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Texas Instruments LM2796, User Manual, Page: 5 / 6

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Texas Instruments LM2796 User Manual Download Page 5

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LM2796 Evaluation Board Layout

4

LM2796 Evaluation Board Layout

Figure 3. Top Layer

Figure 4. Bottom Layer (top view, unmirrored)

5

SNVA086A – May 2004 – Revised April 2013

AN-1321 LM2796 Evaluation Board

Submit Documentation Feedback

Copyright © 2004–2013, Texas Instruments Incorporated

Summary of Contents for LM2796

Page 1: ...e used to enable disable the LM2796 and or the LED output currents The connections to the ENx pins provided by these posts can also be used to connect pulse width modulated PWM signals to the LM2796 in order to adjust the average brightness of the LEDs On each of these header strips the post labeled is connected to VIN The post labeled is connected to GND The middle post connects to EN ENA and ENB...

Page 2: ...By placing a current meter between the two header pins as shown on the following page in Figure 1 the sum total of all LED currents can be measured With the LEDS_ON jumper removed the current of an individual output can be measured by placing a current meter between a Dxx header and GND as shown in Figure 2 With such a connection the voltage on pin Dxx will be almost 0V because the series resistan...

Page 3: ... Series LED or Resistor Optional to Set VDxx 3 6V VD3B VLEDm I ID3B LEDM www ti com Board Operation Figure 2 Measuring Current of All Individual Dxx Outputs by Removing the LEDS_ON Jumper and Placing Current Meters Between the Dxx Pins and GND 3 SNVA086A May 2004 Revised April 2013 AN 1321 LM2796 Evaluation Board Submit Documentation Feedback Copyright 2004 2013 Texas Instruments Incorporated ...

Page 4: ...Symbol U S Metric mm Characteristic LM2796 YZR0018 2 1 x 2 4 x 0 6 Texas LM2796 DSBGA Instruments Cin Cout 2 2µF 6 3V 0603 1608 1 6 x 0 8 x 0 8 X5R TDK C1608X5R0J225K C1 C2 1µF 10V 0603 1608 1 6 x 0 8 x 0 8 X5R TDK C1608X5R1A105K Dxx White LEDs 1 5 x 2 3 x 1 4 OSRAM LWM67C T1U1 3C5D Rset 8 3kΩ 0603 1608 1 6 x 0 8 x 0 8 Vishay Dale CRCW06048251F Rset optional 4 AN 1321 LM2796 Evaluation Board SNVA0...

Page 5: ... LM2796 Evaluation Board Layout Figure 3 Top Layer Figure 4 Bottom Layer top view unmirrored 5 SNVA086A May 2004 Revised April 2013 AN 1321 LM2796 Evaluation Board Submit Documentation Feedback Copyright 2004 2013 Texas Instruments Incorporated ...

Page 6: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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