This file introduces the features of TC650/TC651, including integrated temperature sensor and multi-speed fan control, built-in over temperature alert(TOVER), temperature proportional fan speed control, pulse width modulation output drive, solid-state temperature sensing, ±1°C(typical) accuracy etc.
The TC650/TC651 are integrated temperature sensors and brushless DC fan speed controllers designed for thermal protection in electronic equipment such as personal computers, set-top boxes, and projectors. They measure junction temperature and control fan speed proportionally to reduce acoustic noise and extend fan life.
These devices feature solid-state sensing with a typical accuracy of +1°C from 25°C to +70°C. The TC650 offers multi-speed fan control ranging from 40% to 100%, while the TC651 includes an auto-fan shutdown function for power savings when temperatures are low. Both models include a built-in over-temperature alert (TOVER) that triggers at a set point plus 10°C.
| Supply Voltage Range | 2.8V — 5.5V |
|---|---|
| Operating Temperature Range | -40°C to +125°C |
| Temperature Accuracy | +1°C (Typical) |
| Supply Current | 50uA (Typical) |
| PWM Frequency | 15 Hz |
The device has a typical accuracy of +1°C from 25°C to +70°C.
Yes, the TC651 includes an auto fan shutdown function for additional power savings when temperatures are below the factory set point.
The TOVER pin goes low when the temperature exceeds the set point by 10°C, indicating a potential system overheating condition.