Rainbow Electronics MAX6661 - Manual (Page 6)

MAX6661
Remote Temperature-Controlled Fan-Speed
Regulator with SPI-Compatible Interface
6 _______________________________________________________________________________________
N
FAN
FAN
TACH IN
VFAN
FAN-SPEED
REGULATOR
MUX DXP
DXN
T HIGH
T
LOW
CONFIGURATION
FAN TACHOMETER
DIVISOR (FTD)
FAN TACHOMETER
PERIOD (FTP)
FULL SCALE
(FS)
FAN GAIN (FG)
T FAN (FT)
FAN-CONVERSION
RATE (FCR)
MODE (M)
FAN TACHOMETER
PERIOD LIMIT (FTPL)
FAN-SPEED CONTROL
(FSC)
STATUS
T HYST COMPARAT0R
T
MAX
THERMAL OPEN/
CLOSE LOOP
FAN OPEN/
CLOSE LOOP
FAN
CONTROL
CIRCUIT
REMOTE
TEMPERATURE
DATA
REGISTERS
SC
SDIN
DOUT
CS
ADC
CONTROL
LOGIC
SPI
INTERFACE
OVERT
ALERT
Figure 1. MAX6661 Block Diagram