LB1869M

Ordering number : N4943 Monolithic Digital IC LB1863M, 1869M Two-Phase Unipolar Brushless Motor Driver Automatic Recovery Type Circuit in a Miniature Flat Package Overview The LB1863M and LB1869 (LB1669M) are 2-phase unipolar brushless motor drivers that are provided in a miniature flat package that contributes to end product miniaturization and supports automatic mounting. These products support the implementation of motor drive lock protection and automatic recovery circuits, and alarm specifications with a minimal number of external components. Package Dimensions unit: mm 3111-MFP14S [LB1863M, 1869M] Features and Functions • Hall elements can be connected directly to the IC itself. • 1.5-A output current output transistors built in • Rotation detection function that provides a low-level output during motor drive and a high-level output when the motor is stopped • Motor lock protection and automatic recovery functions built in • Thermal shutdown circuit • Switching noise can be reduced with an external ceramic capacitor. SANYO: MFP14S Classification Package System voltage 12 V 24 V MFP-10S LB1669M MFP-14S LB1869M* LB1863M* Note: * The LB1869M and LB1863M are pin compatible so that the same printed circuit board can be used for both 12 V and 24 V products. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum input current Output voltage Output current RD influx current RD voltage Allowable power dissipation Operating temperature Storage temperature Symbol ICC max VOUT IOUT IRD VRD Pd max Topr Tstg When mounted (on a 20 × 15 × 1.5-mm3 glass-epoxy printed circuit board) t ≤ 20 ms LB1863M LB1869M Conditions Ratings 200 –0.3 to +85 –0.3 to +60 1.5 10 30 800 –30 to +80 –55 to +150 Unit mA V V A mA V mW °C °C SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 13097HA (OT) No. 4943-1/5 LB1863M, 1869M Allowable Operating Ranges at Ta = 25°C Parameter Input current range Common-mode input voltage range Symbol ICC VICM Conditions Ratings 6.0 to 50 0 to VIN –1.5 Unit mA V Electrical Characteristics at Ta = 25°C, ICC = 10 mA Parameter Symbol LB1863M Output voltage 1 VOR VO(SUS) VO(sat)1 VO(sat)2 VIN VOFF IBA VRD(sat) IC1 IC2 VTH1 VTH2 IRD = 5 mA 2.1 0.31 0.77 0.42 LB1869M LB1863M : IO = 0.1 A LB1869M : IO = 0.1 A IO = 0.5 A IO = 1.0 A ICC = 7.0 mA 6.4 –7 –250 0.1 3 0.44 0.8VIN 0.45VIN 0.3 3.9 0.59 0.83 0.48 Conditions Ratings min 80 60 65 40 0.95 1.15 6.7 0 1.2 1.5 7.0 7.0 typ max Unit V V V V V V V mA nA V µA µA V V Output voltage 2 Output saturation voltage Input voltage Amplifier input offset voltage Amplifier input bias current RD output saturation voltage Capacitor discharge current Comparator input threshold voltage Pin Assignment No. 4943-2/5 LB1863M, 1869M Equivalent Circuit, Block Diagram, and Sample Application Sample Application Circuit No. 4943-3/5 LB1863M, 1869M Sample Application Circuit Output Waveforms Truth Table IN+ H L H L IN– L H L H C L L H H OUT1 H L H H OUT2 L H H H RD L L H H Design Documentation (See the application circuit diagram.) 1. Power-supply voltage (VIN pin) Since these miniature flat package products supply power to the Hall amplifier block and the control block from an internal parallel regulator, they operate with good stability with respect to kickback currents from the motor and variations in the power-supply voltage. They also provide an adequate ability to withstand surges. The resistor R1 between the VCC and VIN pins should be set up so that a current in the range ICC = 6 to 50 mA flows into the VIN pin in the fan motor power-supply voltage range. VIN has a typical value of 6.7 volts when ICC is 7 mA. The current flowing into VIN can be calculated with the following formula. VCC – VIN ICC = ————— ......................(1) R1 • Abnormal voltage considerations The maximum allowable current for the VIN pin is 200 mA. Therefore, the IC design allows it to withstand voltages up to the plus side abnormal voltage Vsurge give by formula (2). Vsurge = VIN + R1 × 200 mA......(2) 2. Hall input pin voltages (IN– and IN+ pins) The Hall element output voltages to the Hall element input pins must be in the range 0 to (VIN –1.5 V). The gain from the Hall input pins to the output pin is over 100 dB. The Hall input amplifier offset voltage is ±7 mV. This means that the Hall element output must be set up taking this ±7 mV offset into account. 3. Output transistors (OUT1 and OUT2 pins) Output current: IO = 1.5 A maximum Output saturation voltage: VOsat = 1.15V/1.0 A (typical) Applications should adopt one of the following three output protection techniques. Œ If a capacitor is inserted between OUT and ground, use a capacitor with a value up to C = 10 µF, and design that value so that the kickback and reverse voltages do not exceed VOR.  If a Zener diode is added, determine a value for the Zener voltage that is lower than VO(SUS). If radio-frequency noise is a problem, insert a capacitor between B1 and B2. Ž If a capacitor is inserted between OUT and B1, set the capacitor value so that the kickback voltage is lower than VO(SUS). If oscillation occurs, insert a resistor in series with the capacitor. No. 4943-4/5 LB1863M, 1869M 4. Output protection function (C pin) This pin connects the capacitor that forms the automatic recovery circuit. If rotation stops due to, for example, a motor overload, the pin voltage rises and the output stops. The system automatically recovers from stopped to drive mode when the load is set to an appropriate level. The lock detection time can be set by changing the value of the capacitor. For a 1-µF capacitor:Lock detection time About 2 seconds Lock protection time (output on) About 1 second (output off) About 6 seconds Automatic recovery circuit pin C voltage Œ While the blades are turning, the capacitor is charged with a current of about 3 µA (typical), and C is discharged by pulses that correspond to the motor speed.  When the blades lock, the capacitor is no longer discharged, and the voltage across the capacitor increases. The output is turned off when that voltage reaches 0.8 × VIN. Ž When the output is turned off, the capacitor is discharged at a current of about 0.44 µA (typical). When the capacitor voltage falls under VTH2, if the lock state is not yet cleared the capacitor continues discharging until VTH1. (Note that the output is turned on at this time.) These operations, i.e. items  and Ž, are repeated with a ton:toff ratio of about 1:6 to protect the motor. { If the lock state has been cleared when the capacitor voltage reaches VTH2, motor rotation is started by turning the output on. 5. Rotation detection signal (RD pin) This is an open collector output, and outputs a low level in drive mode and a high level when the motor is stopped. 6. Radio-frequency noise reduction function (B1 and B2 pins) These are base pins for Darlington pair outputs. Add capacitors of about 0.01 to 0.1 µF if radio-frequency noise is a problem. 7. Thermal shutdown function Turns off the output in response to coil shorting or IC overheating. s No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property loss. s Anyone purchasing any products described or contained herein for an above-mentioned use shall: Œ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use:  Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally. s Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of January, 1997. Specifications and information herein are subject to change without notice. No. 4943-5/5