Transcription of Three-phase brushless DC motor driver STMicroelectronics ...
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Three-phase brushless DC motor driver STMicroelectronics ...
1/39AN1625 APPLICATION NOTEO ctober 20031 INTRODUCTIONFor small- motor applications many appliance designers favor modern three phase brushless DC motors be-cause of the high efficiency (as great as 95%) and small size for a given delivered power. Designers have tohandle control logic, torque and speed control, power-delivery issues and ensure safe operation in every loadcondition. The L6235 is a highly integrated, mixed-signal power IC that allows to easily design a complete motorcontrol system for BLDC motor . Figure 1 shows the L6235 block diagram. The IC integrates six Power DMOS,a centralized logic circuit to decode hall effect sensors and a constant tOFF PWM current control technique (Syn-chronous mode) plus other added features for safe operation and 1.
ICs products. The L6235 is a fully integrated motor driver IC specifically developed to drive a wide range of BLDC motors with Hall effect sensors. This IC is a one-chip cost effective solution that includes several unique circuit design features. These features, including a universal decoding logic that allows
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