Freescale Semiconductor
23
Variable Speed DC Fan Control using the MC9RS08KA2, Rev. 0
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| 5V |
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| P1 |
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| R1 | 220 |
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| 1 | 12V_IN |
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12V |
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| 2 |
| 1 |
| 2 |
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GND |
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| 1 |
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| 1 |
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| Z1 | C6 |
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| ZMM5231B | 1uF/10V |
| 2 |
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| 2 |
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| 12V |
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| 1 |
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| GND |
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| D1 |
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| 1 | 2 |
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| LL4148 |
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| 1 |
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C2 |
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2u2F/25V | 2 |
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| 3 |
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| R6 |
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| Q2 | 1 |
| 1 | 2 |
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| 5V |
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| GND |
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| 1K5 |
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| 1 |
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| 1 |
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| 2 | FMMT491A |
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| LL4148 | D2 |
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| C4 |
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| 1 | 2u2F/25V |
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| 12V | 2 |
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| 2 |
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| R2 |
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| 10K |
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P3 |
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| 2 |
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| 5V |
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1 | 12V |
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| GND |
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COM |
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2 | L1 |
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L1 |
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3 | L2 |
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L2 |
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4 | GND |
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GND |
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5 | HALL |
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HALL |
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BLDC FAN CONNECTOR |
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| 1 |
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| GND |
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| DC1 |
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| U1 |
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| HALL | 1 |
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| 0.1uF | PA2/K2/RST | PA0/K0/A+ |
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| BUZZER | 2 | 7 | SENSOR | |||
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| 2 | PA3/AO/BKGD | PA1/K1/A- | ||||
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| 5V | 3 | 6 | OUT2 | |||
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| VDD | PA4/K4 | ||||
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| GND | 4 | 5 | OUT1 | ||
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| VSS | PA5/K5 | ||||
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| 9RS08KA2DN |
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| 3 |
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| R7 | GND |
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| Q1 | 1 |
| 1 | 2 |
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| 1K5 |
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| 1 |
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| 1 | 2 | FMMT491A |
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| C3 |
| LL4148 | D3 |
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| HALL | 2 | BKGD |
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| BUZZER | 1 | P4 |
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| 2u2F/25V |
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| GND | 3 | VPP |
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| 2 |
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| GND |
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| 5V | 4 |
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| 5V |
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| ICP CONNECTOR |
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| GND |
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| 12V |
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| 1 | BUZ1 |
| 2 | |
| 3 |
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R8 |
| Q3 |
2 | 1 |
1K5 | NDS7002A | |
2 | ||
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GND
5V
1
R10
4K7(1%)
2
1
C7
22nF
2
GND
5V
1
R9
7.5K(1%)
2
| 1 |
VR1 | 2 |
10K | |
SPEED CONTROL |
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GND
Appendix A.
Schematic
Temperature Sensor Measurement