TDA21801XUMA1
TDA21801XUMA1 Datasheet
DS-FanControl-TDA21801
| Part | Datasheet |
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TDA21801XUMA1 |
TDA21801XUMA1 (pdf) |
| Related Parts | Information |
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TDA21801 |
TDA21801 |
| PDF Datasheet Preview |
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| Version May 2005 Datasheet DS-FanControl-TDA21801 TDA21801 Authors: E. Chang 1 G. Bernacchia 2 N. Florio 2 R. Pittassi 2 G. Capodivacca 2 Published by Infineon Technologies AG 1 Villach, Infineon Technologies Austria AG 2 Padova, Infineon Technologies Italia S.r.l. Power Management & Drive FanControl N e v e r s t o p t h i n k i n g. Page 1 of 30 DS-FanControl-TDA21801 Contents: Features 4 Pinout and Description 4 General 5 Block 7 External Components Recommendation 7 Application 8 Absolute Maximum 9 Thermal Characteristic 9 Operating Condition 10 6 Application Information 11 Filter and Amplifier parameters 11 Oscillator parameters 12 Electrical Characteristic 13 Digital Control 15 Function of the speed loop Power Output Stage parameters 15 Electrical Characteristic Power Output Stage 16 Speed Value Generation parameters 17 NTC input 19 Electrical Characteristic - NTC 19 FCin 21 Electrical Characteristic - FCin 22 Under Voltage Lockout Block 23 Electrical Characteristic Undervoltage Lockout 24 FanControl Page 2 of 30 DS-FanControl-TDA21801 FanM 25 Electrical Characteristic FanM Signal 25 Outline Dimension 27 Footprint Drawing 27 Ordering Code Q67042-S4257 Pinout and Description TOP VIEW FCin 1 RSin 2 TRSOUT 3 GND 4 TDA21801 8 VDD 7 NTC 6 FanM 5 RC-VCO N° Name FCin Analog input for external speed control RSin Sense-resistor input signal TRSOUT Output to drive the external PNP transistor GND Ground RC-VCO adjustment for minimum minimal frequency and OTP-psu-shut-down. FanM OTP-early warning and OTP-psu-shut-down warning. NTC Analog input for temperature sensor NTC divider VDD Supply voltage FanControl Page 4 of 30 DS-FanControl-TDA21801 fvco = 16 * n * P 15 n = Fan speed in rpm. P =number of pole Fans in use for desktop PC SMPS are normally 4 poles . FanControl Page 5 of 30 DS-FanControl-TDA21801 n max = 4540 rpm n min = 1329 rpm Fig.1 Fan Speed rpm vs. Temperature Consider only the typical curve blue line FanControl Page 6 of 30 DS-FanControl-TDA21801 Block Diagram 12V VDD RBIAS 3 TRSOUT FCin 1 NTC 7 RNTC RSin 2 RRSin BIAS Fan M |
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