AGV8008 Closed Loop Pre-Driver

Applications

Data Servers, PCs
Industrial Fans, Blowers

Datasheet
Product Brief
Development Boards

Features

Precise variable speed control of 4-wire fans
Closed loop, servo controlled RPM
Soft start to reduce inrush current
Current limit & rotor lock protection
Both PWM & voltage control inputs
Integrated Hall amplifier and voltage bias
Available in 16 lead SOIC & QSOP RoHS compliant packages

Description

The AGV8008 is a full featured single phase brushless DC fan/motor pre-driver. Closed loop feedback allows for precise control of the motor's RPM under varying supply and load conditions.

Maximum RPM is programmable via an RC time constant. Precise variable speed is adjusted by varying the duty cycle to the PWM control input pin. Minimum RPM is programmable via a resistor divider to Vref. The analog control pin can be used to interface with a thermistor when the PWM input control is not needed.

Soft start reduces inrush current at power on. Current limit, locked rotor and thermal protections are also provided. The 40V MOS output predrivers can source or sink 100mA.

Closed Loop Product Comparison

The AGV8000 series of closed loop single phase pre-drivers offer a variety of feature combinations to meet different application needs. Product differences are summarized below.