LT1637 Linear Technology, LT1637 Datasheet - Page 10

• Manufacturer Part Number: LT1637
• Description: 1.1MHz/ 0.4V/us Over-The-Top Micropower/ Rail-To-Rail Input and Output Op Amp
• Manufacturer: Linear Technology

LT1637
SI PLIFIED
10
TYPICAL APPLICATIO S
LOAD
V
W
+
0.2
200
200
Positive Supply Rail Current Sense
SHDN
(0V TO 44V)
(0V TO 44V)
5
Q3
I
LOAD
R1
1M
Over-The-Top Comparator with Hysteresis
Q4
IN1
IN2
V
Q5
OUT
HYSTERESIS =
+
–
LT1637
= (2 )(I
10 A
10k
10k
5V
SCHE ATIC
Q6
LOAD
R2
6k
V
100
Q7
)
CC
+
–
Q1
Q2
3V TO 44V
LT1637
1M
W
– IN
+ IN
Q1
2N3904
2k
1637 TA02
1M
2
3
2N5087
2N5210
Q8
0V TO 4.3V
U
1.3k
1.3k
R3
R4
1637 TA04
D4
1M
V
IN
Capacitive Loads Greater Than 200pF
Q11
D5
1M
Optional Output Compensation for
Q9
V
OUT
D1
+
–
Q10
LT1637
Q12
D2
Q14
NULL
Q15
Q13
150
1637 TA03
0.22 F
1
0.1V TO 44V
Q16
C
LOAD
L
R5
7k
R7
400
R
0.2
4700pF
S
200
I
LOAD
R1
Over-The-Top Current Sense
Q17
R6
7k
R8
400
I
ON/OFF
LOAD
LAMP
Q18
–
8
+
=
D3
LT1637
(R
NULL
5V TO 44V
S
V
)(R2/R1)
5V
OUT
Q19
Q20
Lamp Outage Detector
100k
0.5
5k
Q21
Q22
Q1
2N3904
Q23
OUT = 0V FOR GOOD BULB
R2
2k
1637 TA06
1M
–
+
LT1637
V
(0V TO 4.3V)
Q24
OUT
3V FOR OPEN BULB
3V
1637 SS
Q26
Q25
7 V
6 OUT
4 V
+
–
1637 TA05
OUT