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FanControl
Page 2 of 30
DS-FanControl-TDA21801
Contents:
4.1 Block Diagram..................................................................................................................... 7
4.1.1 External Components Recommendation Values........................................................... 7
4.2 Application Circuit.............................................................................................................. 8
4.3 Absolute Maximum Ratings............................................................................................... 9
4.4 Thermal Characteristic ....................................................................................................... 9
4.5 Operating Condition .........................................................................................................10
6.1 Filter and Amplifier parameters ....................................................................................... 11
6.2 Oscillator parameters .......................................................................................................12
6.2.1 Electrical Characteristic
13
6.3 Digital Control parameters............................................................................................... 15
6.3.1 Function of the speed loop
15
6.4 Power Output Stage parameters ..................................................................................... 15
6.4.1 Electrical Characteristic – Power Output Stage
16
6.5 Speed Value Generation parameters .............................................................................. 17
6.6 NTC input .......................................................................................................................... 19
6.6.1 Electrical Characteristic - NTC
19
6.7 FCin Input.......................................................................................................................... 21
6.7.1 Electrical Characteristic - FCin
22
6.8 Under Voltage Lockout Block .......................................................................................... 23
6.8.1 Electrical Characteristic – Undervoltage Lockout 24
1. Features ...................................................................................................................... 4
2. Applications................................................................................................................. 4
3. Pinout and Description .................................................................................................. 4
4. General Description...................................................................................................... 5
6 Application Information ................................................................................................ 11