TC647BEUA

更新时间:2024-12-03 13:10:50
品牌:MICROCHIP
描述:BRUSHLESS DC MOTOR CONTROLLER, PDSO8, PLASTIC, MSOP-8

TC647BEUA 概述

BRUSHLESS DC MOTOR CONTROLLER, PDSO8, PLASTIC, MSOP-8 电机驱动器 运动控制电子器件

TC647BEUA 规格参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:MSOP
包装说明:TSSOP, TSSOP8,.19针数:8
Reach Compliance Code:compliantECCN代码:EAR99
HTS代码:8542.39.00.01Factory Lead Time:16 weeks
风险等级:0.72模拟集成电路 - 其他类型:BRUSHLESS DC MOTOR CONTROLLER
JESD-30 代码:S-PDSO-G8JESD-609代码:e3
长度:3 mm湿度敏感等级:1
功能数量:1端子数量:8
最高工作温度:85 °C最低工作温度:-40 °C
封装主体材料:PLASTIC/EPOXY封装代码:TSSOP
封装等效代码:TSSOP8,.19封装形状:SQUARE
封装形式:SMALL OUTLINE, THIN PROFILE, SHRINK PITCH峰值回流温度(摄氏度):260
电源:3.3/5 V认证状态:Not Qualified
座面最大高度:1.1 mm子类别:Motion Control Electronics
最大供电电流 (Isup):0.4 mA最大供电电压 (Vsup):5.5 V
最小供电电压 (Vsup):3 V标称供电电压 (Vsup):5 V
表面贴装:YES温度等级:INDUSTRIAL
端子面层:Matte Tin (Sn)端子形式:GULL WING
端子节距:0.65 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:3 mm
Base Number Matches:1

TC647BEUA 数据手册

通过下载TC647BEUA数据手册来全面了解它。这个PDF文档包含了所有必要的细节,如产品概述、功能特性、引脚定义、引脚排列图等信息。

PDF下载
TC647  
M
PWM Fan Speed Controller with FanSenseTechnology  
Features  
Package Types  
SOIC/PDIP/MSOP  
Temperature Proportional Fan Speed for Acoustic  
Control and Longer Fan Life  
V
1
V
V
8
7
6
5
• Efficient PWM Fan Drive  
IN  
DD  
• 3.0V to 5.5V Supply Range:  
- Fan Voltage Independent of TC647  
Supply Voltage  
C
2
3
4
F
OUT  
TC647  
V
MIN  
FAULT  
SENSE  
- Supports any Fan Voltage  
GND  
• FanSense™ Technology Fault Detection Circuits  
Protect Against Fan Failure and Aid System  
Testing  
• Shutdown Mode for "Green" Systems  
• Supports Low Cost NTC/PTC Thermistors  
• Space Saving 8-Pin MSOP Package  
General Description  
The TC647 is a switch mode, fan speed controller for  
use with brushless DC fans. Temperature proportional  
speed control is accomplished using pulse width mod-  
ulation (PWM). A thermistor (or other voltage output  
Applications  
• Power Supplies  
• Personal Computers  
• File Servers  
Telecom Equipment  
• UPSs, Power Amps  
• General Purpose Fan Speed Control  
temperature sensor) connected to V furnishes the  
IN  
required control voltage of 1.25V to 2.65V (typical) for  
0% to 100% PWM duty cycle. Minimum fan speed is  
set by a simple resistor divider on the V  
input. An  
MIN  
integrated Start-up Timer ensures reliable motor start-  
up at turn-on, coming out of shutdown mode or  
following a transient fault. A logic low applied to V  
(Pin 3) causes fan shutdown.  
MIN  
The TC647 also features Microchip Technology's pro-  
prietary FanSense™ technology for increasing system  
reliability. In normal fan operation, a pulse train is  
present at SENSE (Pin 5). A missing pulse detector  
monitors this pin during fan operation. A stalled, open  
or unconnected fan causes the TC647 to trigger its  
Start-up Timer once. If the fault persists, the FAULT  
output goes low and the device is latched in its shut-  
down mode.  
Available Tools  
• Fan Controller Demonstration Board (TC642DEMO)  
• Fan Controller Evaluation Kit (TC642EV)  
The TC647 is available in the 8-pin plastic DIP, SOIC  
and MSOP packages and is available in the industrial  
and extended commercial temperature ranges.  
2002 Microchip Technology Inc.  
DS21447C-page 1  
TC647  
Functional Block Diagram  
V
IN  
V
DD  
+
SHDN  
+
Control  
Logic  
V
OUT  
C
F
3 x T  
Timer  
PWM  
Clock  
Generator  
FAULT  
Start-up  
Timer  
V
+
MIN  
V
SHDN  
Missing  
Pulse  
Detect.  
TC647  
+
10kΩ  
SENSE  
GND  
70mV (typ.)  
DS21447C-page 2  
2002 Microchip Technology Inc.  
TC647  
*Stresses above those listed under "Absolute Maximum Rat-  
ings" may cause permanent damage to the device. These are  
stress ratings only and functional operation of the device at  
these or any other conditions above those indicated in the  
operation sections of the specifications is not implied. Expo-  
sure to absolute maximum rating conditions for extended peri-  
ods may affect device reliability.  
1.0  
ELECTRICAL  
CHARACTERISTICS  
Absolute Maximum Ratings*  
Supply Voltage ......................................................... 6V  
Input Voltage, Any Pin.... (GND – 0.3V) to (V +0.3V)  
DD  
Package Thermal Resistance:  
PDIP (R ).............................................125°C/W  
θJA  
SOIC (R ) ............................................155°C/W  
θJA  
MSOP (R ) ..........................................200°C/W  
θJA  
Specified Temperature Range ........... -40°C to +125°C  
Storage Temperature Range.............. -65°C to +150°C  
DC ELECTRICAL SPECIFICATIONS  
Electrical Characteristics: Unless otherwise specified, TMIN < TA < TMAX, VDD = 3.0V to 5.5V.  
Symbol  
Parameter  
Supply Voltage  
Supply Current, Operating  
Min  
Typ  
Max  
Units  
Test Conditions  
VDD  
IDD  
3.0  
0.5  
5.5  
1
V
mA  
Pins 6, 7 Open,  
CF = 1 µF, VIN = VC(MAX)  
IDD(SHDN)  
Supply Current,  
Shutdown Mode  
VIN, VMIN Input Leakage  
25  
µA  
µA  
Pins 6, 7 Open,  
CF = 1 µF, VMIN = 0.35V  
IIN  
– 1.0  
+1.0  
Note 1  
VOUT Output  
tR  
tF  
tSHDN  
VOUT Rise Time  
VOUT Fall Time  
Pulse Width (On VMIN) to Clear  
Fault Mode  
30  
50  
50  
µsec  
µsec  
µsec  
IOH = 5 mA, Note 1  
IOL = 1 mA, Note 1  
VSHDN, VHYST  
Specifications, Note 1  
IOL  
IOH  
Sink Current at VOUT Output  
Source Current at VOUT Output  
1.0  
5.0  
mA  
mA  
VOL = 10% of VDD  
VOH = 80% of VDD  
VIN, VMIN Inputs  
VC(MAX)  
Input Voltage at VIN or VMIN for  
100% PWM Duty Cycle  
2.5  
2.65  
2.8  
V
VC(SPAN)  
VSHDN  
VC(MAX) - VC(MIN)  
Voltage Applied to VMIN to  
Ensure Shutdown Mode  
1.3  
1.4  
1.5  
VDD x 0.13  
V
V
VREL  
Voltage Applied to VMIN to  
Release Shutdown Mode  
VDD x 0.19  
V
VDD = 5V  
Pulse Width Modulator  
FPWM  
PWM Frequency  
26  
50  
30  
70  
34  
90  
Hz  
CF = 1.0 µF  
SENSE Input  
VTH(SENSE)  
SENSE Input Threshold  
Voltage with Respect to GND  
mV  
Note 1  
FAULT Output  
VOL  
tMP  
tSTARTUP  
tDIAG  
Output Low Voltage  
Missing Pulse Detector Timer  
Start-up Timer  
0.3  
V
IOL = 2.5 mA  
32/F  
32/F  
3/F  
Sec  
Sec  
Sec  
Diagnostic Timer  
Note 1: Ensured by design, not tested.  
2002 Microchip Technology Inc.  
DS21447C-page 3  
TC647  
2.3  
Analog Input (V  
)
2.0  
PIN DESCRIPTIONS  
MIN  
An external resistor divider connected to the V  
input  
The descriptions of the pins are listed in Table 2-1.  
MIN  
sets the minimum fan speed by fixing the minimum  
PWM duty cycle (1.25V to 2.65V = 0% to 100%, typi-  
TABLE 2-1:  
Pin No. Symbol  
PIN FUNCTION TABLE  
Description  
Analog Input  
cal). The TC647 enters shutdown mode when V  
MIN  
V
. During shutdown, the FAULT output is inactive  
SHDN  
and supply current falls to 25 µA (typical). The TC647  
exits shutdown mode when V . See  
Section 5.0, “Typical Applications”, for more details.  
1
2
3
4
5
6
7
8
V
IN  
V
MIN  
REL  
C
Analog Output  
Analog Input  
F
V
MIN  
GND  
Ground Terminal  
2.4  
Ground (GND)  
SENSE Analog Input  
FAULT Digital (Open Collector) Output  
GND denotes the ground terminal.  
2.5  
Analog Input (SENSE)  
V
Digital Output  
OUT  
V
Power Supply Input  
Pulses are detected at the SENSE pin as fan rotation  
chops the current through a sense resistor. The  
absence of pulses indicates a fault.  
DD  
2.1  
Analog Input (V )  
IN  
The thermistor network (or other temperature sensor)  
2.6  
Digital Output (FAULT)  
connects to the V input. A voltage range of 1.25V to  
IN  
2.65V (typical) on this pin drives an active duty cycle of  
The FAULT line goes low to indicate a fault condition.  
When FAULT goes low due to a fan fault condition, the  
device is latched in shutdown mode until deliberately  
cleared or until power is cycled. FAULT may be con-  
0% to 100% on the V  
pin.  
OUT  
2.2  
Analog Output (C )  
F
nected to V  
if a hard shutdown is desired.  
MIN  
C is the positive terminal for the PWM ramp generator  
F
timing capacitor. The recommended C is 1 µF for  
F
2.7  
Digital Output (V  
)
OUT  
is an active high complimentary output that drives  
30 Hz PWM operation.  
V
OUT  
the base of an external NPN transistor (via an appropri-  
ate base resistor) or the gate of an N-channel MOS-  
FET. This output has asymmetrical drive (see  
Section 1.0, “Electrical Characteristics”).  
2.8  
Power Supply Input (V  
)
DD  
may be independent of the fan’s power supply  
V
DD  
(see Section 1.0, “Electrical Characteristics”).  
DS21447C-page 4  
2002 Microchip Technology Inc.  
TC647  
3.0  
3.1  
DETAILED DESCRIPTION  
PWM  
CAUTION: Shutdown mode is unconditional. That is,  
the fan will not be activated regardless of the voltage  
at V . The fan should not be shut down until all heat  
IN  
producing activity in the system is at a negligible  
level.  
The PWM circuit consists of a ramp generator and  
threshold detector. The frequency of the PWM is deter-  
mined by the value of the capacitor connected to the C  
F
3.5  
SENSE Input  
input.  
A
frequency of 30 Hz is recommended  
(FanSenseTechnology)  
(C = 1 µF). The PWM is also the time base for the  
F
Start-up Timer (see Section 3.3, “Start-Up Timer”). The  
PWM voltage control range is 1.25V to 2.65V (typical)  
for 0% to 100% output duty cycle.  
The SENSE input (Pin 5) is connected to a low value  
current sensing resistor in the ground return leg of the  
fan circuit. During normal fan operation, commutation  
occurs as each pole of the fan is energized. This  
causes brief interruptions in the fan current, seen as  
pulses across the sense resistor. If the device is not in  
shutdown mode, and pulses are not appearing at the  
SENSE input, a fault exists.  
3.2  
The V  
VOUT Output  
pin is designed to drive a low cost transistor  
OUT  
or MOSFET as the low side power switching element in  
the system. Various examples of driver circuits will be  
shown throughout this data sheet. This output has an  
asymmetric complimentary drive and is optimized for  
driving NPN transistors or N-channel MOSFETs. Since  
the system relies on PWM rather than linear control,  
the power dissipation in the power switch is kept to a  
minimum. Generally, very small devices (TO-92 or SOT  
packages) will suffice.  
The short, rapid change in fan current (high dI/dt)  
causes a corresponding dV/dt across the sense  
resistor,  
R
.
The waveform on  
R
is  
SENSE  
SENSE  
differentiated and converted to a logic-level, pulse-train  
by C  
and the internal signal processing circuitry.  
SENSE  
The presence and frequency of this pulse-train is a  
direct indication of fan operation. See Section 5.0,  
“Typical Applications”, for more details.  
3.3  
Start-Up Timer  
3.6  
FAULT Output  
To ensure reliable fan start-up, the Start-up Timer turns  
the V  
output on for 32 cycles of the PWM whenever  
Pulses appearing at SENSE due to the PWM turning  
on are blanked with the remaining pulses being filtered  
by a missing pulse detector. If consecutive pulses are  
OUT  
the fan is started from the off state. This occurs at  
power up and when coming out of shutdown mode. If  
the PWM frequency is 30 Hz (C = 1 µF), the resulting  
not detected for 32 PWM cycles ( 1 Sec if C = 1 µF),  
F
F
OUT  
start-up time will be approximately one second. If a  
fault is detected, the Diagnostic Timer is triggered  
once, followed by the Start-up Timer. If the fault  
persists, the device is shut down (see Section 3.6,  
“FAULT Output”).  
the Diagnostic Timer is activated and V  
is driven  
high continuously for three PWM cycles ( 100 msec if  
C = 1 µF). If a pulse is not detected within this window,  
F
the Start-up Timer is triggered (see Section 3.3, “Start-  
Up Timer”). This should clear a transient fault condition.  
If the missing pulse detector times out again, the PWM  
is stopped and FAULT goes low. When FAULT is  
activated due to this condition, the device is latched in  
shutdown mode and will remain off indefinitely.  
3.4  
Shutdown Control (Optional)  
If V  
(Pin 3) is pulled below V  
, the TC647 will go  
MIN  
SHDN  
into shutdown mode. This can be accomplished by  
driving V with an open-drain logic signal or using an  
MIN  
Note: At this point, action must be taken to restart  
external transistor, as shown in Figure 3-1. All functions  
are suspended until the voltage on V becomes  
the fan by momentarily pulling V  
SHDN  
below  
MIN  
MIN  
V
, or cycling system power. In either  
higher than V  
(0.85V @ V  
= 5.0V). Pulling V  
DD MIN  
REL  
case, the fan cannot remain disabled due  
to a fault condition as severe system dam-  
age could result. If the fan cannot be  
restarted, the system should be shut down.  
below V  
will always result in complete device  
SHDN  
shutdown and reset. The FAULT output is  
unconditionally inactive in shutdown mode.  
A small amount of hysteresis, typically one percent of  
The TC647 may be configured to continuously attempt  
fan restarts, if so desired.  
V
V
V
(50 mV at V = 5.0V), is designed into the V  
/
SHDN  
DD  
REL  
REL  
DD  
threshold. The levels specified for V  
and  
SHDN  
in Section 1.0, “Electrical Characteristics”,  
include this hysteresis plus adequate margin to  
account for normal variations in the absolute value of  
the threshold and hysteresis.  
2002 Microchip Technology Inc.  
DS21447C-page 5  
TC647  
Continuous restart mode is enabled by connecting the  
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.  
FAULT output to V  
through a 0.1 µF capacitor, as  
MIN  
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  
SHDN  
input is momentarily pulled below  
MIN  
V
, initiating a reset and clearing the fault  
+5V  
10 kΩ  
C
1
+5V  
8
0.01µF  
+12V  
1 k  
C
1µF  
TC647  
RESET  
B
Fan  
From  
Temp  
Sensor  
1
V
DD  
6
V
1
0
IN  
FAULT  
Q
1
+5V  
Fault  
Detected  
R
BASE  
TC647  
R
3
7
5
V
OUT  
3
2
V
MIN  
C
B
SENSE  
R
1
0.01 µF  
From  
System  
C
SENSE  
Q
2
C
F
R
SENSE  
R
4
C
F
Shutdown  
Controller  
GND  
4
(Optional)  
1 µF  
Note: The parallel combination of R and R must be >10 k.  
3
4
FIGURE 3-1:  
Fan Fault Output Circuit.  
DS21447C-page 6  
2002 Microchip Technology Inc.  
TC647  
4.3  
Fan Fault  
4.0  
SYSTEM BEHAVIOR  
Fan Fault is an infinite loop wherein the TC647 is  
The flowcharts describing the TC647’s behavioral  
algorithm are shown in Figure 4-1. They can be  
summarized as follows:  
latched in shutdown mode. This mode can only be  
released by a reset (i.e., V  
SHDN  
being brought below  
MIN  
V
, then above V  
, or by power cycling).  
REL  
4.1  
Power-Up  
(1) While in this state, FAULT is latched on (low) and  
the V output is disabled.  
OUT  
(1) Assuming the device is not being held in shutdown  
mode (V > V )…  
(2) A reset sequence applied to the V  
the loop to Power-up.  
pin will exit  
MIN  
REL  
MIN  
(2) Turn V  
output on for 32 cycles of the PWM  
OUT  
clock. This ensures that the fan will start from a  
dead stop.  
(3) End.  
(3) During this Start-up Timer, if a fan pulse is  
detected, branch to Normal Operation; if none are  
received…  
(4) Activate the 32-cycle Start-up Timer one more time  
and look for fan pulse; if a fan pulse is detected,  
proceed to Normal Operation; if none are  
received…  
(5) Proceed to Fan Fault.  
(6) End.  
4.2  
Normal Operation  
Normal Operation is an endless loop which may only  
be exited by entering shutdown mode or Fan Fault. The  
loop can be thought of as executing at the frequency of  
the oscillator and PWM.  
(1) Reset the missing pulse detector.  
(2) Is TC647 in shutdown? If so…  
a. V  
duty cycle goes to zero.  
OUT  
b. FAULT is disabled.  
c. Exit the loop and wait for V  
> V  
to resume  
REL  
MIN  
operation (indistinguishable from Power-up).  
(3) Drive V  
to a duty cycle proportional to greater  
OUT  
of V and V  
on a cycle by cycle basis.  
MIN  
IN  
(4) If a fan pulse is detected, branch back to the start  
of the loop (1).  
(5) If the missing pulse detector times out …  
(6) Activate the 3-cycle Diagnostic Timer and look for  
pulses; if a fan pulse is detected, branch back to  
the start of the loop (1); if none are received…  
(7) Activate the 32-cycle Start-up Timer and look for  
pulses; if a fan pulse is detected, branch back to  
the start of the loop (1); if none are received…  
(8) Quit Normal Operation and go to Fan Fault.  
(9) End.  
2002 Microchip Technology Inc.  
DS21447C-page 7  
TC647  
Normal  
Operaton  
Power-Up  
Clear  
Missing Pulse  
Detector  
Power-on  
Reset  
FAULT = 1  
Yes  
< V  
SHDN  
Shutdown  
= 0  
V
MIN  
V
OUT  
Yes  
Shutdown  
= 0  
V
< V  
?
SHDN  
MIN  
No  
V
No  
OUT  
V
V
?
REL  
>
MIN  
No  
V
> V  
REL  
MIN  
No  
Yes  
Fire Start-up  
Timer  
(1 SEC)  
Yes  
Power-up  
Fire Start-up  
Timer
(1 SEC)  
Yes  
Yes  
Fan Fault  
Detected?  
Fan Pulse  
Detected?  
No  
V
OUT  
Proportional to Greater  
of V  
Normal  
Operation  
No  
V
or  
IN  
MIN  
Fan Fault  
Yes  
No  
Fan Pulse  
Detected?  
M.P.D.  
Expired?  
Fan Fault  
No  
Yes  
Fire Diagnostic  
Timer  
(100msec)  
FAULT = 0,  
= 0  
V
OUT  
No  
Fan Pulse  
Detected?  
Fire Start-up  
Timer  
(1 SEC)  
Yes  
No  
Cycling  
Power?  
No  
V
< V  
?
SHDN  
MIN  
Yes  
Fan Pulse  
Detected?  
Yes  
Yes  
No  
No  
V
> V  
REL  
?
MIN  
Fan Fault  
Yes  
Power-up  
FIGURE 4-1:  
TC647 Behavioral Algorithm Flowchart.  
DS21447C-page 8  
2002 Microchip Technology Inc.  
TC647  
The TC642 demonstration and prototyping board  
(TC642DEMO) and the TC642 Evaluation Kit  
(TC642EV) provide working examples of TC647 cir-  
cuits and prototyping aids. The TC642DEMO is a  
printed circuit board optimized for small size and ease  
of inclusion into system prototypes. The TC642EV is a  
larger board intended for benchtop development and  
analysis. At the very least, anyone contemplating a  
design using the TC647 should consult the documen-  
tation for both TC642EV and (DS21403) and  
TC642DEMO (DS21401). Figure 5-1 shows the base  
schematic for the TC642DEMO.  
5.0  
TYPICAL APPLICATIONS  
Designing with the TC647 involves the following:  
(1) The temp sensor network must be configured to  
deliver 1.25V to 2.65V on V for 0% to 100% of  
IN  
the temperature range to be regulated.  
(2) The minimum fan speed (V ) must be set.  
(3) The output drive transistor and associated circuitry  
must be selected.  
MIN  
(4) The SENSE network, R  
and C  
, must  
SENSE  
SENSE  
be designed for maximum efficiency while  
delivering adequate signal amplitude.  
(5) If shutdown capability is desired, the drive require-  
ments of the external signal or circuit must be  
considered.  
+5V*  
+12V  
C
B
1 µF  
NTC  
R
1
8
Fan  
1
V
V
DD  
IN  
C
B
0.01 µF  
Fan Fault  
Shutdown  
6
R
2
Q
FAULT  
1
R
BASE  
TC647  
7
V
OUT  
R
3
3
V
MIN  
5
C
B
0.01 µF  
SENSE  
2
Shutdown  
C
SENSE  
C
F
R
4
R
SENSE  
C
1 µF  
GND  
4
F
(Optional)  
Note: *See cautions regarding latch-up considerations in Section 5.0, "Typical Applications".  
FIGURE 5-1:  
Typical Application Circuit.  
2002 Microchip Technology Inc.  
DS21447C-page 9  
TC647  
EQUATION  
5.1  
Temperature Sensor Design  
V
x R  
2
The temperature signal connected to V must output a  
DD  
IN  
= V(T )  
1
voltage in the range of 1.25V to 2.65V (typical) for 0%  
to 100% of the temperature range of interest. The  
circuit in Figure 5-2 illustrates a convenient way to  
provide this signal.  
R
(T ) + R  
1 2  
TEMP  
V
x R  
2
DD  
= V(T )  
2
R
(T ) + R  
2 2  
TEMP  
V
DD  
Where T and T are the chosen temperatures and  
1
2
R
is the parallel combination of the thermistor  
TEMP  
and R .  
I
1
DIV  
These two equations facilitate solving for the two  
unknown variables, R and R . More information about  
1
2
Thermistors may be obtained from AN679, “Tempera-  
ture Sensing Technologies”, and AN685, “Thermistors  
in Single Supply Temperature Sensing Circuits”, which  
can be downloaded from Microchip’s website at  
www.microchip.com.  
RT  
NTC  
Thermistor  
R
R
= 100 kΩ  
1
1
2
100 k@ 25ºC  
V
IN  
5.2  
Minimum Fan Speed  
= 23.2 kΩ  
A voltage divider on V  
sets the minimum PWM duty  
MIN  
cycle and, thus, the minimum fan speed. As with the  
V
input, 1.25V to 2.65V corresponds to 0% to 100%  
IN  
FIGURE 5-2:  
Temperature Sensing  
duty cycle. Assuming that fan speed is linearly related  
to duty cycle, the minimum speed voltage is given by  
the equation:  
Circuit.  
Figure 5-2 illustrates a simple temperature dependent  
voltage divider circuit. RT is a conventional 100 k@  
1
EQUATION  
25°C NTC thermistor, while R and R are standard  
1
2
resistors. The supply voltage, V , is divided between  
DD  
Minimum Speed  
x (1.4V) + 1.25V  
R and the parallel combination of RT and R (for con-  
2
1
1
V
=
MIN  
Full Speed  
venience, the parallel combination of RT and R will  
1
1
be referred to as R  
). The resistance of the ther-  
TEMP  
For example, if 2500 RPM equates to 100% fan speed,  
and a minimum speed of 1000 RPM is desired, then  
mistor at various temperatures is obtained from the  
manufacturer’s specifications. Thermistors are often  
referred to in terms of their resistance at 25°C. Gener-  
ally, the thermistor shown in Figure 5-2 is a non-linear  
device with a negative temperature coefficient (also  
the V  
voltage is:  
MIN  
EQUATION  
called an NTC thermistor). In Figure 5-2, R is used to  
1
1000  
2500  
x (1.4V) + 1.25V = 1.81V  
V
=
linearize the thermistor temperature response and R  
MIN  
2
is used to produce a positive temperature coefficient at  
the V node. As an added benefit, this configuration  
IN  
The V  
voltage may be set using a simple resistor  
MIN  
produces an output voltage delta of 1.4V, which is well  
divider as shown in Figure 5-3. Per Section 1.0,  
“Electrical Characteristics”, the leakage current at the  
within the range of the V  
specification of the  
C(SPAN)  
TC647. A 100 kNTC thermistor is selected for this  
application in order to keep I at a minimum.  
V
pin is no more than 1 µA. It would be very  
MIN  
DIV  
conservative to design for a divider current, I , of  
DIV  
For the voltage range at V to be equal to 1.25V to  
IN  
100 µA. If V = 5.0V then;  
DD  
2.65V, the temperature range of this configuration is  
0°C to 50°C. If a different temperature range is required  
EQUATION  
from this circuit, R should be chosen to equal the  
1
resistance value of the thermistor at the center of this  
new temperature range. It is suggested that a maxi-  
mum temperature range of 50°C be used with this cir-  
cuit due to thermistor linearity limitations. With this  
5.0V  
–4  
I
= 1e A =  
, therefore  
DIV  
R + R  
1
2
5.0V  
1e A  
R + R =  
= 50,000 = 50 kΩ  
1
2
–4  
change, R is adjusted according to the following  
2
equations:  
DS21447C-page 10  
2002 Microchip Technology Inc.  
TC647  
V
output is “off” most of the time. The fan may be  
OUT  
V
DD  
rotating normally, but the commutation events are  
occurring during the PWM’s off-time.  
The phase relationship between the fan’s commutation  
and the PWM edges tends to “walk around” as the  
system operates. At certain points, the TC647 may fail  
to capture a pulse within the 32-cycle missing pulse  
detector window. When this happens, the 3-cycle  
R
1
I
IN  
Diagnostic Timer will be activated, the V  
output will  
OUT  
I
V
DIV  
MIN  
be active continuously for three cycles and, if the fan is  
operating normally, a pulse will be detected. If all is  
well, the system will return to normal operation. There  
is no harm in this behavior, but it may be audible to the  
user as the fan will accelerate briefly when the  
Diagnostic Timer fires. For this reason, it is  
R
2
recommended that V  
be set no lower than 1.8V.  
MIN  
GND  
5.4  
FanSenseNetwork  
(RSENSE and CSENSE  
FIGURE 5-3:  
V
Circuit.  
MIN  
)
We can further specify R and R by the condition that  
1
2
the divider voltage is equal to our desired V . This  
The FanSense network, comprised of R  
and  
MIN  
SENSE  
yields the following equation:  
C
, allows the TC647 to detect commutation of  
SENSE  
the fan motor (FanSense™ technology). This network  
can be thought of as a differentiator and threshold  
EQUATION  
detector. The function of R  
current into a voltage. C  
is to convert the fan  
SENSE  
SENSE  
V
x R  
2
DD  
serves to AC-couple this  
V
=
MIN  
voltage signal and provide a ground referenced input to  
the SENSE pin. Designing a proper SENSE network is  
R + R  
1
2
simply a matter of scaling R  
to provide the  
SENSE  
Solving for the relationship between R and R results  
in the following equation:  
1
2
necessary amount of gain (i.e., the current-to-voltage  
conversion ratio). A 0.1 µF ceramic capacitor is recom-  
mended for C  
. Smaller values require larger  
SENSE  
EQUATION  
sense resistors, and higher value capacitors are bulkier  
and more expensive. Using a 0.1 µF results in  
V
- V  
DD  
MIN  
R = R x  
1
2
reasonable values for R  
. Figure 5-4 illustrates a  
SENSE  
V
MIN  
typical SENSE network. Figure 5-5 shows the  
waveforms observed using a typical SENSE network.  
In this example, R = (1.762) R . Substituting this rela-  
tionship back into the previous equation yields the  
resistor values:  
1
2
V
DD  
R = 18.1 kΩ  
2
R = 31.9 kΩ  
1
In this case, the standard values of 31.6 kand  
18.2 kare very close to the calculated values and  
would be more than adequate.  
FAN  
R
5.3  
Operations at Low Duty Cycle  
BASE  
V
OUT  
Q
1
One boundary condition which may impact the selec-  
tion of the minimum fan speed is the irregular activation  
of the Diagnostic Timer due to the TC647 “missing” fan  
commutation pulses at low speeds. This is a natural  
consequence of low PWM duty cycles (typically 25% or  
less). Recall that the SENSE function detects commu-  
tation of the fan as disturbances in the current through  
SENSE  
C
SENSE  
(0.1 µF Typ.)  
R
SENSE  
R
. These can only occur when the fan is ener-  
SENSE  
GND  
gized (i.e., V  
is “on”). At very low duty cycles, the  
OUT  
FIGURE 5-4:  
SENSE Network.  
2002 Microchip Technology Inc.  
DS21447C-page 11  
TC647  
5.5  
Output Drive Transistor Selection  
Tek Run: 10.0kS/s Sample  
The TC647 is designed to drive an external transistor  
[
T
]
or MOSFET for modulating power to the fan. This is  
shown as Q in Figures 3-1, 5-1, 5-4, 5-6, 5-7, 5-8  
1
and 5-9. The V  
pin has a minimum source current  
OUT  
of 5 mA and a minimum sink current of 1 mA. Bipolar  
transistors or MOSFETs may be used as the power  
switching element, as shown in Figure 5-7. When high  
current gain is needed to drive larger fans, two transis-  
tors may be used in a Darlington configuration. These  
circuit topologies are shown in Figure 5-7: (a) shows a  
single NPN transistor used as the switching element;  
(b) illustrates the Darlington pair; and (c) shows an N-  
channel MOSFET.  
Waveform @ Sense Resistor  
Waveform @ Sense Pin  
GND  
1
2
90mV  
50mV  
GND  
T
One major advantage of the TC647’s PWM control  
scheme versus linear speed control is that the power  
dissipation in the pass element is kept very low. Gener-  
ally, low cost devices in very small packages, such as  
TO-92 or SOT, can be used effectively. For fans with  
nominal operating currents of no more than 200 mA, a  
single transistor usually suffices. Above 200 mA, the  
Darlington or MOSFET solution is recommended. For  
the fan sensing function to work correctly, it is impera-  
tive that the pass transistor be fully saturated when  
“on”.  
Table 5-2 gives examples of some commonly available  
transistors and MOSFETs. This table should be used  
as a guide only since there are many transistors and  
MOSFETs which will work just as well as those listed.  
The critical issues when choosing a device to use as  
100mV  
M5.00ms  
142mV  
Ch1  
Ch2  
100mV  
Ch1  
FIGURE 5-5:  
SENSE Waveforms.  
Table 5-1 lists the recommended values of R  
SENSE  
based on the nominal operating current of the fan. Note  
that the current draw specified by the fan manufacturer  
may be a worst-case rating for near-stall conditions and  
not the fan’s nominal operating current. The values in  
Table 5-1 refer to actual average operating current. If  
the fan current falls between two of the values listed,  
use the higher resistor value. The end result of employ-  
ing Table 5-1 is that the signal developed across the  
sense resistor is approximately 450 mV in amplitude.  
TABLE 5-1:  
Nominal Fan Current (mA)  
RSENSE VS. FAN CURRENT  
Q
V
are: (1) the breakdown voltage (V  
or  
1
DS  
(BR)CEO  
(MOSFET)) must be large enough to withstand the  
R
()  
SENSE  
9.1  
4.7  
3.0  
2.4  
2.0  
1.8  
1.5  
1.3  
1.2  
1.0  
highest voltage applied to the fan (Note: This will occur  
when the fan is off); (2) 5 mA of base drive current must  
be enough to saturate the transistor when conducting  
the full fan current (transistor must have sufficient  
50  
100  
150  
200  
250  
300  
350  
400  
450  
500  
gain); (3) the V  
voltage must be high enough to suf-  
OUT  
ficiently drive the gate of the MOSFET to minimize the  
R
of the device; (4) rated fan current draw must  
DS(on)  
be within the transistor's/MOSFET's current handling  
capability; and (5) power dissipation must be kept  
within the limits of the chosen device.  
A base-current limiting resistor is required with bipolar  
transistors. This is shown in Figure 5-6.  
DS21447C-page 12  
2002 Microchip Technology Inc.  
TC647  
The correct value for this resistor can be determined as  
follows:  
V
DD  
V
V
V
= VRSENSE + V  
+ V  
RBASE  
OH  
BE(SAT)  
x R  
SENSE  
= I  
RSENSE  
RBASE  
BASE  
FAN  
= R  
= I  
x I  
BASE  
BASE  
/ h  
FAN FE  
Fan  
I
V
is specified as 80% of V  
in Section 1.0,  
DD  
OH  
“Electrical Characteristics”; V  
is given in the cho-  
BE(SAT)  
R
BASE  
sen transistor data sheet. It is now possible to solve for  
R
V
= 80% V  
DD  
OH  
Q
R
1
.
+
BASE  
V
R
BASE  
+
V
BE  
(SAT)  
EQUATION  
+
V
R
V
- V  
- V  
SENSE  
SENSE  
OH  
BE(SAT) RSENSE  
R
=
BASE  
I
BASE  
Some applications require the fan to be powered from the  
negative 12V supply to keep motor noise out of the  
positive voltage power supplies. As shown in Figure 5-8,  
GND  
FIGURE 5-6:  
BASE  
Circuit For Determining  
R
.
zener diode D offsets the -12V power supply voltage,  
1
holding transistor Q off when V  
is low. When V  
1
is  
OUT  
1
OUT  
OUT  
high, the voltage at the anode of D increases by V  
causing Q to turn on. Operation is otherwise the same as  
1
the case of fan operation from +12V.  
TABLE 5-2:  
Device  
TRANSISTORS AND MOSFETS FOR Q (V = 5V)  
1
DD  
Max. V  
/V  
V
/V  
Fan Current  
(mA)  
Suggested  
BE(sat) GS  
CEO DS  
Package  
Min. H  
FE  
(V)  
(V)  
R
()  
BASE  
800  
800  
301  
Note 1  
Note 1  
Note 1  
Note 1  
MMBT2222A  
MPS2222A  
MPS6602  
SI2302  
MGSF1N02E  
SI4410  
SOT-23  
TO-92  
TO-92  
SOT-23  
SOT-23  
SO-8  
1.2  
1.2  
1.2  
2.5  
2.5  
4.5  
4.5  
50  
50  
50  
NA  
NA  
NA  
NA  
40  
40  
40  
20  
20  
30  
60  
150  
150  
500  
500  
500  
1000  
500  
SI2308  
SOT-23  
Note 1: A series gate resistor may be used in order to control the MOSFET turn-on and turn-off times.  
2002 Microchip Technology Inc.  
DS21447C-page 13  
TC647  
V
V
DD  
V
DD  
DD  
Fan  
Fan  
Fan  
R
BASE  
R
BASE  
V
OUT  
Q
1
V
Q
R
OUT  
1
Q
R
V
1
OUT  
Q
2
SENSE  
SENSE  
R
SENSE  
GND  
GND  
GND  
b) Darlington Transistor Pair  
a) Single Bipolar Transistor  
C) N-Channel MOSFET  
FIGURE 5-7:  
Output Drive Transistor Circuit Topologies.  
ing points can result in enough parasitic capacitance  
and/or inductance in the power supply connections to  
delay one power supply “routing” versus another.  
+5V  
V
DD  
R
*
2
2.2 kΩ  
5.7  
Power Supply Routing and  
Bypassing  
V
OUT  
Fan  
Q
D
1
TC647  
12.0V  
Zener  
Noise present on the V and V  
inputs may cause  
IN  
MIN  
*
erroneous operation of the FAULT output. As a result,  
these inputs should be bypassed with a 0.01 µF capac-  
itor mounted as close to the package as possible. This  
1
GND  
R
*
R
2.2 Ω  
*
4
3
10 kΩ  
is particularly true of V , which is usually driven from a  
IN  
high impedance source (such as a thermistor). In addi-  
tion, the V  
input should be bypassed with a 1 µF  
DD  
-12V  
*Note: Value depends on the specific application and is shown for example only.  
capacitor. Ground should be kept as short as possible.  
To keep fan noise off the TC647 ground pin, individual  
ground returns for the TC647 and the low side of the  
fan current sense resistor should be used.  
FIGURE 5-8:  
Powering the Fan from a  
-12V Supply.  
Design Example  
5.6  
Latch-Up Considerations  
Step 1. Calculate R and R based on using an NTC  
1
2
having a resistance of 10 kat T  
(25°C)  
MIN  
As with any CMOS IC, the potential exists for latch-up  
if signals are applied to the device which are outside  
the power supply range. This is of particular concern  
during power-up if the external circuitry (such as the  
and 4.65 kat T  
(45°C) (see Figure 5-9).  
MAX  
R = 20.5 kΩ  
1
R = 3.83 kΩ  
2
sensor network, V  
divider or shutdown circuit) is  
Step 2. Set minimum fan speed V  
= 1.8V.  
MIN  
MIN  
powered by a supply different from that of the TC647.  
Limit the divider current to 100 µA from which  
Care should be taken to ensure that the TC647’s V  
R = 33 kand R = 18 kΩ  
DD  
5
6
supply powers up first. If possible, the networks  
Step 3. Design the output circuit.  
attached to V and V  
should connect to the V  
DD  
IN  
MIN  
Maximum fan motor current = 250 mA.  
supply at the same physical location as the IC itself.  
Even if the IC and any external networks are powered  
by the same supply, physical separation of the connect-  
Q beta is chosen at 50 from which  
1
R = 800Ω.  
7
DS21447C-page 14  
2002 Microchip Technology Inc.  
TC647  
+5V  
+5V  
+12V  
Fan  
+
NTC  
10 kΩ  
@ 25°C  
1
C
B
R
1
1 µF  
20.5 kΩ  
8
4
V
DD  
V
GND  
IN  
C
B
R
2
0.01 µF  
System  
Fault  
6
3.83 kΩ  
Q
FAULT  
1
+5V  
R
800 Ω  
7
TC647  
7
5
V
OUT  
R
33 kΩ  
5
3
V
MIN  
C
B
0.01 µF  
2
SENSE  
C
Fan Shutdown  
SENSE  
0.1 µF  
Q
2
R
6
18 kΩ  
C
F
R
10 kΩ  
R
SENSE  
8
2.2 Ω  
C
1 µF  
1
(Optional)  
FIGURE 5-9:  
Design Example.  
5.8  
TC647 as a Microcontroller  
Peripheral  
In a system containing a microcontroller or other host  
intelligence, the TC647 can be effectively managed as  
a CPU peripheral. Routine fan control functions can be  
performed by the TC647 without controller intervention.  
The microcontroller receives temperature data from one  
or more points throughout the system. It calculates a fan  
operating speed based on an algorithm specifically  
designed for the application at hand. The processor  
controls fan speed using complimentary port bits I/O1  
through I/O3. Resistors R through R (5% tolerance)  
1
6
form a crude 3-bit DAC that translates the 3-bit code  
from the controller or processor's outputs into a 1.6V DC  
control signal. A monolithic DAC or digital pot may be  
used instead of the circuit shown in Figure 5-10.  
With V  
set to 1.8V, the TC647 has a minimum  
MIN  
operating speed of approximately 40% of full rated  
speed when the processor's output code is 000[B].  
Output codes 001[B] to 111[B] operate the fan from  
roughly 40% to 100% of full speed. An open-drain  
output from the processor I/O can be used to reset the  
TC647 following detection of a fault condition. The  
FAULT output can be connected to the processor's  
interrupt input, or to an I/O pin, for polled operation (see  
Figure 5-10).  
2002 Microchip Technology Inc.  
DS21447C-page 15  
TC647  
+12V  
Fan  
+5V  
Open-drain  
Outputs  
(Optional)  
(RESET)  
(MSB)  
I/O0  
+5V  
R
1
8
110 kΩ  
1
2
I/O1  
I/O2  
I/O3  
V
IN  
V
DD  
+
C
B
R
2
240 kΩ  
C
.01 µF  
B
Analog or Digital  
Temperature  
Data from one or  
more Sensors  
1 µF  
R
800Ω  
CMOS  
Outputs  
9
7
C
V
R
3
360 kΩ  
F
OUT  
2N2222A  
+
+5V  
TC647  
1 µF  
R
R
10  
R
18 kΩ  
7
(LSB)  
4
CMOS  
Microcontroller  
33 kΩ  
+5V  
18 kΩ  
10 kΩ  
3
6
5
R
5
V
MIN  
FAULT  
1.5 kΩ  
C
B
R
+5V  
8
.01 µF  
0.1 µF  
4
R
6
SENSE  
GND  
1 kΩ  
R
11  
2.2Ω  
GND  
INT  
FIGURE 5-10:  
TC647 as a Microcontroller Peripheral.  
DS21447C-page 16  
2002 Microchip Technology Inc.  
TC647  
6.0  
6.1  
PACKAGING INFORMATION  
Package Marking Information  
8-Lead PDIP (300 mil)  
Example:  
XXXXXXXX  
NNN  
TC647VPA  
025  
YYWW  
0215  
8-Lead SOIC (150 mil)  
Example:  
XXXXXXXX  
YYWW  
TC647VOA  
0215  
NNN  
025  
Example:  
8-Lead MSOP  
TC647E  
XXXXXX  
YWWNNN  
215025  
Legend: XX...X Customer specific information*  
YY  
WW  
NNN  
Year code (last 2 digits of calendar year)  
Week code (week of January 1 is week ‘01’)  
Alphanumeric traceability code  
Note:  
In the event the full Microchip part number cannot be marked on one line, it will  
be carried over to the next line thus limiting the number of available characters  
for customer specific information.  
*
Standard marking consists of Microchip part number, year code, week code, traceability code (facility  
code, mask rev#, and assembly code). For marking beyond this, certain price adders apply. Please check  
with your Microchip Sales Office.  
2002 Microchip Technology Inc.  
DS21447C-page 17  
TC647  
8-Lead Plastic Dual In-line (P) – 300 mil (PDIP)  
E1  
D
2
n
1
α
E
A2  
A
L
c
A1  
β
B1  
B
p
eB  
Units  
Dimension Limits  
INCHES*  
NOM  
MILLIMETERS  
MIN  
MAX  
MIN  
NOM  
8
MAX  
n
p
A
A2  
A1  
E
E1  
D
L
c
B1  
B
Number of Pins  
Pitch  
Top to Seating Plane  
Molded Package Thickness  
Base to Seating Plane  
Shoulder to Shoulder Width  
Molded Package Width  
Overall Length  
Tip to Seating Plane  
Lead Thickness  
Upper Lead Width  
Lower Lead Width  
Overall Row Spacing  
Mold Draft Angle Top  
Mold Draft Angle Bottom  
8
.100  
.155  
.130  
2.54  
3.94  
3.30  
.140  
.170  
.145  
3.56  
2.92  
4.32  
3.68  
.115  
.015  
.300  
.240  
.360  
.125  
.008  
.045  
.014  
.310  
5
0.38  
7.62  
6.10  
9.14  
3.18  
0.20  
1.14  
0.36  
7.87  
5
.313  
.250  
.373  
.130  
.012  
.058  
.018  
.370  
10  
.325  
.260  
.385  
.135  
.015  
.070  
.022  
.430  
15  
7.94  
6.35  
9.46  
3.30  
0.29  
1.46  
0.46  
9.40  
10  
8.26  
6.60  
9.78  
3.43  
0.38  
1.78  
0.56  
10.92  
15  
§
eB  
α
β
5
10  
15  
5
10  
15  
* Controlling Parameter  
§ Significant Characteristic  
Notes:  
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed  
.010” (0.254mm) per side.  
JEDEC Equivalent: MS-001  
Drawing No. C04-018  
DS21447C-page 18  
2002 Microchip Technology Inc.  
TC647  
8-Lead Plastic Small Outline (SN) – Narrow, 150 mil (SOIC)  
E
E1  
p
D
2
B
n
1
h
α
45×  
c
A2  
A
f
β
L
A1  
Units  
INCHES*  
NOM  
MILLIMETERS  
Dimension Limits  
MIN  
MAX  
MIN  
NOM  
8
MAX  
n
p
A
A2  
A1  
E
E1  
D
h
L
f
Number of Pins  
Pitch  
Overall Height  
8
.050  
.061  
.056  
.007  
.237  
.154  
.193  
.015  
.025  
4
1.27  
.053  
.069  
1.35  
1.32  
1.55  
1.42  
0.18  
6.02  
3.91  
4.90  
0.38  
0.62  
4
1.75  
1.55  
0.25  
6.20  
3.99  
5.00  
0.51  
0.76  
8
Molded Package Thickness  
Standoff  
.052  
.004  
.228  
.146  
.189  
.010  
.019  
0
.061  
.010  
.244  
.157  
.197  
.020  
.030  
8
§
0.10  
5.79  
3.71  
4.80  
0.25  
0.48  
0
Overall Width  
Molded Package Width  
Overall Length  
Chamfer Distance  
Foot Length  
Foot Angle  
c
Lead Thickness  
Lead Width  
.008  
.013  
0
.009  
.017  
12  
.010  
.020  
15  
0.20  
0.33  
0
0.23  
0.42  
12  
0.25  
0.51  
15  
B
α
β
Mold Draft Angle Top  
Mold Draft Angle Bottom  
0
12  
15  
0
12  
15  
* Controlling Parameter  
§ Significant Characteristic  
Notes:  
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed  
.010” (0.254mm) per side.  
JEDEC Equivalent: MS-012  
Drawing No. C04-057  
2002 Microchip Technology Inc.  
DS21447C-page 19  
TC647  
6.2  
8-Lead Plastic Micro Small Outline Package (MS) (MSOP)  
E
p
E1  
D
2
1
B
n
α
A2  
A
c
φ
A1  
(F)  
L
β
Units  
Dimension Limits  
INCHES  
NOM  
MILLIMETERS*  
NOM  
MIN  
MAX  
MIN  
MAX  
8
n
p
Number of Pins  
Pitch  
8
.026  
0.65  
Overall Height  
Molded Package Thickness  
A
A2  
A1  
E
E1  
D
.044  
1.18  
.030  
.034  
.038  
.006  
.200  
.122  
.122  
.028  
.039  
0.76  
0.05  
0.86  
0.97  
0.15  
.5.08  
3.10  
3.10  
0.70  
1.00  
Standoff  
§
.002  
.184  
.114  
.114  
.016  
.035  
Overall Width  
Molded Package Width  
Overall Length  
Foot Length  
Footprint (Reference)  
Foot Angle  
.193  
.118  
.118  
.022  
.037  
4.90  
3.00  
3.00  
0.55  
0.95  
4.67  
2.90  
2.90  
0.40  
0.90  
L
F
φ
0
6
0
6
c
Lead Thickness  
Lead Width  
Mold Draft Angle Top  
Mold Draft Angle Bottom  
.004  
.010  
.006  
.012  
.008  
.016  
0.10  
0.25  
0.15  
0.30  
0.20  
0.40  
B
α
β
7
7
7
7
*Controlling Parameter  
§ Significant Characteristic  
Notes:  
Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not  
exceed. 010" (0.254mm) per side.  
Drawing No. C04-111  
DS21447C-page 20  
2002 Microchip Technology Inc.  
TC647  
6.3  
Taping Form  
Component Taping Orientation for 8-Pin SOIC (Narrow) Devices  
User Direction of Feed  
PIN 1  
W
P
Standard Reel Component Orientation  
for TR Suffix Device  
Carrier Tape, Number of Components Per Reel and Reel Size  
Package  
Carrier Width (W)  
Pitch (P)  
Part Per Full Reel  
Reel Size  
8-Pin SOIC (N)  
12 mm  
8 mm  
2500  
13 in  
Component Taping Orientation for 8-Pin MSOP Devices  
User Direction of Feed  
PIN 1  
W
P
Standard Reel Component Orientation  
for TR Suffix Device  
Carrier Tape, Number of Components Per Reel and Reel Size  
Package  
Carrier Width (W)  
Pitch (P)  
Part Per Full Reel  
Reel Size  
8-Pin MSOP  
12 mm  
8 mm  
2500  
13 in  
2002 Microchip Technology Inc.  
DS21447C-page 21  
TC647  
NOTES:  
DS21447C-page 22  
2002 Microchip Technology Inc.  
TC647  
ON-LINE SUPPORT  
Microchip provides on-line support on the Microchip  
World Wide Web site.  
SYSTEMS INFORMATION AND  
UPGRADE HOT LINE  
The Systems Information and Upgrade Line provides  
system users a listing of the latest versions of all of  
Microchip's development systems software products.  
Plus, this line provides information on how customers  
can receive the most current upgrade kits.The Hot Line  
Numbers are:  
1-800-755-2345 for U.S. and most of Canada, and  
1-480-792-7302 for the rest of the world.  
The web site is used by Microchip as a means to make  
files and information easily available to customers. To  
view the site, the user must have access to the Internet  
®
®
and a web browser, such as Netscape or Microsoft  
Internet Explorer. Files are also available for FTP  
download from our FTP site.  
ConnectingtotheMicrochipInternetWebSite  
The Microchip web site is available at the following  
URL:  
092002  
www.microchip.com  
The file transfer site is available by using an FTP ser-  
vice to connect to:  
ftp://ftp.microchip.com  
The web site and file transfer site provide a variety of  
services. Users may download files for the latest  
Development Tools, Data Sheets, Application Notes,  
User's Guides, Articles and Sample Programs. A vari-  
ety of Microchip specific business information is also  
available, including listings of Microchip sales offices,  
distributors and factory representatives. Other data  
available for consideration is:  
• Latest Microchip Press Releases  
Technical Support Section with Frequently Asked  
Questions  
• Design Tips  
• Device Errata  
• Job Postings  
• Microchip Consultant Program Member Listing  
• Links to other useful web sites related to  
Microchip Products  
• Conferences for products, Development Systems,  
technical information and more  
• Listing of seminars and events  
2002 Microchip Technology Inc.  
DS21447C-page23  
TC647  
READER RESPONSE  
It is our intention to provide you with the best documentation possible to ensure successful use of your Microchip prod-  
uct. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation  
can better serve you, please FAX your comments to the Technical Publications Manager at (480) 792-4150.  
Please list the following information, and use this outline to provide us with your comments about this document.  
To:  
Technical Publications Manager  
Reader Response  
Total Pages Sent ________  
RE:  
From:  
Name  
Company  
Address  
City / State / ZIP / Country  
Telephone: (_______) _________ - _________  
FAX: (______) _________ - _________  
Application (optional):  
Would you like a reply?  
Y
N
Literature Number:  
DS21447C  
Device:  
TC647  
Questions:  
1. What are the best features of this document?  
2. How does this document meet your hardware and software development needs?  
3. Do you find the organization of this document easy to follow? If not, why?  
4. What additions to the document do you think would enhance the structure and subject?  
5. What deletions from the document could be made without affecting the overall usefulness?  
6. Is there any incorrect or misleading information (what and where)?  
7. How would you improve this document?  
DS21447C-page24  
2002 Microchip Technology Inc.  
TC647  
PRODUCT IDENTIFICATION SYSTEM  
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.  
PART NO.  
Device  
X
/XX  
Examples:  
Temperature Package  
Range  
a)  
b)  
c)  
d)  
TC647VOA: PWM Fan Speed Controller w/  
Fault Detection, SOIC package.  
TC647VUA: PWM Fan Speed Controller w/  
Fault Detection, MSOP package.  
TC647VPA: PWM Fan Speed Controller w/  
Fault Detection, PDIP package.  
TC647EOATR: PWM Fan Speed Controller  
w/Fault Detection, SOIC package, Tape and  
Reel.  
Device:  
TC647:  
PWM Fan Speed Controller w/Fault Detection  
Temperature Range:  
Package:  
V
E
=
=
0°C to +85°C  
-40°C to +85°C  
PA  
OA  
UA  
=
=
=
Plastic DIP (300 mil Body), 8-lead *  
Plastic SOIC, (150 mil Body), 8-lead  
Plastic Micro Small Outline (MSOP), 8-lead  
* PDIP package is only offered in the V temp range  
Sales and Support  
Data Sheets  
Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-  
mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:  
1. Your local Microchip sales office  
2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277  
3. The Microchip Worldwide Site (www.microchip.com)  
Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.  
New Customer Notification System  
Register on our web site (www.microchip.com/cn) to receive the most current information on our products.  
2002 Microchip Technology Inc.  
DS21447C-page25  
TC647  
NOTES:  
DS21447C-page 26  
2002 Microchip Technology Inc.  
Information contained in this publication regarding device  
applications and the like is intended through suggestion only  
and may be superseded by updates. It is your responsibility to  
ensure that your application meets with your specifications.  
No representation or warranty is given and no liability is  
assumed by Microchip Technology Incorporated with respect  
to the accuracy or use of such information, or infringement of  
patents or other intellectual property rights arising from such  
use or otherwise. Use of Microchip’s products as critical com-  
ponents in life support systems is not authorized except with  
express written approval by Microchip. No licenses are con-  
veyed, implicitly or otherwise, under any intellectual property  
rights.  
Trademarks  
The Microchip name and logo, the Microchip logo, KEELOQ,  
MPLAB, PIC, PICmicro, PICSTART and PRO MATE are  
registered trademarks of Microchip Technology Incorporated  
in the U.S.A. and other countries.  
FilterLab, microID, MXDEV, MXLAB, PICMASTER, SEEVAL  
and The Embedded Control Solutions Company are  
registered trademarks of Microchip Technology Incorporated  
in the U.S.A.  
dsPIC, dsPICDEM.net, ECONOMONITOR, FanSense,  
FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP,  
ICEPIC, microPort, Migratable Memory, MPASM, MPLIB,  
MPLINK, MPSIM, PICC, PICDEM, PICDEM.net, rfPIC, Select  
Mode and Total Endurance are trademarks of Microchip  
Technology Incorporated in the U.S.A. and other countries.  
Serialized Quick Turn Programming (SQTP) is a service mark  
of Microchip Technology Incorporated in the U.S.A.  
All other trademarks mentioned herein are property of their  
respective companies.  
© 2002, Microchip Technology Incorporated, Printed in the  
U.S.A., All Rights Reserved.  
Printed on recycled paper.  
Microchip received QS-9000 quality system  
certification for its worldwide headquarters,  
design and wafer fabrication facilities in  
Chandler and Tempe, Arizona in July 1999  
and Mountain View, California in March 2002.  
The Company’s quality system processes and  
procedures are QS-9000 compliant for its  
®
PICmicro 8-bit MCUs, KEELOQ® code hopping  
devices, Serial EEPROMs, microperipherals,  
non-volatile memory and analog products. In  
addition, Microchip’s quality system for the  
design and manufacture of development  
systems is ISO 9001 certified.  
2002 Microchip Technology Inc.  
DS21447C - page 27  
M
WORLDWIDE SALES AND SERVICE  
Japan  
AMERICAS  
ASIA/PACIFIC  
Microchip Technology Japan K.K.  
Benex S-1 6F  
Corporate Office  
Australia  
2355 West Chandler Blvd.  
Microchip Technology Australia Pty Ltd  
Suite 22, 41 Rawson Street  
Epping 2121, NSW  
3-18-20, Shinyokohama  
Kohoku-Ku, Yokohama-shi  
Kanagawa, 222-0033, Japan  
Tel: 81-45-471- 6166 Fax: 81-45-471-6122  
Chandler, AZ 85224-6199  
Tel: 480-792-7200 Fax: 480-792-7277  
Technical Support: 480-792-7627  
Web Address: http://www.microchip.com  
Australia  
Tel: 61-2-9868-6733 Fax: 61-2-9868-6755  
Korea  
Rocky Mountain  
China - Beijing  
Microchip Technology Korea  
168-1, Youngbo Bldg. 3 Floor  
Samsung-Dong, Kangnam-Ku  
Seoul, Korea 135-882  
2355 West Chandler Blvd.  
Chandler, AZ 85224-6199  
Tel: 480-792-7966 Fax: 480-792-4338  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Beijing Liaison Office  
Unit 915  
Bei Hai Wan Tai Bldg.  
Tel: 82-2-554-7200 Fax: 82-2-558-5934  
Atlanta  
No. 6 Chaoyangmen Beidajie  
Beijing, 100027, No. China  
Tel: 86-10-85282100 Fax: 86-10-85282104  
500 Sugar Mill Road, Suite 200B  
Atlanta, GA 30350  
Singapore  
Microchip Technology Singapore Pte Ltd.  
200 Middle Road  
Tel: 770-640-0034 Fax: 770-640-0307  
China - Chengdu  
#07-02 Prime Centre  
Boston  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Chengdu Liaison Office  
Rm. 2401, 24th Floor,  
Singapore, 188980  
2 Lan Drive, Suite 120  
Westford, MA 01886  
Tel: 978-692-3848 Fax: 978-692-3821  
Tel: 65-6334-8870 Fax: 65-6334-8850  
Taiwan  
Ming Xing Financial Tower  
Microchip Technology (Barbados) Inc.,  
Taiwan Branch  
Chicago  
No. 88 TIDU Street  
333 Pierce Road, Suite 180  
Itasca, IL 60143  
Chengdu 610016, China  
11F-3, No. 207  
Tel: 86-28-86766200 Fax: 86-28-86766599  
Tung Hua North Road  
Taipei, 105, Taiwan  
Tel: 630-285-0071 Fax: 630-285-0075  
China - Fuzhou  
Dallas  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Fuzhou Liaison Office  
Unit 28F, World Trade Plaza  
Tel: 886-2-2717-7175 Fax: 886-2-2545-0139  
4570 Westgrove Drive, Suite 160  
Addison, TX 75001  
Tel: 972-818-7423 Fax: 972-818-2924  
No. 71 Wusi Road  
EUROPE  
Austria  
Detroit  
Fuzhou 350001, China  
Tri-Atria Office Building  
Tel: 86-591-7503506 Fax: 86-591-7503521  
Microchip Technology Austria GmbH  
Durisolstrasse 2  
32255 Northwestern Highway, Suite 190  
Farmington Hills, MI 48334  
Tel: 248-538-2250 Fax: 248-538-2260  
China - Shanghai  
Microchip Technology Consulting (Shanghai)  
Co., Ltd.  
A-4600 Wels  
Austria  
Kokomo  
Room 701, Bldg. B  
Tel: 43-7242-2244-399  
Fax: 43-7242-2244-393  
Denmark  
2767 S. Albright Road  
Kokomo, Indiana 46902  
Tel: 765-864-8360 Fax: 765-864-8387  
Los Angeles  
Far East International Plaza  
No. 317 Xian Xia Road  
Shanghai, 200051  
Microchip Technology Nordic ApS  
Regus Business Centre  
Lautrup hoj 1-3  
Tel: 86-21-6275-5700 Fax: 86-21-6275-5060  
18201 Von Karman, Suite 1090  
Irvine, CA 92612  
China - Shenzhen  
Microchip Technology Consulting (Shanghai)  
Co., Ltd., Shenzhen Liaison Office  
Rm. 1315, 13/F, Shenzhen Kerry Centre,  
Renminnan Lu  
Ballerup DK-2750 Denmark  
Tel: 949-263-1888 Fax: 949-263-1338  
Tel: 45 4420 9895 Fax: 45 4420 9910  
New York  
France  
150 Motor Parkway, Suite 202  
Hauppauge, NY 11788  
Microchip Technology SARL  
Parc d’Activite du Moulin de Massy  
43 Rue du Saule Trapu  
Shenzhen 518001, China  
Tel: 631-273-5305 Fax: 631-273-5335  
Tel: 86-755-2350361 Fax: 86-755-2366086  
San Jose  
China - Hong Kong SAR  
Batiment A - ler Etage  
Microchip Technology Inc.  
2107 North First Street, Suite 590  
San Jose, CA 95131  
Microchip Technology Hongkong Ltd.  
Unit 901-6, Tower 2, Metroplaza  
223 Hing Fong Road  
91300 Massy, France  
Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79  
Germany  
Tel: 408-436-7950 Fax: 408-436-7955  
Kwai Fong, N.T., Hong Kong  
Microchip Technology GmbH  
Steinheilstrasse 10  
Tel: 852-2401-1200 Fax: 852-2401-3431  
Toronto  
6285 Northam Drive, Suite 108  
Mississauga, Ontario L4V 1X5, Canada  
Tel: 905-673-0699 Fax: 905-673-6509  
India  
D-85737 Ismaning, Germany  
Tel: 49-89-627-144 0 Fax: 49-89-627-144-44  
Microchip Technology Inc.  
India Liaison Office  
Italy  
Divyasree Chambers  
Microchip Technology SRL  
Centro Direzionale Colleoni  
Palazzo Taurus 1 V. Le Colleoni 1  
20041 Agrate Brianza  
1 Floor, Wing A (A3/A4)  
No. 11, O’Shaugnessey Road  
Bangalore, 560 025, India  
Tel: 91-80-2290061 Fax: 91-80-2290062  
Milan, Italy  
Tel: 39-039-65791-1 Fax: 39-039-6899883  
United Kingdom  
Microchip Ltd.  
505 Eskdale Road  
Winnersh Triangle  
Wokingham  
Berkshire, England RG41 5TU  
Tel: 44 118 921 5869 Fax: 44-118 921-5820  
08/01/02  
DS21447C-page 28  
2002 Microchip Technology Inc.  

TC647BEUA CAD模型

  • 引脚图

  • 封装焊盘图

  • TC647BEUA 替代型号

    型号 制造商 描述 替代类型 文档
    TC647BEUATR MICROCHIP PWM Fan Speed Controllers With Minimum Fan Sp 类似代替

    TC647BEUA 相关器件

    型号 制造商 描述 价格 文档
    TC647BEUA713 MICROCHIP PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense⑩ Technology for Fault Detection 获取价格
    TC647BEUATR MICROCHIP PWM Fan Speed Controllers With Minimum Fan Speed, Fan Restart and FanSense⑩ Technology for Fault Detection 获取价格
    TC647EOA MICROCHIP PWM Fan Speed Controller with FanSense Technology 获取价格
    TC647EOATR MICROCHIP BRUSHLESS DC MOTOR CONTROLLER, PDSO8, 0.150 INCH, PLASTIC, SOIC-8 获取价格
    TC647EPA MICROCHIP PWM Fan Speed Controller with FanSense Technology 获取价格
    TC647EUA MICROCHIP PWM Fan Speed Controller with FanSense Technology 获取价格
    TC647EUATR MICROCHIP BRUSHLESS DC MOTOR CONTROLLER, PDSO8, PLASTIC, MSOP-8 获取价格
    TC647VOA MICROCHIP PWM Fan Speed Controller with FanSense Technology 获取价格
    TC647VOATR MICROCHIP BRUSHLESS DC MOTOR CONTROLLER, PDSO8, 0.150 INCH, PLASTIC, SOIC-8 获取价格
    TC647VPA MICROCHIP PWM Fan Speed Controller with FanSense Technology 获取价格

    TC647BEUA 相关文章

  • 苹果Apple Intelligence适配百度AI模型遇技术挑战
    2024-12-05
    12
  • 苹果携手亚马逊,定制AI芯片助力Apple Intelligence模型训练
    2024-12-05
    10
  • 革命性突破:光衍射极限下微型步行机器人成功面世
    2024-12-05
    12
  • Soitec将为格罗方德9SW平台供应300mm RF-SOI晶圆
    2024-12-05
    11