Texas Instruments EVMK2G, User Manual, Page: 17 / 83

Condition LED Status(LD14)
VINPUT between 11 to 13V
&
Current below 5A
ON
OFF
RED
VINPUT above 13V or below 11V
&
Current above 5A
PGD
DGND
VINPUT
VINPUT
DGND
R925
100 K
LD14
598-8110-107F
1 2
R924
10 K
D18
BZT52C13S
2
1
R923
10 K Q19
BSS138
3
1
2
Copyright © 2016, Texas Instruments Incorporated
Note:-
Vinput nominal = 12V
I input max = 5A
RED
Condition
ON Reverse Voltage
LED Status(LD15)
PGD
GATE
GATE
DGND DGND
DGND
DGND DGND DGND DGND DGND
VCC12V0_DC_IN
DGND
VINPUT
VINPUT
DGND
DGND DGND
VCC12V0_DC_IN VINPUT
DGND
+
C
2
3
1
0
0
u
F
_
3
5
V
R922
100K
+
C825
22uF_100V
U149
LM5060MM
SENSE
1
V
IN
2
OVP
3
UVLO
4
EN
5
GN
D
6
TIMER
7
NPGD
8
OUT
9
GATE
10
R918
261K_1%
D19
S1G-13-F
2
1
R917
5.62k_1%
LD15
598-8110-107F
1
2
J50
HDR_2X1
1
2
R892
0E
R919
237K_1%
R926
10K
LD9
598-8170-107F
1
2
C827
0.01uF
DNI
F2
5A
1 2
D17
SMCJ64CA
2
1
R920
47K _1%
C826
0.1uF
R30
1K
D3
B540C-13-F
2 1
R921
47K _1%
Q20 SUM60N10-17-E3
4
1
3
C824
0.1uF
C2
22uF
J3
CON_PWRJACK3_RAPC722
1
2
3
SW1
500ASSP3M2QE
1
2
3
Copyright © 2016, Texas Instruments Incorporated
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System Description
17 SPRUI65A – April 2016 – Revised January 2018
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K2G General Purpose Evaluation Module (EVMK2G)
3.3 Over Voltage Protection Circuit
The Voltage Protection Circuit on the EVMK2G protects the board from over voltage, under voltage,
transient voltage, and reverse voltage input cases. The safe operation input voltage range is 11v to 13v.
Any voltage not in this range is considered a fault and the voltage protection circuit (
Figure 4 ) isolates the
board from this input. LED LD14 ( Figure 5 ) indicates if the DC input applied to board is in a safe input
range.
Figure 4. Over Voltage Protection Circuit
Figure 5. Fault Indication Circuit