AM4961AGSTR-G1

A Product Line of Diodes Incorporated AM4961A SINGLE PHASE FULL WAVE PWM MOTOR DRIVER Description Pin Assignments NEW PRODUCT The AM4961A is highly integrated feature rich single phase Brushless Direct Current (BLDC) full wave motor driver with PWM control function for fans, blowers and extractors. (Top View) For system flexibility the motor speed can be controlled by either an external PWM signal or by a DC voltage or from a Thermistor network. Based on the input signal, the AM4961A adjust the output duty cycle. To help protect the motor coil, the AM4961A provides a rotor lock protection which shuts down the output if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. OUT2 1 16 NC 2 15 OUT1 VCC 3 14 GND VMIN 4 13 CT VPWM 5 12 VREF COSC 6 11 HIN- 7 10 HB 8 9 FG RD HIN+ SSOP-16 (GS Package) To help interface to external system for monitoring the motor status and speed, AM4961A provides open drain Rotor lock detect alarm output (RD) pin and a tachometer output Frequency Generator (FG). The FG output is the magnetic change frequency. (Top View) PGND The AM4961A is available in SSOP-16 and HTSSOP-14 packages. Features • • • • • • • • • • • • • Operating voltage : 3.5V to 16V Internal H-Bridge with 1A Peak Current Capability Speed Control with external PWM, DC or Thermistor signals Minimal Speed Setting Built-in Hall Bias Circuit Reference Voltage Output Rotor Lock Protection with Output Shutdown and Auto Restart Rotation Speed Indication (FG) Rotation or Lock State Indication (RD) Built-in Thermal Shutdown Circuit Industry standard SSOP-16 and Thermally Enhanced HTSSOP-14 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: PGND PGND OUT2 1 14 OUT1 VCC 2 13 GND VMIN 3 12 CT VPWM 4 11 VREF COSC 5 10 HIN- FG 6 9 HB RD 7 8 HIN+ HTSSOP-14 (GH Package) Applications • • • • 12V BLDC Cooling Fans, Motors, Extractors and Blowers CPU Cooler Fan in PC Instrumentation and Equipment Cooling fans Brushless DC Motor Driver 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html 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