Ordering number: EN3949C Monolithic Digital IC LB1838M Low-saturation, Bidirectional Motor Driver for Low-voltage Applications Overview Package Dimensions The LB1838M is a low-saturation two-channel bidirectional motor driver IC for use in low-voltage applications. The LB1838M is a bipolar stepper-motor driver IC that is ideal for use in printers, FDDs, cameras and other portable devices. unit : mm 3111-MFP14S [LB1838M] Features . Low voltage operation (2.5 V min) . Low saturation voltage (upper transistor + lower transistor voltage; 0.40 V at 400 mA). . residual Through-current prevention circuit built in . Separate logic power supply and motor power supply . Spark killer diodes built in . Thermal shutdown circuit built in . Compact package (14-pin MFP) SANYO : MFP14S Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Output applied voltage Input applied voltage Ground pin flow-out current Allowable power dissipation Symbol Conditions Ratings Unit VCC max –0.3 to +10.5 V VS max –0.3 to +10.5 V VOUT VIN IGND VS + VSF V –0.3 to +10 V Per channel 1.0 A Pd max1 Independent IC 550 mW Pd max2 * With board 800 mW Operating temperature Topr –20 to +75 °C Storage temperature Tstg –40 to +125 °C Ratings Unit *Note: Mounted on 20 × 30 × 1.5 mm3 glass epoxy PCB Allowable Operating Ranges at Ta = 25°C Parameter Supply voltage Symbol Conditions VCC 2.5 to 9.0 V VS 1.8 to 9.0 V Input high-level voltage VIH 1.8 to 9.0 V Input low-level voltage VIL –0.3 to +0.7 V SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN 21097HA(II)/O1596HA(II)/4302TS(US) No.3949-1/4 LB1838M Electrical Characteristics at Ta = 25°C, VCC = 3 V Parameter Supply current 1 Supply current 2 Output saturation voltage Input current 1 Input current 2 Output sustaining voltage Spark killer diode reverse current Spark killer diode forward voltage Symbol ICC0 ICC1 VOUT1 VOUT2 IIN IENA VO (sus) Conditions ENA1, 2 = 0 V, VIN1 = 3 V or 0 V ENA1 = 3 V, VIN1 = 3 V or 0 V ENA = 3 V, VIN =3 V or 0 V, IOUT = 200 mA ENA = 3 V, VIN = 3 V or 0 V, IOUT = 400 mA VCC = 6 V, VIN = 6 V VCC = 6 V, ENA = 6 V IOUT = 400 mA Is (leak) VSF min typ 0.1 12 0.2 0.4 max 10 18 0.28 0.6 200 200 Unit µA mA V V µA µA V VCC1, VS = 7 V 30 µA IOUT = 400 mA 1.7 V 9 Pin Assignment Note: Both GND pins should be connected to ground. Truth Table IN 1, 2 L H L H ENA 1, 2 H H L L OUT 1, 3 H L OFF OFF OUT 2, 4 L H OFF OFF Mode Forward Reverse Standby Standby No.3949-2/4 LB1838M Block Diagram 80kΩ Control 60kΩ 60kΩ 80kΩ Thermal shutdown 80kΩ Control 60kΩ 60kΩ 80kΩ Note: As long as the voltages applied to VCC, VS1, VS2, ENA1, ENA2, IN1, and IN2 are within the limits set by the absolute maximum ratings, there are no restrictions on the relationship of each voltage level in comparison with the others (regarding which is higher or lower). (ex. VCC = 3 V, VS1, 2 = 2 V, ENA = IN = 5 V) Vcont pin (= constant) As shown in the above diagram, the Vcont pin outputs the voltage of the band gap Zener VZ+VF (= 1.93 V). In normal use, this pin is left open. The drive current ID is varied by the Vcont voltage. However, because the band gap Zener is shared, it functions as a bridge. No.3949-3/4 Specified board (30 × 30 × 1.5 mm3 glass epoxy ) Output saturation voltage, VO(sat) − V Allowable power dissipation, Pd max − mW LB1838M Output current, IO − mA VO (sat) – Ta Input current, IIN – µA Output saturation voltage, VO (sat) – V Ambient temperature, Ta − °C IIN – VIN Input voltage, VIN – V IS – VS value Ambient temperature, Ta – °C ICC – VCC For 1 channel Current drain, IS – mA Current drain, ICC – mA For 1 channel Supply voltage, VS – V Reverse Forward Supply voltage, VCC – V 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. Anyone purchasing any products described or contained herein for an above-mentioned use shall: 1 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: 2 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. 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, 1997. Specifications and information herein are subject to change without notice. No.3949-4/4