Datasheet

LTC2997
14
2997fa
Figure 14. Temperature Proportional PWM Fan Speed Controller
TYPICAL APPLICATIONS
D
+
D
–
LTC2997
V
CC
V
REF
V
PTAT
GND
2997 F14
10k
–
+
LTC6078
470pF
MMBT 3904
39k
390k
68k
0.1µF
5V
MOD
SET
LTC6692
V
CC
OUT
B6015L12F
IRF3708
12V
DIV
GND
FAN
Figure 13. Remote Diode Sensor Insensitive to Cable Connection Polarity
V
REF
2.5V TO 5.5V
D
+
D
–
LTC2997
470pF
MMBT3904
2997 F13
V
CC
V
PTAT
GND
0.1µF
4mV/K
1.8V