Datasheet

LTC2991
25
2991fd
For more information www.linear.com/LTC2991
Typical applicaTions
Large Motor Protection/Regulation
Fan/Air Filter/Temperature Alarm
V
CC
V1
LTC2991
LOAD
PWR
= I • V
0.01Ω
1W, 1%
MOTOR CONTROL VOLTAGE
0V TO 40V
0A TO 10A
2-WIRE I
2
C
INTERFACE
5V
71.5k
1%
71.5k
1%
10.2k
1%
10.2k
1%
GND
T
MOTOR
MMBT3904
SDA
SCL
ADR0
ADR1
ADR2
V3
V4
V2
2991 TA05
MOTOR
T
AMBIENT
VOLTAGE, CURRENT AND TEMPERATURE CONFIGURATION:
CONTROL REGISTER 06: 0xA1
T
AMBIENT
REG 1A, 1B: 0.0625°C/LSB
V
MOTOR
REG 0A, 0B: 2.44mV/LSB
I
MOTOR
REG 0C, 0D: 15.54mA/LSB
T
MOTOR
REG 0E, 0F: 0.0625°C/LSB
V
CC
REG 1C, 1D: 2.5V + 305.18µV/LSB
OTHER APPS
V5 TO V8
4
V
CC
V1
LTC2991
2-WIRE I
2
C
INTERFACE
3.3V
GND
22Ω
0.125W
HEATER
NDS351AN
TEMPERATURE FOR:
HEATER ENABLE
GOOD FAN
BAD FAN
FAN
MMBT3904
MMBT3904
SDA
SCL
ADR0
ADR1
V3
V4
V2
2991 TA06
T
AMBIENT
HEATER ENABLE
2 SECOND PULSE
CONTROL REGISTER 0x06 = 0xAA
T
AMBIENT
REG 1A, 1B: 0.0625°C/LSB
T
FAN1
REG 0A, 0B: 0.0625°C/LSB
T
FAN2
REG 0C, 0D: 0.0625°C/LSB
V
CC
REG 1C, 1D: 2.5V + 305.18µV/LSB
3.3V
22Ω
0.125W
FAN
OTHER APPS
V5 TO V8
4