Texas Instruments Evaluation Board for the LM5051 LM5051MAEVAL/NOPB LM5051MAEVAL/NOPB 数据表
产品代码
LM5051MAEVAL/NOPB
User's Guide
SNVA483B – October 2011 – Revised May 2013
AN-2148 LM5051MAEVAL Evaluation Board
1
Introduction
The LM5051 evaluation board is designed to demonstrate the capabilities of the LM5051 OR-ing diode
controller. One low-side N-channel power MOSFET is used per channel. The LM5051 evaluation board
schematic is shown in
controller. One low-side N-channel power MOSFET is used per channel. The LM5051 evaluation board
schematic is shown in
. The evaluation board is designed to highlight applications with a small
solution size. For more information about LM5051 functional and electrical characteristics, see the
LM5051 Low Side OR-ing FET Controller Data Sheet (
LM5051 Low Side OR-ing FET Controller Data Sheet (
2
Operating Range
•
Input Voltage: 48V
•
Output Current Range: 0A to 5A
•
Ambient Temperature Range 0°C to 50°C
•
Board Size 2.25 inches x 2.60 inches
To aid in the demonstration and evaluation of low-side OR-ing diode controller solution based on the
LM5051.
LM5051.
The load current capability is limited at 5A by the ratings of the MOSFETs, the banana jacks, and the PCB
copper area and weight. The PCB layout has not been tested for currents above 5A, so this should only
be done with some degree of caution.
copper area and weight. The PCB layout has not been tested for currents above 5A, so this should only
be done with some degree of caution.
The maximum input voltage is limited by the breakdown voltage rating of the two input protection diodes
(D1,D2), and the breakdown voltage rating of the output protection diode (D4).
(D1,D2), and the breakdown voltage rating of the output protection diode (D4).
Typical evaluation board performance and characteristics curves are shown in
through
The PCB layout is shown in
and
. An on-board push-button switch invokes the FET test
mode on both channels simultaneously, while individual test points are provided for monitoring the FET
test status output.
test status output.
3
Evaluation Board Start-Up
Before applying power to the LM5051 evaluation board, all external connections should be verified. The
external power supplies must be turned off and connected with proper polarity to the INPUT A+/B+ and
INPUT A-/B- terminals. A common load is connected to the 48V+ OUT and 48V- OUT terminals.
external power supplies must be turned off and connected with proper polarity to the INPUT A+/B+ and
INPUT A-/B- terminals. A common load is connected to the 48V+ OUT and 48V- OUT terminals.
The evaluation board will be in the normal operating mode when power is applied.
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1
SNVA483B – October 2011 – Revised May 2013
AN-2148 LM5051MAEVAL Evaluation Board
Copyright © 2011–2013, Texas Instruments Incorporated