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| Ordering number : EN5806 Monolithic Digital IC LB1943 Forward/Reverse Motor Driver with Braking Function Overview The LB1943 is a forward/reverse motor driver IC. This IC supports forward, reverse, and braking control from a single input, and the desired output voltage can be set with a resistor. Either full drive or VC drive can be selected from the single input, and the LB1943 can be controlled from a microprocessor. Package Dimensions unit: mm 3043A-SIP10 [LB1943] Functions * Single-input control of forward, reverse, and braking operations * Resistor output voltage setup * Either full drive or VC drive can be selected from the single control input. * Can be controlled from a microprocessor. * Built-in motor dash current absorbing device * Built-in reference voltage circuit * Built-in thermal protection circuit SANYO: SIP10 Specifications Absolute Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Input voltage Output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max VIN IOUT Pd max Topr Tstg VCC VIN Conditions Ratings 18 -0.3 to +6 1.6 1.2 -25 to +75 -55 to +125 Unit V V A W C C Allowable Operating Ranges at Ta = 25C Parameter Supply voltage range Forward-reverse disabled time Symbol VCC1 VCC2 Toff VCC1 VCC2 Conditions Ratings 8 to 18 5 to 18 Over 20 Unit V V s Electrical Characteristics at Ta = 25C, VCC = 12 V Parameter Input low-level voltage Input high-level voltage Input mid-level voltage Input impedance Current drain Symbol VINL VINH VINM ZIN ICC Conditions Ratings min 0 4.2 2 75 5.5 10.0 typ max 1 6.0 3 Unit V V V k mA Continued on next page. SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN 22898HA (OT) No. 5806-1/5 LB1943 Continued from preceding page. Parameter Symbol VOUT1 Output voltage VOUT2 Output leakage current Saturation voltage (upper) IOL V (sat)11 V (sat)12 V (sat)21 V (sat)22 VREF VREF/IREF TSTD IREF = 0 to -2.0 mA VOUT/VC, VC = 2.5 V, RL = 60 * 1.5 150 Conditions RL = 60 , VC = 2.5 V VIN1 = 2.5 V, VIN2 = 0 V RL = 60 , VC = 2.5 V VIN1 = 2.5 V, VIN2 = 5.0 V RL = VCC = 12V, IOUT = 300 mA VCC = 12V, IOUT = 500 mA VCC = 12V, IOUT = 300 mA VCC = 12V, IOUT = 500 mA 6.0 Ratings min 4.4 4.4 typ 4.95 4.95 0.01 1.9 1.9 0.25 0.4 6.35 0.05 1.9 180 max 5.4 5.4 1.0 2.2 2.3 0.5 0.65 6.8 0.1 2.4 Unit V V mA V V V V V V/mA x C Saturation voltage (lower) Reference power supply Reference voltage load characteristics Control-to-output gain TSD operating temperature Note: Items marked with an asterisk (*) are design target values, and are not tested. Pin Assignment Allowable power dissipation, Pd max - W 1.4 1.2 1.0 0.8 0.6 0.4 0 -25 0.6 Pd max - Ta Tj = 125 C 0 25 50 75 100 Ambient temperature, Ta - C Truth Table Input IN1 H M L H M L H M L IN2 H H H M M M L L L Output voltage OUT1 L L L OFF OFF OFF FULL VC x 2 VC x 2 OUT2 FULL VC x 2 VC x 2 OFF OFF OFF L L L Operation Forward (reverse) operation Forward (reverse) operation Forward (reverse) operation Braking Braking Braking Reverse (forward) operation Reverse (forward) operation Reverse (forward) operation Input levels: VH: Over 4.2 V VM: 2.0 to 3.0 V VL: Under 1.0 V IN1 and IN2 go to 2.5 V when left open. LB1943 operation is equivalent to that of the LB1641. No. 58062/5 LB1943 Pin Functions Pin No. 1 Symbol GND Pin function * Power system ground. This line is shared with the signal system ground. Equivalent circuit * Output voltage switching input 3 IN1 * Goes to VM (about 2.5 V) when left open. * Forward, reverse, or braking control input 4 IN2 * Goes to VM (about 2.5 V) when left open. 6 VC * Output voltage setting 7 VREF * Reference voltage output. VREF = 6.35 V 8 VCC1 * Signal system power supply 9 VCC2 * Power system power supply 2 10 OUT1 OUT2 * Outputs that are connected to the motor coils No. 58063/5 LB1943 Internal Equivalent Circuit Pre-driver Logic circuit Peripheral Circuit Example Motor Microcontroller control port Usage Notes 1. The microprocessor output ports are CMOS outputs, and must be used in the high, low, or open states. 2. We recommend using a value of about 60 k for R1 and R2. 3. Voltages applied to the IN1 and IN2 pins must not exceed the range 0 to 6 V. Note that negative voltages can cause the IC to operate incorrectly. Also, do not apply voltages to IN1 or IN2 when the VCC voltage is not applied. 4. To prevent the upper and lower output transistors from both being in the on state at the same time, when switching the IN1 and IN2 values, always hold the input open for a brief period during the transition. We recommend holding the open state for a few tens of microseconds. 5. A capacitor must be inserted between VCC and ground. We recommend that this capacitor have a value of at least 20 F. No. 58064/5 Reference voltage circuit Thermal protection circuit LB1943 6. During motor drive, large currents (on the order of several hundred mA) flow in the motor power supply block. Therefore, the printed circuit board layout and interconnections must be designed so that there are no shared devices. 7. If negative voltages are applied to OUT1 and OUT2 and the IC operates incorrectly, insert Schottky diodes between OUT1 and ground and between OUT2 and ground. 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: 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 February, 1998. Specifications and information herein are subject to change without notice. PS No. 5806-5/5 |
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