德信 EUTECH

EUM6887 is a motor driver for single coil brushless DC motor. With its high efficient direct PWM control mode, EUM6887 can control the speed of brushless DC motor. It integrates a Hall element with advanced offset cancellation system, a power output H-bridge controlled by sophisticated digital state machine, and all in a single package. And it also integrates PWM control mode, minimum speed mode, adjustable speed slop control mode, soft switch mode, soft start mode, fan tachometer, lock protection, auto restart, Hall element and TSD. PWM mode controls the internal upper side power device in low noise and low vibration. Minimum speed mode can set minimum motor speed by presetting VSP voltage. Adjustable speed slop control mode can set fan speed slop by presetting RCTL voltage. Soft switch mode optimizes low noise performance at different rotation speed with no external components. Soft start mode suppresses high peak start-up current, which will provide a reliable start-up even for low rotation speed. If the motor is stalled by external force or obstacles, overdrive current may incur coil overheat. To prevent this, lock protection circuit can shut down the internal power devices for a few seconds after motor lockup. Then auto restart circuit will try to power up these devices. EUM6887 has FG output.

• ‧Single-phase Full-wave Driver
• ‧Built-in Hall Element
• ‧Wide Input Range 2.8V~16V
• ‧PWM Fan Speed Control
• ‧Programmable Fan Speed Slope
• ‧Programmable Minimum Fan Speed
• ‧Built-in Soft Switching Function
• ‧Lock Protection and Auto Restart
• ‧Fan Rotation Speed Feedback FG Output
• ‧Intelligent Soft Start
• ‧Available in SOP-8 Package
• ‧RoHS Compliant and 100% Lead (Pb)-Free,
• Halogen-Free

• ‧Personal Computer’s Power Supply Radiation and CPU Cooler