ZXBM1021JB20TC

NOT RECOMMENDED FOR NEW DESIGN CONTACT US ZXBM1021 SINGLE PHASE VARIABLE SPEED MOTOR CONTROL PRE-DRIVER Pin Assignments The DIODES™ ZXBM1021 is a high performance, low noise, singlephase, Direct Current Brushless (BLDC) motor pre-driver with variable PWM speed control and current control suitable for fan and blower motors. For system flexibility, the motor speed can be controlled by either an external PWM control signal or by a DC voltage signal from an external control voltage or from a Thermistor network. HBIAS 15 ZXBM1021 PWMSPD SetThRef 5    Notes: SetTh FG GND CLCK 6 SMIN QSOP-20 Vcc Features    Sense 10 11 Top View The ZXBM1021 is available in space saving and low profile U-QFN4040-20 and industry standard QSOP-20 packages.        Ph1Hi SPD CSPD Ph1Lo Ph2Lo A Tachometer output is provided by the open collector output Frequency Generator (FG) pin which allows external interface to monitor motor rotation or speed. The FG output is the magnetic change frequency. Operating Voltage: 6.8V to 18V  Can be Extended with External Regulator Speed Control via External PWM, DC or Thermistor Signals Low Noise, High Efficiency Soft Start Integrated Current Control Reference Voltage Output Built-in Hall Amplifier for Direct Connection of Hall Element Rotor Lock Protection  Lock Detection, Output Shutdown and Automatic Restart Minimum Speed Setting Frequency Generator (FG) Output Thermally Enhanced Space Saving Low Profile U-QFN4040-20 and Industry Standard QSOP-20 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/ 16 1 ThRef To prevent motor inrush current, the device has a soft start feature. To help protect the motor coil, the ZXBM1021 provides rotor lock protection which shuts down the output drive if rotor lock is detected. The device automatically re-starts with soft-start when the rotor lock is removed. The ZXBM1021 monitors the motor current to provide a programmable over current limit.  Ph2Hi V+OP VCC 20 H- U-QFN4040-20 H+ Description 1 20 V+OP H+ Ph2Hi H- Ph1Lo HBIAS Ph2Lo ThRef Ph1Hi ZXBM1021 SetThRef PWMSPD Sense SPD CSPD SetTh SMIN FG CLCK 11 10 GND Top View Applications         Personal, servers and mainframe computers cooling fans Instrumentation and equipment cooling fans Home appliance fans and blowers Central heating blowers and extraction systems Industrial fans, blowers and extractors Hand dryers Hand-held power tools Pumps 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain