Datasheet

LT6109-1/LT6109-2
22
610912fa
APPLICATIONS INFORMATIONAPPLICATIONS INFORMATION
–
+
V
+
V
+
V
–
INC
V
–
5
V
D
+
–
V
OUTA
+
–
610912 F17
OUTA 8
9
6
V
+
V
+
SENSEHI
LT6109-1
R
IN
R
SENSE
I
LOAD
V
DD
V
DD
SENSELO
OUTC4
EN/RST
2
1
10
400mV
REFERENCE
R3
R1
R2
V
DD
–
+
Figure 17. Schottky Prevents Damage During Supply Reversal
TYPICAL APPLICATIONS
Overcurrent and Undervoltage Battery Fault Protection
SENSEHI SENSELO
OUTA
0.1Ω
R10
100Ω
LT6109-1
V
–
TO
LOAD
V
OUT
9.53k
475Ω
30V
UNDERVOLTAGE
DETECTION
0.8A
OVERCURRENT
DETECTION
INC1
INC2
V
+
EN/RST
OUTC2
8
1
6
7
5
OUTC1
10
9
10k
100k
6.2V*
IRF9640
2
5V
INC2
3
4
RESET
6109 TA02
100k
2N7000
*CMH25234B
1M
13.3k
+
+
+
+
0.1µF
10µF
12 LITHIUM
40V CELL STACK
The comparators monitor for overcurrent and undervolt-
age conditions. If either fault condition is detected the
battery will immediately be disconnected from the load.
The latching comparator outputs ensure the battery stays
disconnected from the load until an outside source resets
the LT6109 comparator outputs.