TC642EV Microchip Technology, TC642EV Datasheet - Page 10

• Manufacturer Part Number: TC642EV
• Description: KIT EVALUATION FOR TC642
• Manufacturer: Microchip Technology

Specifications of TC642EV

• Processor To Be Evaluated: TC642 and TC646
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: Q698359

TC64X/TC64XB Fan Control Evaluation Board User’s Guide
DS21403C-page 6
The output drive device can be either a SOT-23, TO-92 or a TO-220 transistor/
MOSFET, depending on the fan operating current and application. Resistor R
base drive current for this transistor. The configuration, as shipped from the factory,
consists of a 2N2222A transistor and a 1.1 k base resistor, which will drive a BDC fan
with an operating current of 100 mA or less. Larger fans can be driven with a different
combination of base resistor and output transistor. Fan commutation pulses are sensed
by pin 5 of the TC64X and TC64XB devices through R
suggested values for R
Evaluation Kit is shipped from the factory with a 4.7
0.1 µF capacitor installed for C
A fault visual indicator is also provided to facilitate experimentation. The FAULT LED is
driven active by Q
low. The various jumper blocks and options are summarized in Table 2-1.
TABLE 2-1:
Jumper
Block
JB
JB
JB
JB
1
2
3
4
Shorting Block
2 to TC642
2 to TC646
Installed
1 to 2
3 to 4
1 to 2
3 to 4
1 to 2
3 to 4
TC64X/TC64XB EVALUATION BOARD JUMPER OPTIONS
4
whenever the FAULT output of the TC64X/TC64XB device goes
3
for various fan current ratings. The TC64X/TC64XB
TC64X/TC64XB, 30 Hz timebase enabled.
TC64X/TC64XB timebase determined by
user-installed capacitor C
4.7 sense resistor selected.
User-installed sense resistor R
0.1 µF sense capacitor selected
(adequate for nearly all BDC fans).
User-installed sense capacitor C
TC64X/TC64XB Fan Control Evaluation Board
configured for TC642/2B, TC647/7B.
TC64X/TC64XB Fan Control Evaluation Board
configured for TC646/6B, TC648/8B, TC649/9B.
5
.
Function
2
.
resistor installed for R
4
3
selected.
4
and C
selected.
2003 Microchip Technology Inc.
5
. Table 2-2 shows
3
2
Factory
Shorted
Shorted
Shorted
Shorted
Setting
sets the
and a
Open
Open
Open
Open