參數(shù)資料
型號(hào)： TC649VUA
元件分類： 運(yùn)動(dòng)控制電子
英文描述： BRUSHLESS DC MOTOR CONTROLLER, PDSO8
封裝： PLASTIC, MSOP-8
文件頁(yè)數(shù)： 28/28頁(yè)
文件大?。?/td> 478K
代理商： TC649VUA
2002 Microchip Technology Inc.
DS21449C-page 9
TC649
5.0
TYPICAL APPLICATIONS
Designing with the TC649 involves the following:
(1) The temperature sensor network must be
configured to deliver 1.25V to 2.65V on VIN for 0%
to 100% of the temperature range to be regulated.
(2) The auto-shutdown temperature must be set
with a voltage divider on VAS.
(3) The output drive transistor and associated circuitry
must be selected.
(4) The SENSE network, RSENSE and CSENSE, must
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.
The TC642 demonstration and prototyping board
(TC642DEMO) and the TC642
Evaluation
Kit
(TC642EV) provide working examples of TC649 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 TC649 should consult the documen-
tation for both TC642EV (DS21403) and TC642DEMO
(DS21401).Figure 5-1 shows the base schematic for
the TC642DEMO.
FIGURE 5-1:
Typical Application Circuit.
FAULT
SENSE
NTC
R1
R2
R3
R4
GND
*See cautions regarding Latch-up Considerations in Section 5.0, "Typical Applications".
**Optional. See Section 5.0, "Typical Applications" for details.
Notes:
Fan Fault
Shutdown
Shutdown**
Q1
+12V
+5V*
VDD
VIN
VAS
VOUT
RBASE
RSENSE
CSENSE
CF
1 F
CF
TC649
Fan
CB
0.01 F
CB
0.01 F
CB
1 F
+
+5V
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