参数资料
型号: TC642BEOA713
元件分类: 运动控制电子
英文描述: BRUSHLESS DC MOTOR CONTROLLER, PDSO8
封装: 0.150 INCH, PLASTIC, SOIC-8
文件页数: 18/34页
文件大小: 683K
代理商: TC642BEOA713
2003 Microchip Technology Inc.
DS21756B-page 25
TC642B/TC647B
FIGURE 5-13:
Design Example Schematic.
Bypass capacitor CVDD is added to the design to
decouple the bias voltage. This is good to have, espe-
cially when using a MOSFET as the drive device. This
helps to give a localized low-impedance source for the
current required to charge the gate capacitance of Q1.
Two other bypass capacitors, labeled as CB, were also
added to decouple the VIN and VMIN nodes. These
were added simply to remove any noise present that
might cause false triggerings or PWM jitter. R5 is the
pull-up resistor for the FAULT output. The value for this
resistor is system-dependent.
FAULT
SENSE
R1
R2
R3
32.4 k
R4
GND
Q1
+12V
+5V
VDD
VIN
VMIN
VOUT
RSENSE
CSENSE
CF
1.0 F
CF
TC647B
Fan
CB
0.01 F
CB
0.01 F
+
4
5
7
6
8
1
3
2
+5V
17.8 k
237 k
45.3 k
R5
10 k
0.1 F
SI2302
or
MGSF1N02E
Panasonic
12V, 140 mA
FBA06T12H
Thermometrics
100 k
@25°C
NHQ104B425R5
CVDD
1.0 F
3.0
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