Datasheet

LT6108-1/LT6108-2
23
610812fa
APPLICATIONS INFORMATION
TYPICAL APPLICATIONS
MCU Interfacing with Hardware Interrupts
SENSEHI SENSELO
OUTA
0.1Ω
V
+
100Ω
LT6108-1
V
–
TO LOAD
V
OUT
ADC IN
8.66k
1.33k
INC
V
+
EN/RST
OUTC
6
1
5
4
8
7
2
3
RESET
6108 TA03
10k
5V
V
OUT
/ADC IN
AtMega1280
PB0
PB1
PCINT2
PCINT3
ADC2
PB5
5
6
7
2
3
1
OVERCURRENT ROUTINE
RESET COMPARATOR
MCU INTERUPT
OUTC GOES LOW
5V
0V
610812 TA03b
Example:
The comparator is set to have a 300mA overcurrent
threshold. The MCU will receive the comparator output as
a hardware interrupt and immediately run an appropriate
fault routine.
Overcurrent Battery Fault Protection
SENSEHI SENSELO
OUTA
0.1Ω
R10
100Ω
LT6108-1
V
–
TO LOAD
V
OUT
9.53k
475Ω
0.8A
OVERCURRENT
DETECTION
INC
V
+
EN/RST
6
1
5
4
OUTC
8
7
10k
100k
6.2V*
IRF9640
2
5V
3
RESET
610812 TA02
100k
2N7000
*CMH25234B
+
+
+
+
10µF
12 LITHIUM
40V CELL STACK
differentially across R1 and R2. The comparator output
low voltage will also be shifted up by V
D
. The EN/RST pin
threshold is referenced to the V
–
pin. In order to provide
valid input levels to the LT6108 and avoid driving EN/RST
below V
–
the negative supply of the driving circuit should
be tied to V
–
of the LT6108.