Rainbow-electronics MAX6661 Manual de usuario descargar pdf (Pagina 6)

MAX6661

Remote Temperature-Controlled Fan-Speed

Regulator with SPI-Compatible Interface

6 _______________________________________________________________________________________

FAN

TACH IN

VFAN

FAN-SPEED

REGULATOR

MUXDXP

DXN

HIGH

LOW

CONFIGURATION

FAN TACHOMETER

DIVISOR (FTD)

FAN TACHOMETER

PERIOD (FTP)

FULL SCALE

(FS)

FAN GAIN (FG)

FAN

(FT)

FAN-CONVERSION

RATE (FCR)

MODE (M)

FAN TACHOMETER

PERIOD LIMIT (FTPL)

FAN-SPEED CONTROL

(FSC)

STATUS

HYST

COMPARAT0R

MAX

THERMAL OPEN/

CLOSE LOOP

FAN OPEN/

CLOSE LOOP

FAN

CONTROL

CIRCUIT

REMOTE

TEMPERATURE

DATA

REGISTERS

SDIN

DOUT

ADC

CONTROL

LOGIC

SPI

INTERFACE

OVERT

ALERT

Figure 1. MAX6661 Block Diagram

1 2 3 4 5 6 7 8 9 10 11 ... 18 19

General Description 1
Applications 1
Features 1
Ordering Information 1
Typical Operating Circuit 1
ABSOLUTE MAXIMUM RATINGS 2
ELECTRICAL CHARACTERISTICS 2
Detailed Description 5
Pin Description 5
Thermal Mass and Self-Heating 7
ADC Noise Filtering 7
PC Board Layout 7
PC Board Layout Checklist 8
Low-Power Standby Mode 8
SPI Interface 8
Alarm Threshold Registers 9
Figure 3. Read Cycle 10
Figure 4. Write Cycle 10
(Two’s Complement) 11
Fan Control 13
Thermal Loop 13
POR and UVLO 13
Fan Loop 14
Applications Information 16
Chip Information 18
Package Information 19
Pin Configuration 19

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Rainbow-electronics MAX6661 Manual de usuario Pagina 6

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