Texas Instruments LM25069MM-2EVAL - Evaluation Board LM25069MM-2EVAL/NOPB LM25069MM-2EVAL/NOPB 데이터 시트
제품 코드
LM25069MM-2EVAL/NOPB
S
W
1
J 1
ON
OFF
TP1
1
P1
JMP2
1
C3
C4
+
+
R2
R4
R1
R10
U1
R
3
C
8
R9
R7
C5
R8
C1
Q1
C
6
J2
Z1
LM25069 EVALUATION BD.
C2008
S/N
HOT SWAP CIRCUIT
J
M
P
1
551600160-001 REV A
BACKPLANE
VI
N
G
N
D
O
U
T
G
N
D
PG
O
O
D
+ C7
User's Guide
SNVA388D – February 2009 – Revised May 2013
AN-1947 LM25069 Evaluation Board
1
Introduction
The LM25069EVAL evaluation board provides the design engineer with a fully functional hot swap
controller board designed for positive voltage systems. This board contains an LM25069-2, the auto
restart version of this IC. This application note describes the various functions of the board, how to test
and evaluate it, and how to change the components for a specific application. For more information please
review the LM25069 Positive Low Voltage Power Limiting Hot Swap Controller (
controller board designed for positive voltage systems. This board contains an LM25069-2, the auto
restart version of this IC. This application note describes the various functions of the board, how to test
and evaluate it, and how to change the components for a specific application. For more information please
review the LM25069 Positive Low Voltage Power Limiting Hot Swap Controller (
) data sheet.
The board’s specifications are:
•
Input voltage range: +2.9V to 17V
•
Current limit: 5 Amps, ±10%
•
Q1 Power limit: 15W
•
UVLO Thresholds: 4.8V and 4.5V
•
OVLO Thresholds: 15V and 14.6V
•
Insertion delay: 213 ms
•
Fault timeout period: 14.6 ms and 12.1 ms
•
Restart time: 1.8 seconds
•
Size: 4.0” x 1.38”
2
Board Configuration
Figure 1. Evaluation Board - Top Side
A pictorial of the LM25069 evaluation board is shown in
, and the schematic is shown in
The “BACKPLANE” section, at the left end of the board, represents the backplane voltage source. The
vertical dashed line is the boundary between the backplane voltage source and the hot swap circuit input.
In other words, it represents the edge connector in a card cage system. The toggle switch (SW1) provides
a means to “connect” and “disconnect” the hot swap circuit from the backplane voltage source. The
circuitry to the right of the vertical dashed line is the hot swap circuit. The system voltage is to be
connected to the input terminal block (J1). The external load is to be connected to the output terminal
block (J2). Capacitors C3 and C4 represent capacitance which is typically present on the input of the load
circuit, and are present on this evaluation board so the turn-on characteristics of the LM25069 may be
tested without having to connect a load.
vertical dashed line is the boundary between the backplane voltage source and the hot swap circuit input.
In other words, it represents the edge connector in a card cage system. The toggle switch (SW1) provides
a means to “connect” and “disconnect” the hot swap circuit from the backplane voltage source. The
circuitry to the right of the vertical dashed line is the hot swap circuit. The system voltage is to be
connected to the input terminal block (J1). The external load is to be connected to the output terminal
block (J2). Capacitors C3 and C4 represent capacitance which is typically present on the input of the load
circuit, and are present on this evaluation board so the turn-on characteristics of the LM25069 may be
tested without having to connect a load.
1
SNVA388D – February 2009 – Revised May 2013
AN-1947 LM25069 Evaluation Board
Copyright © 2009–2013, Texas Instruments Incorporated