AM9468-T16-13

AM9468 Green SINGLE PHASE FULL WAVE DIRECT PWM MOTOR DRIVER Description Pin Assignments NEW PRODUCT The AM9468 is a high performance ultra low noise single phase (single-coil) brushless direct current (BLDC) fan and motor driver. The integrated full-bridge driver output stage uses a BTL linear driver architecture to minimize audible switching noise and electromagnetic interference (EMI) providing a low noise solution. (Top View) OUT1 1 16 OUT2 VDD 2 15 RF REGH 3 14 GND 5VREG 4 13 PWM VCONT 5 12 CPWM RMI 6 11 HIN- FG 7 10 HB RD 8 9 HIN+ 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 AM9468 adjusts the output duty cycle. To help protect the motor coil, the AM9468 provides Rotor Lock Protection which shuts down the output drive if rotor lock is detected. The device automatically re-starts when the rotor lock is removed. In case of over voltage, the device shuts down the output drive and enters standby mode to help prevent over voltage stress on the coil. Over temperature shutdown provides thermal protection for the device. A 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. Additionally, a rotor lock detect output is provided by open-drain RD pin. TSSOP-16 The AM9468 is available in power capable low profile TSSOP-16 package. Applications Features       Single-Phase Full Wave BLDC Fan/Motor Drive with BTL Output (BTL Amplifier Gain = 49dB) Low Noise Architecture Wide Operating Voltage Range: 2.4V to 18V PWM Speed Control with External PWM Input DC Voltage Speed Control by Adjusting VCONT and RMI Voltage Hall Bias Output: VHB = 1.25V       Built-in Quick Start Circuit Lock Protection with Automatic Restart Frequency Generator (FG) Output Rotor Lock Detection (RD) Output Current Limit Circuit RF Defines The Current Limit; RF = 1Ω will Achieve 250mA Current Limit    Thermal Shut-Down (TSD) Circuit Lead-Free Finish; RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: • • • • 9V/ 12V / 15V BLDC Cooling Fans and Motors CPU Cooling Fans for Notebooks and Desktop BLDC Fans Instruments Cooling Fans Medium Voltage/ Low Power BLDC Motors 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied. 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