AH9485/86 SINGLE PHASE LOW NOISE SMART MOTOR DRIVER Description Pin Assignments The AH9485 and AH9486 are single chip solutions for driving a single phase (coil) brushless DC motors. It integrates the motor driver and the high sensitivity Hall effect sensor to simplify the system circuit and PCB design for simpler solutions. (Top View) Pin 1 Mark NEW PRODUCT Rotor lock-detect, shutdown and auto-restart functions help to prevent the motor from over-heating when rotor is locked and restarts the motor after the lock is removed. The AH9485 and AH9486 have built-in open drain tachometer frequency generator (FG) and rotation detection (RD) outputs to allow external interface to monitor motor rotation, speed or rotor locks conditions easily. The FG provides magnetic change frequency while the RD provides the rotor status. The full bridge output stage uses “soft-switching” technique to minimize the audible switching noise (vibration and acoustic noise) and electromagnetic interference (EMI) providing a low noise solution. FG/RD 1 6 VDD GND 2 5 PWM OUT1 3 4 OUT2 TSOT26F Over-temperature shutdown provides thermal protection for the device. An external DC voltage or a PWM (pulse-width modulation) signal on the PWM pin can be used to control the motor speed. The AH9485 and AH9486 are packaged in TSOT26F. Applications Features Internal Full Bridge Driver High Sensitivity Integrated Hall Sensor Low and Wide Supply Voltage Range of 2V to 6V Soft Switching for Low Noise Rotor Lock Protection and Auto-Restart DC Voltage or PWM Signal Speed Control Thermal Protection Tachometer FG Output(AH9485) or Rotor Lock Alarm RD Output (AH9486) Operating Temperature Range of -40ºC to +105ºC Flat Pin TSOT26F Package Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: 5V Low Noise BLDC Cooling Fans Low Voltage / Low Power BLDC Motors Notebook / VGA DC Fans / Blowers Micro-Motors 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 <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AH9485/86 Document number: DS38108 Rev. 1 - 2 1 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Typical Applications Circuit (Note 4) R3 VPWM Schottky Diode 0.2V 1KW VDD VDD NEW PRODUCT C1 2.2mF/5.5V PWM ZD1 5.5V R1 4.7W OUT2 D1 5 6 4 AH9485/86 R4 3 OUT1 10KW FG/RD 2 GND 5V FG/RD 1 R2 39W Note 4: Must use C1 capacitor for the decoupling between VDD and GND and place the capacitor as close to the IC as possible. ZD1: VDD over-voltage stress protection diode. R2: current limit resistor for Open Drain RD output. R3: de-coupling resistor for long-distance signal transmission. Pin Descriptions Pin Number Pin Name 1 FG/RD 2 GND Ground pin 3 OUT1 Output pin 1 4 OUT2 Output pin 2 5 PWM DC voltage or Pulse width modulation signal speed control pin 6 VDD AH9485/86 Document number: DS38108 Rev. 1 - 2 Function FG(AH9485) or RD(AH9486) Power supply pin 2 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Functional Block Diagram PWM VDD 5 Bias Generator 6 PWM Control NEW PRODUCT 3 Hall Plate Chopper Amplifier Digital Control Logic Hysteresis Comp Soft-Switch & Output Driver VDD 4 Power On Reset Oscillator Thermal Shutdown Protection 1 FG/RD AH9485/86 Document number: DS38108 Rev. 1 - 2 3 of 12 www.diodes.com OUT1 OUT2 2 GND September 2015 © Diodes Incorporated AH9485/86 Absolute Maximum Ratings (Notes 5 and 6) (@TA=+25°C, unless otherwise specified.) NEW PRODUCT Symbol Parameter VDD Supply Voltage IOUTP Rating Unit 7 V Peak Output Current 500 mA IOUTC Continuous Output Current 300 mA VFG/RD FG/RD Pull-up Voltage 7 or VDD V IFG/RD FG/RD Current 20 mA PD Power Dissipation 520 mW JA Thermal Resistance ( Junction to Ambient) 141 ºC/W -55 to +150 ºC 2000 V TSTG Storage Temperature ESD ESD (Human Body Model) (Note 7) 5. Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Note: 6. The absolute maximum VDD of 7V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the device at the absolute maximum rated conditions for any period of time. 7. Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. Recommended Operating Conditions Symbol Parameter VDD Supply Voltage TA Ambient Temperature Electrical Characteristics Symbol Min Max Unit 2 6 V -40 +105 ºC (@VDD = 5V, TA=+25°C, unless otherwise specified.) Min Typ Max Unit Supply Current – – 1.8 3 mA RDSON1 ON Resistance (RPMOS+RNMOS) IOUT = 300mA – 2 – Ω RDSON2 OUT1, OUT2 ON Resistance TJ = +125ºC, IOUT = 300mA – 3 – Ω VOL FG/RD Output Low Voltage IOL = 10mA – 0.33 0.5 V ILEAK FG/RD Output Leakage Current VFG(VRD) = 5V – 0.15 10 μA – – 0.25 – s – – 1.5 – s – >0.5×VDD – VDD V – 0 – <0.14×VDD V IDD Parameter tON Locked Rotor Period tOFF PWMHIGH PWM Voltage Range PWMLOW AH9485/86 Document number: DS38108 Rev. 1 - 2 Conditions 4 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Magnetic Characteristics (@VDD =5V, TA=+25°C, unless otherwise specified.) NEW PRODUCT Symbol Parameter Min Typ Max Unit BOP Operating Point 0 25 50 Gauss BRP Releasing Point -50 -25 0 Gauss BHYS Hysteresis – 50 – Gauss Magnetic Hysteresis Characteristics OUT1 (V) -25 0 OUT2 (V) 25 0 25 -25 Magnetic (Gauss) Magnetic (Gauss) OUT1 Output vs. Magnetism OUT2 Output vs. Magnetism Output Waveforms Description (Notes 8 and 9) VDD Re-Start Time Shutdown Time tON tOFF OUT1, OUT2 FG The voltage level depends on OUT1 pin’s voltage level before lock-shutdown RD Notes: 8. RD and FG are open drain outputs and the high level of the signal depends on the external supply voltage. 9. The on torque time of motor is same as the re-start time. AH9485/86 Document number: DS38108 Rev. 1 - 2 5 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Test Circuit R3 VPWM 1KW C1 2.2mF 5 6 OUT2 PWM VDD R1 4.7W 4 RL AH9485/86 2 3 OUT1 R2 5V FG/RD 1 GND NEW PRODUCT 5V 10KW AH9485/86 Document number: DS38108 Rev. 1 - 2 6 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Application Note (Notes 10, 11 and 12) DC Supply Voltage Speed Control Motor speed can be controlled by varying the VDD supply voltage while PWM pin is tied to VDD pin. NEW PRODUCT PWM Pin Speed Control PWM (pulse width modulation) pin can be used to control the motor speed. There are two types of speed control using PWM pin: a) DC Voltage Mode b) Pulse Width Mode a) DC Voltage Mode PWM: DC voltage signal (VPWM) on the PWM pin can be used to control the motor speed. Applying a DC voltage to the PWM pin will generate an internal PWM pulses with the “ON” duty cycle based on the applied DC voltage according to the diagram below. The internal duty ratio generated will change from 0% duty at VPWM = 0.14VDD typically to 100% at VPWM = 0.5VDD. “ON”Ratio 100% 0% 0.14VDD Notes: 0.5VDD 10. While using pulse mode PWM, the “High” value of the input pulse should be higher than 0.5×VDD and the “Low” value should be lower than 0.14×VDD. 11. The lower-limit for the PWM pulse frequency is 200Hz, and the recommended frequency range is higher than 30kHz where the PWM input pulses will not generate acoustic noise. 12. The “PWM” pin contains an internal pull-up resistor, so the AH9485/86 will rotate at full-speed (100% ON) when this pin is left un-connected (floating). b) Pulse Mode PWM: External PWM pulses can be applied directly to the PWM pin to control the speed. The AH9485/86 will pass this pulse to the coil driver with the original duty-cycle ratio. While using pulse mode PWM, the “High” value of the input pulse should be higher than 0.5×VDD and the “Low” value should be lower than 0.14×VDD. The lower-limit for the PWM pulse frequency is 200Hz, and the recommended frequency range is higher than 30kHz to help prevent acoustic noise related to the switching. Soft Switching AH9485/86 use soft switching of the motor coil current during commutation to minimize audible switching noise and electromagnetic Interference (EMI) to provide a low noise solution. AH9485/86 Document number: DS38108 Rev. 1 - 2 7 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Performance Characteristics Supply Current IDD vs. Supply Voltage VDD Supply Current IDD vs. Operating Temperature TA 2.4 5 2.3 4 2.2 IDD (mA) IDD (mA) 2.1 2 2.0 1 VDD=5V 1.9 0 1 2 3 4 5 No MAGN Have MAGN 1.8 -50 0 6 -25 0 25 50 75 100 125 150 O TA ( C) VDD (V) Operating Switch Points BOP, BRP & BHYS vs. Supply Voltage VDD Operating Switch Points BOP, BRP & BHYS vs. Operating Temperature TA 60 BOP/BRP/BHYS (GS) BOP/BRP/BHYS (GS) 40 20 TA=25C BOP BRP 0 40 20 VDD=5V BOP BRP 0 BHYS BHYS -20 -20 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 -50 -25 0 25 VDD (V) 50 75 100 125 O TA ( C) High+Low Side RDS(ON) vs. Supply Voltage VDD High+Low Side RDS(ON) vs. Operating Temperature TA 1.60 TA= 25C 2.5 1.55 IOUT=300mA VDD=5V IO=300mA RDS(ON) (W) 1.50 RDS(ON) (W) NEW PRODUCT 3 2.0 1.45 1.40 1.5 1.35 1.30 1.0 2.0 2.5 3.0 3.5 4.0 4.5 -50 5.0 AH9485/86 Document number: DS38108 Rev. 1 - 2 -25 0 25 50 75 100 125 T A ( C) O VDD (V) 8 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Ordering Information Product Version Package Packing 5: AH9485 6: AH9486 WUF: TSOT26F 7: 7" Tape & Reel 7” Tape and Reel Part Number Package Code Packaging Quantity Part Number Suffix AH9485-WUF-7 WUF TSOT26F 3000/Tape & Reel -7 AH9486-WUF-7 WUF TSOT26F 3000/Tape & Reel -7 Marking Information (Top View) 5 6 4 7 NEW PRODUCT AH948X – XXX – X XX Y W X 1 AH9485/86 Document number: DS38108 Rev. 1 - 2 2 3 XX : Identification Code Y : Year 0~9 W : Week : A~Z : 1~26 Week; a~z : 27~52 Week; z Represents 52 and 53 Week X : Internal Code Part Number Package Identification Code AH9485-WUF-7 TSOT26F H5 AH9486-WUF-7 TSOT26F H6 9 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Package Outline Dimensions (All dimensions in mm.) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. (1) Package Type: TSOT26F D E1 E SEE VIEW C e b c e1 0 (4x) VIEW C A2a A2b L Min Max Typ A 0.700 0.800 0.750 A2a 0.325 0.375 0.350 A2b 0.375 0.425 0.400 b 0.425 0.475 0.450 c 0.150 0.200 0.175 D 2.850 2.950 2.900 E 3.750 3.850 3.800 E1 1.550 1.650 1.600 e 0.950 BSC e1 1.900 BSC L 1.100 BSC 4° 12° 10° θ All Dimensions in mm A 0 (4x) Min/Max(in mm) 1.1/1.3 PART MARKING SURFACE 0.85/1.05 Hall Sensor 0.45/0.55 Die 0.7/0.8 NEW PRODUCT TSOT26F Dim PIN1 Sensor Location AH9485/86 Document number: DS38108 Rev. 1 - 2 10 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 Mechanical Structure Rotor NEW PRODUCT Magnet Rotor Height h1 h2 Vertical Height PCB PCB Thickness h3 PCB h4 Soldering Thickness IC Ink View Suggested Pad Layout Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. (1) Package Type: TSOT26F X C Y Dimensions C X X1 Y Y1 Y1 Value (in mm) 0.950 0.700 2.600 1.000 4.220 X1 AH9485/86 Document number: DS38108 Rev. 1 - 2 11 of 12 www.diodes.com September 2015 © Diodes Incorporated AH9485/86 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). NEW PRODUCT Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. 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Copyright © 2015, Diodes Incorporated www.diodes.com AH9485/86 Document number: DS38108 Rev. 1 - 2 12 of 12 www.diodes.com September 2015 © Diodes Incorporated