Deep-Dive with AI
Search across all available documentation for this part.
Deep-Dive with AI
Technical Specifications
Parameters and characteristics for this part
| Specification | TC655EUNTR |
|---|---|
| Applications | Fan Controller |
| Function | Controller - Speed |
| Interface | I2C |
| Motor Type - AC, DC | Brushless DC (BLDC) |
| Mounting Type | Surface Mount |
| Operating Temperature [Max] | 85 °C |
| Operating Temperature [Min] | -40 °C |
| Output Configuration | Pre-Driver - Low Side (2) |
| Package / Case | 10-MSOP, 10-TFSOP |
| Package / Case [x] | 3 mm |
| Package / Case [x] | 0.118 in |
| Supplier Device Package | 10-MSOP |
| Voltage - Supply [Max] | 5.5 V |
| Voltage - Supply [Min] | 3 V |
Pricing
Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly
| Distributor | Package | Quantity | $ | |
|---|---|---|---|---|
| Digikey | Tape & Reel (TR) | 2500 | $ 2.13 | |
| Microchip Direct | T/R | 1 | $ 2.83 | |
| 25 | $ 2.36 | |||
| 100 | $ 2.13 | |||
| 1000 | $ 2.06 | |||
| 5000 | $ 2.04 | |||
Description
General part information
TC655 Series
The TC655 is a dual PWM mode fan speed controller with FanSense™ TM technology for use with brush-less DC motors. The device allows temperature proportional speed control and therefore accomplishes lower acoustic fan noise and longer fan life. The TC655 reads the voltage provided by an external ther-mistor (or voltage output temperature sensor) and adjusts a 30% to 100% PWM duty cycle output to the fan with respect to the input temperature voltage. The PWM duty cycle can also be programmed via SMBus to allow fan speed control without the need of an external thermistor.
In normal fan operation, pulse trains are present at the SENSE pin. These pulses are used to calculate the fan RPM. The fan RPM data is used to detect a worn out, stalled, open or unconnected fan. An RPM level below the user-programmable threshold causes the TC655 to assert a logic low alert signal (FAULT). Thedefault value is 500RPM. The TC655 consumes only 0.3mA during operation and can also enter a low-power shutdown mode by setting the appropriate bit in the configuration register.
Documents
Technical documentation and resources