ZXBM1021中文资料Turn-on Time and Simple Integrated PWM Speed Control Single Phase BLDC Fan and Motor Pre-Driver with Soft-Start Adjutable Current Limit Adjustable Low Side Switch数据手册Diodes规格书

描述 Description

The  ZXBM1021  is a  high performance and integrated feature rich and simple to use  low noise single phase Brushless DC (BLDC)  motor control pre-driver  for  fans, blowers, extractors and motor drive solutions. 

\t 

\tFor system flexibility the motor speed can be controlled by a DC voltage signal from either external control voltage or a PWM signal. The pre-driver output with source and sink capability of 100mA  to drive external power switch allows  power levels to be adjusted to suite  motor requirements. The device has a supply voltage range of 6.8V to 18V (which can be extended with an external voltage regulator) and the operating ambient temperature range of -40°C to 110°C.

\t 

\tTo simplify system circuit and minimize external components, the device integrates PWM signal integrator, Hall-Effect sensor amplifiers, Hall-bias supply, and voltage reference output. To prevent motor stalling or speed falling below a minimum value in absence of appropriate control signals, ZXBM1021 allows to set the minimum speed.   

\t 

\tTo prevent motor inrush current, the device has a soft start feature. To help protect the motor coil, the ZXBM1021 provides rotor lock protection which shutdown the output drive for a fixed period of time if rotor lock is detected. The device automatically restarts when the rotor lock is removed. The device monitors the motor current to provide a programmable over current limit. 

\t 

\tTo help minimize  electromagnetic interference (EMI) ,  audible switching noise and shoot through challenges, ZXBM1021 provides a V+OP pin for low side drive outputs which allows to adjust  the current into the base of external power transistors or to control external power MOSFETs’  turn-on speed different to turn-off speed. 

\t 

\t 

\tA tachometer output is provided by open-drain Frequency Generator (FG) Pin which allows external interface to monitor motor rotation or speed.  The FG output is the magnetic change frequency. 

\t 

\tThe ZXBM1021 is available in thermally capable space saving low profile U-QFN4040-20 and industry standard QSOP-20 packages.

特性 Features

Operating Voltage: 6.8V to 18V
\t\t
\t\t\t
\t\t\t\tCan be extended with external regulator
\t\t
\t
\t
\t\tSpeed control via external PWM, DC or Thermistor signals
\t\t
\t\t\t
\t\t\t\tInternal PWM Integrator
\t\t
\t
\t
\t\tLow noise, high efficiency
\t
\t\tSoft start
\t
\t\tIntegrated current control
\t
\t\tReference voltage output
\t
\t\tBuilt-in Hall amplifier for direct connection of Hall element
\t
\t\tRotor Lock Protection
\t
\t\tLock detection, output shutdown and automatic re-start
\t
\t\tMinimum speed setting
\t
\t\tFrequency generator (FG) output
\t
\t\tThermally enhanced space saving low profile U-QFN4040-20 package and industry standard QSOP-2 packages
\t
\t\tTotally Lead-Free & Fully RoHS Compliant 
\t
\t\tHalogen and Antimony Free. “Green” Device

应用 Application

12V/ 24V and 48V cooling fans, pumps and motors
\t
\t\tPersonal, server and mainframe computer cooling fans
\t
\t\tInstrumnetation and equipment cooling fans
\t
\t\tCooling systems and motor control in home appliances
\t
\t\tCentral heating blowers and extraction systems
\t
\t\tIndustrial fans, blowers and extractors
\t
\t\tHand-held Power tools
\t
\t\tHand dryer BLDC motors
\t
\t\tPumps