Texas Instruments LM5001 High Voltage Switch Mode Regulator, EVM LM5001ISOEVAL/NOPB LM5001ISOEVAL/NOPB Datenbogen
Produktcode
LM5001ISOEVAL/NOPB
L
M
5
0
0
1
VIN
RT
EN
GND
SW
FB
COMP
VCC
V
IN
= 16V
±
42V
V
OUT
= +5V
I
OUT
= 1A
T1
L
PRI
= 160
é
H
8:3:2
C1
2.2
é
F
VCC
VCC
C12
100
é
F
D1
D4
R3
6.04k
R4
52.3k
52.3k
LM431
R16
4.99k
C16
0.1
P
F
C6
1
é
F
C9
1
1
é
F
R19
2.20k
2.20k
R18
2.20k
2.20k
R8
249
249
R13
49.9
R15
10k
C15
2.2
é
F
R14
560
J1
J2
ENABLE
SYNC
GND
GND
IGND
R1
60.4k
R2
10
C3
0.1
0.1
é
F
U1
U2
U3
R6
8.06k
C7
0.01
é
F
R5
20
C5
100 pF
R10
0
C8
10
10
é
F
R7
100k
100k
D3
OPTIONAL
SOFT-START
D2
C2
2.2
é
F
C19
2200 pF
2kV
J5
J8
R17
0
0
C14
1
1
é
F
J3
J4
R12
10
C11
470 pF
C4
0.01
0.01
é
F
J6
J7
1
2
3
4
5
6
7
8
1
2
3
4
2
3
4
5
6,7
8,9
Evaluation Board Schematic
2
Evaluation Board Schematic
3
Powering and Loading Considerations
Read this entire page prior to attempting to power the evaluation board.
3.1
Quick Setup Procedure
Step 1: Set the input source current limit to 1A. Turn off the input source. Connect the positive output of
the input source to J1 and the negative output to J2.
the input source to J1 and the negative output to J2.
Step 2: Connect the load, with 1A capability, to J3 for the positive connection and J4 for the negative
connection.
connection.
Step 3: The ENABLE pin, J7, should be left open for normal operation.
Step 4: Set the input source voltage to 28V and the load to 0.1A. The load voltage should be in regulation
with a nominal 5V output.
with a nominal 5V output.
Step 5: Slowly increase the load while monitoring the load voltage at J3 and J4. It should remain in
regulation with a nominal 5V output as the load is increased up to 1 Amp.
regulation with a nominal 5V output as the load is increased up to 1 Amp.
Step 6: Slowly sweep the input source voltage from 16V to 42V. The load voltage should remain in
regulation with a nominal 5V output.
regulation with a nominal 5V output.
Step 7: Temporally short the ENABLE pin (J7) to GND (J5) to check the shutdown function.
Step 8: Increase the load beyond the normal range to check current limiting while the input source is set
to 28V. The output current should limit at approximately 1.9A. The input source current limit should be
increased for this step. Fan cooling is critical during this step.
to 28V. The output current should limit at approximately 1.9A. The input source current limit should be
increased for this step. Fan cooling is critical during this step.
2
AN-1588 LM5001 Evaluation Board
SNVA221B – February 2007 – Revised April 2013
Copyright © 2007–2013, Texas Instruments Incorporated