MAX6620ATI+ Maxim Integrated Products, MAX6620ATI+ Datasheet - Page 26

• Manufacturer Part Number: MAX6620ATI+
• Description: IC QUAD LIN FAN-SPD CTRLR 28TQFN
• Manufacturer: Maxim Integrated Products

Specifications of MAX6620ATI+

• Applications: Fan Controller
• Number Of Outputs: 4
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-TQFN Exposed Pad
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Quad Linear Fan-Speed Controller
Figure 7. Using Low Dropout Voltage Regulators Instead of Discrete Transistors as the Pass Devices
26
______________________________________________________________________________________
TO I
(OPTIONAL CRYSTAL)
2
C MASTER
V
CC
SPINUP_START
DAC_START
WD_START
FAN_FAIL
ADDR
SDA
SCL
X1
X2
3.0V TO 5.5V
REGISTERS, AND
CONTROL LOGIC
V
I
2
CC
C INTERFACE,
0.1μF
V
+12V
FAN
TACH MONITOR
0.1μF
DAC OUTPUT
DRIVER
DACOUT1
DACFB1
TACH1
DACOUT2
DACFB2
TACH2
DACOUT3
DACFB3
TACH3
DACOUT4
DACFB4
TACH4
V
V
V
V
FAN
FAN
FAN
FAN
470Ω
470Ω
470Ω
470Ω
V
V
V
V
C
C
C
C
PQ20RX
PQ20RX
PQ20RX
PQ20RX
V
V
V
V
V
+12V
IN
V
IN
V
IN
V
IN
FAN
FAN
FAN
FAN
V
V
V
V
ADJ
ADJ
ADJ
ADJ
V
V
V
V
O
O
O
O
2.4kΩ
27kΩ
2.4kΩ
27kΩ
2.4kΩ
27kΩ
2.4kΩ
27kΩ
0.33μF
0.33μF
0.33μF
0.33μF
FAN1
FAN2
FAN3
FAN3
47μF
47μF
47μF
47μF