Datasheet

LTC2911
17
2911f
48V Telecom UV/OV Monitor with Hysteresis
LTC2911-1
V1 V2
ADJ
OV
2911 TA04
5V
UV
5.6V
M1
R
PU1
10k
R
CC
27k
0.25W
0.1µF
16V
RST
PFO
TMR
PFI
GND
R3
13.7k
M1: FDG6301N OR SIMILAR
V
UV(RISING)
= 43.3V
V
UV(FALLING)
= 38.7V
V
OV(RISING)
= 70.8V
V
OV(FALLING)
= 68.8V
R4
1.87M
R1
18.7k
R2B
169k
R2A
1.43M
V
IN
36V TO 72V
TYPICAL APPLICATIONS
4-Cell NiMH Stack Voltage Monitor with Input Overvoltage Signaling
LTC2911-2
V1 V2
ADJ
OV
t
RST
= 200ms
0.1µF
2911 TA05
LOBAT
RST
PFO
TMR
PFI
GND
R3
102k
BATTERY LOW RESET THRESHOLD = 3.38V
OVERVOLTAGE TRIP THRESHOLD = 6.47V
OVERVOLTAGE RECOVER THRESHOLD = 6.28V
R4
1.18M
R1
100k
R2
576k
1.2V
1N5817
1.2V
1.2V
1.2V
FROM
CHARGER
+
+
+
+
4-Cell Alkaline Stack Voltage Monitor with Early Power-Fail Warning
LTC2911-2
V1 V2
ADJ
LOBAT
0.1µF
t
RST
= 200ms
2911 TA06
RESET
RST
PFO
TMR
PFI
GND
R
A
100k
POWER-FAIL FALLING THRESHOLD = 3.90V
POWER-FAIL RISING THRESHOLD = 4.02V
RESET THRESHOLD = 3.39V
R
C
665k
R
B
15k
1.5V
1.5V
1.5V
1.5V
+
+
+
+