TC654EUN Microchip Technology, TC654EUN Datasheet - Page 18

• Manufacturer Part Number: TC654EUN
• Description: IC PWM FAN SPEED CTRLR 10-MSOP
• Manufacturer: Microchip Technology
• Type: High Speed PWM Controllerr

Specifications of TC654EUN

• Number Of Outputs: 1
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Applications: Fan Controller, Brushless (BLDC)
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Output Current: 5 mA (Min)
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Motor Type: PWM
• No. Of Outputs: 1
• Output Voltage: 4.4V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: MSOP
• No. Of Pins: 10
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TC654/TC655
6.2
The Fan Fault Threshold Registers (FAN_FAULT1 and
FAN_ FAULT2) are used to set the fan fault threshold
levels for fan 1 and fan 2, respectively. The Fan Fault
Registers are 8-bit, read/writable registers that allow
the fan fault RPM threshold to be set in 50 RPM incre-
ments. The default setting for both Fan Fault registers
is 500 RPM (0000 1010). The maximum set point
value is 12750 RPM. If the measured fan RPM (stored
REGISTER 6-2:
DS21734A-page 18
D(7)
0
0
0
1
1
.
.
FAN_FAULT1 & FAN_FAULT2
Threshold Registers
(FAN_FAULT1 & FAN_ FAULT2)
D(6)
0
0
0
1
1
.
.
FAN FAULT THRESHOLD REGISTERS (FAN_FAULT1 & FAN_FAULT2)
D(5)
0
0
0
1
1
.
.
D(4)
0
0
0
1
1
.
.
D(3)
0
0
0
1
1
.
.
in RPM1 and RPM2 Registers) drops below the value
that is set in the Fan Fault Registers for more than
2.4sec, a fan fault indication will be given. F1F (bit
0<0>) and F2F (bit 1<0>) in the Status Register indi-
cate fan fault conditions for fan 1 and fan 2, respec-
tively. The FAULT output will also be pulled low in a fan
fault condition. Changing FFCLR (bit 7<0>) in the Con-
figuration Register will reset the fan fault bits in the Sta-
tus Register as well as the FAULT output. See
Register 6-2 for the Fan Fault Threshold Register 8-bit
format.
D(2)
0
0
0
1
1
.
.
D(1)
0
0
1
1
1
.
.
2002 Microchip Technology Inc.
D(0)
0
0
0
0
1
.
.
12700
12750
RPM
100
50
0