RT8723

® RT8723 Single-Phase Full-Wave Fan Motor Driver General Description The RT8723 is a single-phase driver IC for fan motors. Rotation speed is controlled by supply voltage modulation and PWM input signal. In the supply voltage control application, the fan speed slope is adjustable by the external voltage input. The RT8723 provides several protection features including the standby mode, thermal shutdown, lock protection, the over-current protection and also the under-voltage protection. In standby and thermal shutdown mode, supply current is less than 100μA. The rotation frequency is generated by FG output. Features z Low Supply Current z PWM Supply Voltage Control Fan Speed z Adjustable Voltage Control Fan Speed z Smart Force Start-Up Function z Built-In Lock Protection z Built-In Thermal Shutdown z Built-In Over-Current Protection z Built-In Frequency Generator with FG Output Signal z Include Hall Bias Circuit z RoHS Compliant and Halogen Free Ordering Information RT8723 Package Type QU : UDFN-10L 3x3 (U-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are : ` RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. ` Suitable for use in SnPb or Pb-free soldering processes. Applications z Single Phase Fan Motor for Notebook or PC Marking Information 2M=YM DNN 2M= : Product Code YMDNN : Date Code Simplified Application Circuit Supply Voltage Optional D1 D2 RT8723 VCC OUT2 C1 PWM Control Signal P...