Two Phase BLDC Motor Pre-driver with Speed Control and Minimum Speed Setting

The ZXBM2004 is a two phase, Brushless Direct Current (BLDC) motor control pre-driver with speed control and minimum speed setting suitable for fans, blowers and motors.
For system flexibility the motor speed can be controlled by a voltage signal from either a Thermistor network, external control voltage or a PWM signal. The ZXBM2004 minimizes electromagnetic interference (EMI) by allowing the user to adjust the switch-on speed of the external power switches via a single resistor.

The Diodes Advantage
A reliable high performance pre-driver with an extended feature set for a simple and cost effective solution for two phase fans and motor control applications
■ High source and sink output drive
   High source/sink capability of 80mA/16mA allows external Bipolar or MOSFET switches to be scaled in power for wide range of fan and motor applications
■ Adjustable switch-on speed
   With a single resistor the power switch turn-on speed can be adjusted to help provide the optimum EMI noise performance
■ PWM, DC or Thermistor speed control pin
   Flexible speed control by either an external PWM signal, variable supply voltage or by a resistor-thermistor network
■ Lock detect, shutdown and automatic restart
   Protects coils from over-heating or burning out
■ Wide operating temperature range -40oC to 110oC
   Suitable for thermally demanding applications
■ Small packaging
   U-QFN3030-16 provides a very small low profile solution, over 3.5 times smaller than the QSOP16

APPLICATIONs
■ Cooling fans for desktops PC’s and servers
■ Fans and motors for home appliances
■ Extractor fans
■ Pumps and motors