TC647EOA Microchip Technology, TC647EOA Datasheet - Page 6

• Manufacturer Part Number: TC647EOA
• Description: IC PWM FAN SPEED CTRLR 8-SOIC
• Manufacturer: Microchip Technology
• Type: Controller - PWM Fanr

Specifications of TC647EOA

• Applications: Fan Controller, Brushless (BLDC)
• Number Of Outputs: 1
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Motor Type: PWM
• No. Of Outputs: 1
• Output Current: 5mA
• Output Voltage: 4.4V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 3 V to 5.5 V
• Supply Current: 1 mA
• Mounting Style: SMD/SMT
• 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

TC647
Continuous restart mode is enabled by connecting the
FAULT output to V
shown in Figure 3-1. When so connected, the TC647
automatically attempts to restart the fan whenever a
fault condition occurs. When the FAULT output is
driven low, the V
V
FIGURE 3-1:
DS21447C-page 6
SHDN
Shutdown
Controller
Note: The parallel combination of R 3 and R 4 must be >10 k .
, initiating a reset and clearing the fault
System
From
MIN
(Optional)
MIN
R
input is momentarily pulled below
1
Fan Fault Output Circuit.
through a 0.1 µF capacitor, as
Q
2
+5V
0.01µF
From
Temp
Sensor
R
C
R
4
1
3
C
0.01 µF
B
C
1 µF
F
3
2
1
V
V
C
IN
MIN
F
+5V
8
V
TC647
DD
GND
condition. Normal fan start-up is then attempted as pre-
viously described. The FAULT output may be
connected to external logic (or the interrupt input of a
microcontroller) to shut the TC647 down if multiple fault
pulses are detected at approximately one second
intervals.
4
C
1µF
B
FAULT
SENSE
V
OUT
6
7
5
+5V
C
10 k
1 kΩ
SENSE
2002 Microchip Technology Inc.
Detected
1
0
Fault
TC647
RESET
R
SENSE
R
BASE
+12V
Fan
Q
1