TC642EUA713 Microchip Technology, TC642EUA713 Datasheet - Page 15
![IC PWM FAN SPEED CONTRLR 8-MSOP](/photos/6/59/65932/mfg_150_c04-111_ms_8-msop_sml.jpg)
TC642EUA713
Manufacturer Part Number
TC642EUA713
Description
IC PWM FAN SPEED CONTRLR 8-MSOP
Manufacturer
Microchip Technology
Type
Controller - PWM Fanr
Datasheet
1.TC642EUA.pdf
(28 pages)
Specifications of TC642EUA713
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-MSOP, Micro8™, 8-uMAX, 8-uSOP,
Product
Fan / Motor Controllers / Drivers
Operating Supply Voltage
6 V
Supply Current
1 mA
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC642EUA713
Manufacturer:
MICROCHIP
Quantity:
12 000
5.7
Noise present on the V
erroneous operation of the FAULT output. As a result,
these inputs should be bypassed with a 0.01 F
capacitor mounted as close to the package as is possi-
ble. This is particularly true of V
driven from a high impedance source (such as a ther-
mistor). In addition, the V
with a 1 µF capacitor. Grounds should be kept as short
as possible. To keep fan noise off the TC642 ground
pin, individual ground returns for the TC642 and the low
side of the fan current sense resistor should be used.
FIGURE 5-9:
2002 Microchip Technology Inc.
Shutdown
Fan
Power Supply Routing and
Bypassing
(Optional)
10 k
R
8
Design Example.
IN
DD
and V
input should be bypassed
+5V
Q
2
MIN
20.5 k
3.83 k
IN
+5V
R
R
, which is usually
1
2
inputs may cause
R
18 k
R5
33 k
6
C
0.01 F
C
0.01 µF
@ 25˚C
10 k
B
B
C
1 F
NTC
1
1
3
2
C
V
V
1 F
F
MIN
IN
C
B
+
+5V
V
DD
TC642
8
Design Example
Step 1. Calculate R
Step 2. Set minimum fan speed V
Step 3. Design the output circuit.
GND
4
having a resistance of 10 k
and 4.65 k
R
Q
R
SENSE
R
Limit the divider current to 100 µA from which
R
Maximum fan motor current = 250 mA.
FAULT
V
2
7
1
1
5
OUT
= 3.83 k
= 800 .
= 20.5 k
= 33 k
beta is chosen at 50 from which
6
7
5
1
and R
Thermal Fault
at T
and R
C
0.1 F
Fan/
MAX
SENSE
6
2
= 18 k
based on using an NTC
(45°C) (see Figure 5-9).
MIN
DS21444C-page 15
800
TC642
R
= 1.8V.
7
at T
+12V
Fan
MIN
Q
R
1
SENSE
2.2
(25°C)