1/4 STRUCTURE Silicon Monolithic Integrated Circuit PRODUCT SERIES Single-Phase Full-Wave Motor Driver for Fan Motor TYPE ＢＤ６７２１ＦＳ FEATURES Speed controllable by DC / PWM input Current limit circuit PWM soft switching drive 〇ABSOLUTE MAXIMUM RATINGS Symbol Limit Parameter Supply voltage 20 Vcc 812.5＊ Power dissipation Pd -40～+100 Operating temperature Topr -55～+150 Storage temperature Tstg 1.0＊＊ Output current Iomax IFG 10 FG signal output current VFG 20 FG signal output voltage IAL 10 AL signal output current VAL 20 AL signal output voltage IVREF 8 VREF current ability Tjmax 150 Junction temperature ＊ Reduce by 6.5mW/℃ over Ta=25℃. (On 70.0mm×70.0mm×1.6mm glass epoxy board) ＊＊ This value is not to exceed Pd. Unit V mW ℃ ℃ A mA V mA V mA ℃ 〇OPERATING CONDITIONS Parameter Operating supply voltage range Hall input voltage range VTH input voltage range VMIN input voltage range Symbol Vcc VH VVTH VVMIN ＊This product is not designed for production against radioactive rays. ＊This document may be strategic data subject to COCOM regulations. REV. D Limit 4.5～17.0 0～Vcc-2.0 0～Vcc-2.0 0～Vcc-2.0 Unit V V V V 2/4 〇ELECTRICAL CHARACTERISTICS (Unless otherwise specified Ta=25℃,Vcc=12V) Limit Typ. 7.0 ±10 Max. 10.0 ±15 Unit Icc VHYS Min. 4.0 ±5 VO - 0.6 0.9 V Lock detection ON time Lock detection OFF time TON TOFF 0.3 3.0 0.5 5.0 0.7 7.0 s s FG output low voltage VFGL - 0.15 0.3 V IFG=5mA FG output leak current IFGL - - 50 μA VFG=17V AL output low voltage VALL - 0.15 0.3 V IAL=5mA AL output leak current IALL - - 50 μA VAL=17V OSC low voltage OSC high voltage OSC charge current OSC discharge current Level amp gain Level amp output low voltage VOSCL VOSCH ICOSC IDOSC GLA VLAOL 0.8 2.3 -50 26 50 - 1.0 2.5 -32 32 0.2 1.2 2.7 -26 50 0.3 V V μA μA dB V Level amp output high voltage VLAOH - 1.6 2.0 V Output ON duty 1 DUTY1 85 90 95 % Output ON duty 2 DUTY2 45 50 55 % Output ON duty 3 DUTY3 5 10 15 % VREF voltage VREF 2.8 3.0 3.2 V Current limit voltage VTH bias current VMIN bias current VCL IVTH IVMIN 290 - 310 - 330 0.2 0.2 mV μA μA Parameter Circuit current Hall input hysteresis Output voltage Symbol REV. D Conditions mA mV Io=300mA Upper and Lower total Voltage between LAOUT and Vcc VTH=VREF*0.383 OUT=Pull down 1kΩ COSC=470pF VTH=VREF*0.583 OUT=Pull down 1kΩ COSC=470pF VTH=VREF*0.783 OUT=Pull down 1kΩ COSC=470pF IVREF=-2mA 3/4 〇PACKAGE OUTLINES 6.6±0.2 9 0.3Min. 6.2±0.3 1.5±0.1 4.4±0.2 0.11 16 BD6721 1 8 0.15±0.1 Lot No. 0.1 0.8 0.36±0.1 SSOP-A16 (UNIT:mm) 〇BLOCK DIAGRAM 〇TERMINAL NAME GND AL COSC 1 VREF 2 + LAOUT - 3 + 4 LEVEL AMP 5 VMIN TSD VREF VMIN PWM COMP 14 LOCK PROTECTION H13 CONTROL LOGIC - + H+ HALL COMP PRE DRIVER + - 7 12 Vcc Vcc 6 OUT1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 FG 15 VTH PWMCOMP - LAIN VTH SIGNAL OUTPUT SOFT SWITCH COSC PIN No. 16 11 CURRENT LIMIT COMP + - CS 10 RNF OUT2 8 9 REV. D Terminal name GND COSC LAOUT LAIN VTH VMIN OUT1 RNF OUT2 CS VCC H+ HVREF FG AL 4/4 〇CAUTIONS ON USE 1) Absolute maximum ratings An excess in the absolute maximum rations, such as supply voltage, temperature range of operating conditions, etc., can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection devices, such as fuses. 2) Connecting the power supply connector backward Connecting of the power supply in reverse polarity can damage IC. Take precautions when connecting the power supply lines. An external direction diode can be added. 3) Power supply line Back electromotive force causes regenerated current to power supply line, therefore take a measure such as placing a capacitor between power supply and GND for routing regenerated current. And fully ensure that the capacitor characteristics have no problem before determine a capacitor value. (when applying electrolytic capacitors, capacitance characteristic values are reduced at low temperatures) 4) GND potential The potential of GND pin must be minimum potential in all operating conditions. Also ensure that all terminals except GND terminal do not fall below GND voltage including transient characteristics. However, it is possible that the motor output terminal may deflect below GND because of influence by back electromotive force of motor. Malfunction may possibly occur depending on use condition, environment, and property of individual motor. Please make fully confirmation that no problem is found on operation of IC. 5) Thermal design Use a thermal design that allows for a sufficient margin in light of the power dissipation(Pd) in actual operating conditions. 6) Inter-pin shorts and mounting errors Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any connection error or if pins are shorted together. 7) Actions in strong electromagnetic field Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to malfunction. 8) ASO When using the IC, set the output transistor so that it does not exceed absolute maximum rations or ASO. 9) Thermal shut down circuit The IC incorporates a built-in thermal shutdown circuit (TSD circuit). Operation temperature is 175℃(typ.) and has a hysteresis width of 25℃(typ.). When IC chip temperature rises and TSD circuit works, the output terminal becomes an open state. TSD circuit is designed only to shut the IC off to prevent thermal runaway. It is not designed to protect the IC or guarantee its operation. Do not continue to use the IC after operation this circuit or use the IC in an environment where the operation of this circuit is assumed. 10) Testing on application boards When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to stress. Always discharge capacitors after each process or step. Always turn the IC’s power supply off before connecting it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps as an antistatic measure. Use similar precaution when transporting or storing the IC. 11) GND wiring pattern When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns, placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to change the GND wiring pattern of any external components, either. 12) Capacitor between output and GND When a large capacitor is connected between output and GND, if Vcc is shorted with 0V or GND for some cause, it is possible that the current charged in the capacitor may flow into the output resulting in destruction. Keep the capacitor between output and GND below 100uF. 13) IC terminal input When Vcc voltage is not applied to IC, do not apply voltage to each input terminal. When voltage above Vcc or below GND is applied to the input terminal, parasitic element is actuated due to the structure of IC. Operation of parasitic element causes mutual interference between circuits, resulting in malfunction as well as destruction in the last. Do not use in a manner where parasitic element is actuated. REV. D Appendix Notes No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM CO.,LTD. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose of introducing ROHM's products (hereinafter "Products"). If you wish to use any such Product, please be sure to refer to the specifications, which can be obtained from ROHM upon request. Examples of application circuits, circuit constants and any other information contained herein illustrate the standard usage and operations of the Products. The peripheral conditions must be taken into account when designing circuits for mass production. Great care was taken in ensuring the accuracy of the information specified in this document. However, should you incur any damage arising from any inaccuracy or misprint of such information, ROHM shall bear no responsibility for such damage. The technical information specified herein is intended only to show the typical functions of and examples of application circuits for the Products. ROHM does not grant you, explicitly or implicitly, any license to use or exercise intellectual property or other rights held by ROHM and other parties. ROHM shall bear no responsibility whatsoever for any dispute arising from the use of such technical information. The Products specified in this document are intended to be used with general-use electronic equipment or devices (such as audio visual equipment, office-automation equipment, communication devices, electronic appliances and amusement devices). The Products are not designed to be radiation tolerant. While ROHM always makes efforts to enhance the quality and reliability of its Products, a Product may fail or malfunction for a variety of reasons. Please be sure to implement in your equipment using the Products safety measures to guard against the possibility of physical injury, fire or any other damage caused in the event of the failure of any Product, such as derating, redundancy, fire control and fail-safe designs. ROHM shall bear no responsibility whatsoever for your use of any Product outside of the prescribed scope or not in accordance with the instruction manual. The Products are not designed or manufactured to be used with any equipment, device or system which requires an extremely high level of reliability the failure or malfunction of which may result in a direct threat to human life or create a risk of human injury (such as a medical instrument, transportation equipment, aerospace machinery, nuclear-reactor controller, fuel-controller or other safety device). ROHM shall bear no responsibility in any way for use of any of the Products for the above special purposes. If a Product is intended to be used for any such special purpose, please contact a ROHM sales representative before purchasing. If you intend to export or ship overseas any Product or technology specified herein that may be controlled under the Foreign Exchange and the Foreign Trade Law, you will be required to obtain a license or permit under the Law. Thank you for your accessing to ROHM product informations. More detail product informations and catalogs are available, please contact your nearest sales office. ROHM Customer Support System www.rohm.com Copyright © 2009 ROHM CO.,LTD. THE AMERICAS / EUROPE / ASIA / JAPAN Contact us : webmaster @ rohm.co. jp 21 Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL : +81-75-311-2121 FAX : +81-75-315-0172 Appendix-Rev4.0