View MTD6502B_5055670.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

MTD6502B
5V 3-Phase BLDC Sinusoidal Sensorless Fan Motor Driver
Features:
* Position Sensorless BLDC Drivers (No Hall Sensor Required) * 180 Sinusoidal Drive, for High Efficiency and Low Acoustic Noise * Support 2V to 5.5V Power Supplies * Direction Control: - Forward direction: connect DIR pin to GND or leave floating - Reverse direction: connect DIR pin to VDD * Speed Control through Power Supply Modulation (PSM) and/or Pulse-Width Modulation (PWM) * Built-in Frequency Generator (FG Output Signal) * Built-in Lock-up Protection and Automatic Recovery Circuit (External Capacitor not Necessary) * Built-in Over Current Limitation * Built-in Thermal Shutdown Protection * No External Tuning Required * Available Packages: - 3 mm x 3 mm TDFN-10
Description:
The MTD6502B device is a 3-phase full-wave driver for brushless sensorless DC motors. It features 180 sinusoidal drive, high torque output and silent drive. With adaptive features, parameters and a wide range of power-supplies (2V to 5.5V), the MTD6502B device is intended to cover a wide range of motor characteristics, while requiring minimum external components. Speed control can be achieved through either power supply modulation or pulse-width modulation (using the PWM digital input pin). With the compact packaging and minimum bill-ofmaterial (integrated power transistors, no Hall sensor, no external tuning), the MTD6502B is best suited for low-cost fan applications requiring high efficiency and low acoustic noise, such as notebook CPU cooling fans. Frequency generator (FG) output enables the precision speed control in closed-loop applications. The MTD6502B driver includes a lock-up protection mode, which turns off the output current when the motor is under lock condition, and an automatic recovery that enables the fan to run when the lock condition is removed. The motor overcurrent limitation and thermal-shutdown protection are included for safetyenhanced operations. The MTD6502B is available in a compact thermallyenhanced 3 mm x 3 mm TDFN package.
Applications:
* Notebook CPU Cooling Fans * 5V 3-Phase Brushless DC Motors
Package Types
MTD6502B 3x3 TDFN*
FG 1 GND 2 VDD 3 OUT1 4 OUT2 5 EP 11 10 PWM 9 DIR 8 VCC 7 OUT3 6 GND
* Includes Exposed Thermal Pad (EP); see Table 2-1.
2011 Microchip Technology Inc.
DS25003A-page 1
MTD6502B
Functional Block Diagram
VCC VREF Motor Phase Detection Circuit
VDD
Regulator Over-current protection VCC
FG
Soft Switching Drive
VCC PWM Controller
Output Drive Circuit
OUT3 OUT2 OUT1
DIR
GND Thermal protection Short-circuit protection
DS25003A-page 2
2011 Microchip Technology Inc.
MTD6502B
Typical Application
MCU Side (Vlogic) R1
1 2 3
PWM Input (1-100 kHz)
FG
PWM
10 9 8 7 6
VDD OUT1 OUT2
MTD6502B
GND
DIR VCC OUT3 GND
VCC
C1
4 5
C2
Recommended External Components for Typical Application Element C1 C2 R1 Type/Value 1 F 1 F 10 k Comment Connect as close as possible to IC input pins Connect as close as possible to IC input pins Connect to Vlogic on microcontroller side
2011 Microchip Technology Inc.
DS25003A-page 3
MTD6502B
NOTES:
DS25003A-page 4
2011 Microchip Technology Inc.
MTD6502B
1.0 ELECTRICAL CHARACTERISTICS
Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.
Absolute Maximum Ratings
Power Supply Voltage (VCC_MAX) ...................... -0.7 to +7.0V Maximum Output Voltage (VOUT_MAX) ............... -0.7 to +7.0V Maximum Output Current(2) (IOUT_MAX) ....................1000 mA FG Maximum Output Voltage (VFG_MAX) ........... -0.7 to +7.0V FG Maximum Output Current (IFG_MAX).....................5.0 mA VDD Maximum Voltage (VDD_MAX) ..................... -0.7 to +4.0V PWM Maximum Voltage (VPWM_MAX) ................ -0.7 to +7.0V Allowable Power Dissipation(2)(PD_MAX).........................1.5W Maximum Junction Temperature (TJ) .......................... +150C
Note 1: Reference PCB, according to JEDEC standard EIA/JESD 51-9. 2: IOUT is also internally limited, according to limits defined in the Electrical Characteristics.
ELECTRICAL CHARACTERISTICS
Electrical Specifications: Unless otherwise specified, all limits are established for TA = +25C Parameters Power Supply Voltage Power Supply Current OUTx High Resistance OUTx Low Resistance OUTx Total Resistance VDD Output Voltage PWM Input Frequency PWM Input H Level PWM Input L Level PWM Internal Pull-Up Current DIR Internal Pull-Down Current FG Output Pin Low Level Voltage FG Output Pin Leakage Current Lock Protection Operating Time Lock Protection Waiting Time Overcurrent Protection Thermal Shutdown Thermal Shutdown Hysteresis Sym VCC IVCC RON(H) RON(L) RON(H+L) VDD fPWM VPWM_H VPWM_L IPWM_L IDIR VOL_FG ILH_FG TRUN TWAIT IOC_MOT TSD TSD_HYS Min 2 -- -- -- -- -- -- 1 0.8*VCC 0 -- -- -- -- -- 4.5 -- -- -- Typ -- 50 0.75 0.75 1.5 3 VCC - 0.2 -- -- -- -- 20 -- -- 0.5 5 750 170 25 Max 5.5 -- 1 1 2 -- -- 100 VCC 0.2*VCC 55 -- 0.25 10 -- 5.5 -- -- -- Units V A V V kHz V V A A V A s s mA C C IFG = -1 mA VFG = 5.5V PWM = 0 PWM = 0, VCC = 5V IOUT = 0.5A, VCC = 5V IOUT = 0.5A, VCC = 5V IOUT = 0.5A, VCC = 5V VCC = 3.3V to 5.5V VCC < 3.3V Conditions
2011 Microchip Technology Inc.
DS25003A-page 5
MTD6502B
TEMPERATURE SPECIFICATIONS
Electrical Specifications: Unless otherwise specified, all limits are established for VCC = 5.0V, TA = +25C Parameters Temperature Ranges Operating Temperature Storage Temperature Range Thermal Package Resistances Thermal Resistance, 10L-TDFN JA -- 68 -- C/W TOPR TSTG -40 -55 -- -- +125 +150 C C Sym Min Typ Max Units Conditions
DS25003A-page 6
2011 Microchip Technology Inc.
MTD6502B
2.0 PIN DESCRIPTIONS
MTD6502B PIN FUNCTION TABLE
Type O -- -- O O O -- I Name FG GND VDD OUT1 OUT2 OUT3 VCC DIR Motor speed indication output Negative voltage supply (ground) Internal regulator output (for decoupling only) Single phase coil output pin Single phase coil output pin Single phase coil output pin Positive voltage supply for motor driver Motor Rotation Direction: - Forward direction: connect pin to GND or leave floating - Reverse direction: connect pin to VDD PWM input signal for speed control Exposed Thermal Pad (EP) Function The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
MTD6502B 3x3 TDFN 1 2, 6 3 4 5 7 8 9
10 11
I --
PWM EP
Legend: I = Input; O = Output
2011 Microchip Technology Inc.
DS25003A-page 7
MTD6502B
NOTES:
DS25003A-page 8
2011 Microchip Technology Inc.
MTD6502B
3.0 FUNCTIONAL DESCRIPTION
3.4
The MTD6502B generates a full-wave signal to drive a 3-phase sensorless BLDC motor. High efficiency and low-power consumption are achieved due to the CMOS transistors and synchronous rectification drive type.
Lock-up Protection and Automatic Restart
3.1
Speed Control
The rotational speed of the motor can be controlled either through the PWM digital input signal, or by acting directly on the power supply (VCC). When the PWM signal is High (or left open), the motor rotates at full speed. When the PWM signal is Low, the motor is stopped (and the IC outputs are set to high-impedance). By changing the PWM duty cycle, the speed can be adjusted. Notice that the PWM frequency has no special meaning for the motor speed and is asynchronous with the activation of the output transistors. Thus, the user has the maximum freedom to choose the PWM system frequency within a wide range (from 1 kHz to 100 kHz), while the output transistor activation always occurs at a fixed rate (20 kHz, or 30 kHz), which is outside of the range of audible frequencies. Note: The standard output frequency is 30 kHz. The 20 kHz output frequency option is available upon request.
If the motor is blocked and cannot rotate freely, a lock-up protection circuit detects this situation and disables the driver (by setting its outputs to high-impedance), in order to prevent the motor coil from burnout. After a "waiting time" (TWAIT), the lock-up protection is released and normal operation resumes for a given time (TRUN). If the motor is still blocked, a new period of waiting time is started. TWAIT and TRUN timings are fixed internally, so that no external capacitor is needed.
3.5
Overcurrent Protection
The motor peak current is limited by the driver to a fixed value (defined internally), thus limiting the maximum power dissipation in the coils.
3.6
Thermal Shutdown
3.2
Motor Rotation Direction
The current carrying order of the outputs depends on the DIR pin state (Rotation Direction) according to Table 3-1.
The MTD6502B has a thermal protection function which detects when the die temperature exceeds TJ = +170C. When this temperature is reached, the circuit enters the Thermal Shutdown mode, and the outputs OUT1, OUT2 and OUT3 are disabled (highimpedance), avoiding the IC destruction and allowing the circuit to cool down. Once the junction temperature (TJ) has dropped below +145C, the normal operation resumes (thermal detection circuit has +25C hysteresis function).
Thermal shutdown
TABLE 3-1:
MOTOR ROTATION DIRECTION OPTIONS (DIR PIN)
Rotation Direction Forward Outputs Activation Sequence OUT1 OUT2 OUT3
Normal operation +145 +170 TJ
DIR Pin State Connected to GND or Floating Connected to VDD
FIGURE 3-1: Hysteresis.
Thermal Protection
Reverse OUT3 OUT2 OUT1
3.7
Internal Voltage Regulator
3.3
Frequency Generator Function
The Frequency Generator output (FG) is a "Hall-sensor equivalent" digital output, that gives information to an external controller about the speed and phase of the motor. The FG pin is an open collector output, connecting to a logical voltage level through an external pull-up resistor. When a lock (or out-of-sync) situation is detected by the driver, this output is set to high-impedance until the motor is restarted. Leave the pin open when not used. Note: FG/2 option is available upon request for 8-pole applications.
VDD voltage is generated internally and is used to supply the internal logical blocks. The VDD pin is used to connect an external decoupling capacitor (1 F, or higher). Notice that this pin is for IC internal use, and is not designed to supply DC current to external blocks.
2011 Microchip Technology Inc.
DS25003A-page 9
MTD6502B
3.8 BEMF Coefficient Setting
Km is the electro-mechanical coupling coefficient of the motor (also referred to as "motor constant" or "BEMF constant"). Depending on the conventions in use, there may be some inconsistency in the exact definition of Km and its measurement criteria among different motor manufacturers. In order to work with various motor applications, the MTD6502B offers various options to adopt a wide range of BEMF coefficient. The BEMF coefficient (Km) is defined as the peak value of the phase-to-phase BEMF voltage, normalized to the electrical speed of the motor.
TABLE 3-2:
KM OPTIONS
Option 0 1 2
Km (mV/Hz) Range Phase-to-Phase Min 3.25 6.5 13 Max 6.5 13 26
DS25003A-page 10
2011 Microchip Technology Inc.
MTD6502B
4.0
4.1
PACKAGING INFORMATION
Package Marking Information
10-Lead TDFN (3x3x0.9 mm) Example
XXXX YYWW NNN
AAAA 1104 256
PIN 1
PIN 1
Device MTD6502B-LC1-00 MTD6502B-LC1-01 MTD6502B-LC1-02
Code AAAA AAAB AAAC
Legend: XX...X Y YY WW NNN
e3
*
Customer-specific information Year code (last digit of calendar year) Year code (last 2 digits of calendar year) Week code (week of January 1 is week `01') Alphanumeric traceability code Pb-free JEDEC designator for Matte Tin (Sn) This package is Pb-free. The Pb-free JEDEC designator ( e3 ) can be found on the outer packaging for this package.
Note:
In the event the full Microchip part number cannot be marked on one line, it will be carried over to the next line, thus limiting the number of available characters for customer-specific information.
2011 Microchip Technology Inc.
DS25003A-page 11
MTD6502B
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging
DS25003A-page 12
2011 Microchip Technology Inc.
MTD6502B
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at http://www.microchip.com/packaging
2011 Microchip Technology Inc.
DS25003A-page 13
MTD6502B
NOTES:
DS25003A-page 14
2011 Microchip Technology Inc.
MTD6502B
APPENDIX A: REVISION HISTORY
Revision A (March 2011)
* Original Release of this Document.
2011 Microchip Technology Inc.
DS25003A-page 15
MTD6502B
NOTES:
DS25003A-page 16
2011 Microchip Technology Inc.
MTD6502B
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.
PART NO. -X XX Package -XX Km Range Value Examples:
a) b) Device: MTD6502B-L: 3-Phase BLDC Sinusoidal Sensorless Fan Motor Driver (Tape and Reel) c) MTD6502B-LC1-00 MTD6502B-LC1-01 MTD6502B-LC1-02 Tape and Reel, 10LD TDFN Pkg, Km Range Value = 0 Tape and Reel, 10LD TDFN Pkg, Km Range Value = 1 Tape and Reel, 10LD TDFN Pkg, Km Range Value = 2
Device Tape&Reel
Package:
C1
=
Plastic Dual Flat, No Lead Package, 3x3x0.9 mm Body (TDFN)
Km Range Value:
See Table 3-2 for details.
2011 Microchip Technology Inc.
DS25003A-page 17
MTD6502B
NOTES:
DS25003A-page 18
2011 Microchip Technology Inc.
MTD6502B
Note the following details of the code protection feature on Microchip devices:
* * *
Microchip products meet the specification contained in their particular Microchip Data Sheet. Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip's Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. Microchip is willing to work with the customer who is concerned about the integrity of their code. Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as "unbreakable."
* *
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip's code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC32 logo, rfPIC and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor, MXDEV, MXLAB, SEEVAL and The Embedded Control Solutions Company are registered trademarks of Microchip Technology Incorporated in the U.S.A. Analog-for-the-Digital Age, Application Maestro, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit, PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance, TSHARC, UniWinDriver, WiperLock and ZENA are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. (c) 2011, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. ISBN: 978-1-60932-991-4
Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC(R) MCUs and dsPIC(R) DSCs, KEELOQ(R) code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip's quality system for the design and manufacture of development systems is ISO 9001:2000 certified.
2011 Microchip Technology Inc.
DS25003A-page 19
Worldwide Sales and Service
AMERICAS
Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: http://www.microchip.com/ support Web Address: www.microchip.com Atlanta Duluth, GA Tel: 678-957-9614 Fax: 678-957-1455 Boston Westborough, MA Tel: 774-760-0087 Fax: 774-760-0088 Chicago Itasca, IL Tel: 630-285-0071 Fax: 630-285-0075 Cleveland Independence, OH Tel: 216-447-0464 Fax: 216-447-0643 Dallas Addison, TX Tel: 972-818-7423 Fax: 972-818-2924 Detroit Farmington Hills, MI Tel: 248-538-2250 Fax: 248-538-2260 Indianapolis Noblesville, IN Tel: 317-773-8323 Fax: 317-773-5453 Los Angeles Mission Viejo, CA Tel: 949-462-9523 Fax: 949-462-9608 Santa Clara Santa Clara, CA Tel: 408-961-6444 Fax: 408-961-6445 Toronto Mississauga, Ontario, Canada Tel: 905-673-0699 Fax: 905-673-6509
ASIA/PACIFIC
Asia Pacific Office Suites 3707-14, 37th Floor Tower 6, The Gateway Harbour City, Kowloon Hong Kong Tel: 852-2401-1200 Fax: 852-2401-3431 Australia - Sydney Tel: 61-2-9868-6733 Fax: 61-2-9868-6755 China - Beijing Tel: 86-10-8528-2100 Fax: 86-10-8528-2104 China - Chengdu Tel: 86-28-8665-5511 Fax: 86-28-8665-7889 China - Chongqing Tel: 86-23-8980-9588 Fax: 86-23-8980-9500 China - Hong Kong SAR Tel: 852-2401-1200 Fax: 852-2401-3431 China - Nanjing Tel: 86-25-8473-2460 Fax: 86-25-8473-2470 China - Qingdao Tel: 86-532-8502-7355 Fax: 86-532-8502-7205 China - Shanghai Tel: 86-21-5407-5533 Fax: 86-21-5407-5066 China - Shenyang Tel: 86-24-2334-2829 Fax: 86-24-2334-2393 China - Shenzhen Tel: 86-755-8203-2660 Fax: 86-755-8203-1760 China - Wuhan Tel: 86-27-5980-5300 Fax: 86-27-5980-5118 China - Xian Tel: 86-29-8833-7252 Fax: 86-29-8833-7256 China - Xiamen Tel: 86-592-2388138 Fax: 86-592-2388130 China - Zhuhai Tel: 86-756-3210040 Fax: 86-756-3210049
ASIA/PACIFIC
India - Bangalore Tel: 91-80-3090-4444 Fax: 91-80-3090-4123 India - New Delhi Tel: 91-11-4160-8631 Fax: 91-11-4160-8632 India - Pune Tel: 91-20-2566-1512 Fax: 91-20-2566-1513 Japan - Yokohama Tel: 81-45-471- 6166 Fax: 81-45-471-6122 Korea - Daegu Tel: 82-53-744-4301 Fax: 82-53-744-4302 Korea - Seoul Tel: 82-2-554-7200 Fax: 82-2-558-5932 or 82-2-558-5934 Malaysia - Kuala Lumpur Tel: 60-3-6201-9857 Fax: 60-3-6201-9859 Malaysia - Penang Tel: 60-4-227-8870 Fax: 60-4-227-4068 Philippines - Manila Tel: 63-2-634-9065 Fax: 63-2-634-9069 Singapore Tel: 65-6334-8870 Fax: 65-6334-8850 Taiwan - Hsin Chu Tel: 886-3-6578-300 Fax: 886-3-6578-370 Taiwan - Kaohsiung Tel: 886-7-213-7830 Fax: 886-7-330-9305 Taiwan - Taipei Tel: 886-2-2500-6610 Fax: 886-2-2508-0102 Thailand - Bangkok Tel: 66-2-694-1351 Fax: 66-2-694-1350
EUROPE
Austria - Wels Tel: 43-7242-2244-39 Fax: 43-7242-2244-393 Denmark - Copenhagen Tel: 45-4450-2828 Fax: 45-4485-2829 France - Paris Tel: 33-1-69-53-63-20 Fax: 33-1-69-30-90-79 Germany - Munich Tel: 49-89-627-144-0 Fax: 49-89-627-144-44 Italy - Milan Tel: 39-0331-742611 Fax: 39-0331-466781 Netherlands - Drunen Tel: 31-416-690399 Fax: 31-416-690340 Spain - Madrid Tel: 34-91-708-08-90 Fax: 34-91-708-08-91 UK - Wokingham Tel: 44-118-921-5869 Fax: 44-118-921-5820
02/18/11
DS25003A-page 20
2011 Microchip Technology Inc.

▲Up To Search▲

Price & Availability of MTD6502B

	To Download MTD6502B Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .