100K
C2 IN 0 150µ Rser=35m
C3 IN 0 10µ Rser=20m
C4 OUT 0 180µ Rser=32m x2
R4 N005 N009 4.64K
R5 N009 0 1.21K
R6 IN N003 51K
D1 0 N003 1N750
C5 OUT 0 22µ Rser=5m x2
XU1 N008 OUT 0 N001 IN N002 N004 N004 0 N006 N005 N009 N003 N010 N003 N007 NC_01 0 0 NC_02 LTM4607
Rload OUT 0 10
.model D D
.lib C:\PROGRA~1\LTC\LTSPIC~1\lib\cmp\standard.dio
.tran 10m startup
LTM4607 - 36 VIN, 24 VOUT Buck-Boost DC/DC uModule\nInput: 5V-20V Output: 13.8V @ 1.38A
Note:\n If the simulation model is not found please update with the "Sync Release" command from the "Tools" menu.\n It remains the customer's responsibility to verify proper and reliable operation in the actual application.\n Component substitution and printed circuit board layout may significantly affect circuit performance or reliability\n Contact your local sales representative for assistance. This circuit is distributed to customers only for use with LTC parts\n Copyright © 2008 Linear Technology Inc. All rights reserved.
.lib LTM4607.sub
.backanno
.end
5V Input - With a 10Ohm Load
{5v-Input2.JPG} Figure 3. Output of Simulation with 5V Input

{SImulation_cir.JPG} Figure 2. Circuit used for Simulation
5V Input - With a 10Ohm Load
{5v-Input.JPG}{5v-Input2.JPG} Figure 3.
10V Input - With a 10Ohm Load
{10V-Input.JPG}{10V-Input2.JPG} Figure 4.
20V Input - With a 10 Ohm Load
{20V-Input.JPG}{20V-Input2.JPG} Figure 5. Simulation with 10V20V Input
Pictures of the Prototype:
{1.jpg} Figure 6: Zoomed in View of Prototype