LB1948MC

Ordering number : ENA2015 Monolithic Digtal IC LB1948MC Overview 12V Low Saturation Voltage Drive Forward/Reverse Motor Driver The LB1948MC is a two-channel low saturation voltage forward/reverse motor driver IC. It is optimal for motor drive in 12V system products and can drive either two DC motors, one DC motor using parallel connection, or a two-phase bipolar stepping motor with 1-2 phase excitation mode drive. Features • Supports 12V power supply systems • Low saturation voltage: VO(sat) = 0.5V (typical) at IO = 400mA • Zero current drawn in standby mode • Braking function • Supports parallel connection: IO max = 1.6A, VO(sat) = 0.6V (typical) at IO = 800mA • Built-in spark killer diode • Built-in thermal shutdown circuit • Miniature package: MFP-10S (6.4mm × 5.0mm) Specifications Parameter Absolute Maximum Ratings at Ta = 25°C Symbol VCC max VOUT VIN IGND Pd max Topr Tstg Per channel Mounted on a specified board* Conditions Ratings -0.3 to +20 -0.3 to +20 -0.3 to +18 800 870 -20 to +85 -40 to +150 Unit V V V mA mW °C °C Maximum supply voltage Output voltage Input voltage Ground pin source current Allowable power dissipation Operating temperature Storage temperature * Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board. Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time. Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details. Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to "standard application", intended for the use as general electronics equipment. The products mentioned herein shall not be intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee thereof. If you should intend to use our products for new introduction or other application different from current conditions on the usage of automotive device, communication device, office equipment, industrial equipment etc. , please consult with us about usage condition (temperature, operation time etc.) prior to the intended use. If there is no consultation or inquiry before the intended use, our customer shall be solely responsible for the use. Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' s products or equipment. 30712 SY 20111213-S00004 No.A2015-1/6 LB1948MC Allowable Operating Range at Ta = 25°C Parameter Supply voltage Input high-level voltage Input low-level voltage Symbol VCC VIH VIL Conditions Ratings 2.5 to 16 1.8 to 10 -0.3 to +0.7 Unit V V V Electrical Characteristics at Ta = 25°C, VCC = 5V Ratings Parameter Current drain Symbol ICC0 ICC1 ICC2 Output saturation voltage VO(sat)1 VO(sat)2 Input current Spark Killer Diode Reverse current Forward voltage IS(leak) VSF IOUT = 400mA 30 1.7 μA V IIN Conditions min IN1, 2, 3, 4 = 0V (Standby mode) *1 (Forward or reverse mode) *2 (Brake mode) IOUT = 200mA (High Side and Low Side) IOUT = 400mA (High Side and Low Side) VIN = 5V typ 0.1 15 30 0.25 0.50 85 max 10 21 40 0.35 0.75 110 μA mA mA V V μA Unit *1:IN1/IN2/IN3/IN4=H/L/L/L or L/H/L/L or L/L/H/L or L/L/L/H. *2:IN1/IN2/IN3/IN4=H/H/L/L or L/L/H/H. Package Dimensions unit : mm (typ) 3420 5.0 10 1.0 Pd max -- Ta Specified board: 114.3×76.1×1.6mm3 glass epoxy board. Allowable power dissipation, Pd max -- W 0.87 0.8 4.4 6.2 0.6 0.5 0.45 0.4 1 0.8 MAX 2 1.0 0.35 0.15 0.05 (1.5) 1.55 0.2 0 -20 0 20 40 60 80 85 100 SANYO : MFP10SK(225mil) Ambient temperature, Ta -- C Pin Assignment VCC 1 IN1 2 IN2 3 IN3 4 IN4 5 Top view 10 OUT1 9 OUT2 LB1948MC 8 OUT3 7 OUT4 6 GND No.A2015-2/6 LB1948MC Truth Table Input IN1 L L H L H IN2 L L L H H L H L H L L H H IN3 L IN4 L OUT1 OFF OFF H L L Output Notes OUT2 OFF OFF L 1CH H L OFF H L L OFF L 2CH H L Reverse Brake Reverse Brake Standby mode Forward OUT3 OFF OUT4 OFF Standby mode Standby mode Forward Block Diagram VCC 10μF IN1 60kΩ OUT1 M 80kΩ OUT2 IN2 60kΩ Control block 80kΩ IN3 60kΩ Thermal shutdown circuit 80kΩ OUT3 M IN4 60kΩ OUT4 80kΩ GND No.A2015-3/6 LB1948MC Design Documentation (1) Voltage magnitude relationship There are no restrictions on the magnitude relationships between the voltages applied to VCC and IN1 to IN4. (2) Parallel connection The LB1948MC can be used as a single-channel H-bridge power supply by connecting IN1 to IN3, IN2 to IN4, OUT1 to OUT3, and OUT2 to OUT4 as shown in the figure. (IOmax = 1.6A, VO(sat) = 0.6V (typical) at IO = 800mA) 1 VCC 2 IN1 OUT1 10 M OUT2 9 3 IN2 LB1948MC OUT3 8 4 IN3 5 IN4 OUT4 7 GND 6 (3) Observe the following points when designing the printed circuit board pattern layout. • Make the VCC and ground lines as wide and as short as possible to lower the wiring inductance. • Insert bypass capacitors between VCC and ground mounted as close as possible to the IC. • Resistors of about 10KΩ must be inserted between the CPU output ports and the IN1 to IN4 pins if the microcontroller and the LB1948MC are mounted on different printed circuit boards and the ground potentials differ significantly. (4) Penetration electric current At the time of the next mode shift, a penetration electric current is generated in VCC-GND. There are not the deterioration of the IC by), the destruction as follows 1Atyp per this penetration electric current (1ch, 1μs; but for the stabilization of the power supply line of the IC is most recent, and, please can enter with a condenser. (i) Forward (Reverse) ↔ Brake (ii) Forward ↔ Reverse (iii) Standby → Brake In addition, the penetration electric current disappears when I put a wait mode of 10μs at the time of the change of the Forward ↔ Reverse. (5) Supplementary matter of the penetration electric current According to (4), a penetration electric current cannot influence IC life. Thermal Shutdown Temperature (1) Thermal shutdown temperature The thermal shutdown temperature Ttsd is 200 ± 20°C with fluctuations. (2) Thermal shutdown operation The operation of the thermal shutdown circuit is shown in the figure below. When the chip temperature Tj is in the direction of increasing (solid line), the output turns off at approximately 200°C. When the chip temperature Tj is in the direction of decreasing (dotted line), the output turns on (returns) at approximately 125°C. 14 LB1948MC Thermal shutdown reference chart VCC = 12V 100 C Return 220 C 12 Output voltage, VO -- V 10 TSD operation 8 6 4 2 220 C 0 100 120 140 160 100 C 180 200 220 Chip temperature, Tj -- C No.A2015-4/6 LB1948MC Thermal Shutdown Circuit Block Diagram Reference voltage circuit Thermal shutdown circuit Drive circuit Vref Function equivalent circuit Note: The above is an example of thermal shutdown circuits although there are some differences from the actual internal circuit. Thermal Shutdown Operation The thermal shutdown circuit compares the voltage of the heat sensitive element (diode) with the reference voltage and shuts off the drive circuit at a certain temperature to protect the IC chip from overheating. 40 ICC -- VCC VIN = 5V (= IN1 / IN2 or IN3 / IN4) H/H 400 IIN -- VIN VCC = 12V Current drain, ICC -- mA Input current, IIN -- μA 30 300 20 200 H / L, L /H 10 IN 1~ 4 100 0 L/L 0 5 10 15 20 0 0 5 10 15 20 Supply voltage, VCC -- V 0.6 VO(sat) -- IO Input voltage, VIN -- V 40 ICC -- Ta VCC = 12V (IN1 / 2) H /H Output saturation voltage, VO(sat) -- V VCC = 12V 0.5 0.4 0.3 0.2 H h ig si a de nd L ow sid e Current drain, ICC -- mA 30 20 H / L, L /H 10 0.1 0 0 100 200 300 400 500 600 0 -40 -20 0 20 40 60 80 100 120 140 Output current, IO -- mA Ambient temperature, Ta -- °C No.A2015-5/6 LB1948MC 0.7 VO(sat) -- Ta VCC = 12V High side and Low side Output saturation voltage, VO(sat) -- V 0.6 0.5 0.4 0.3 IO= 4 00mA 300mA 200mA 0.2 100mA 0.1 0 -40 -20 0 20 40 60 80 100 120 140 Ambient temperature, Ta -- °C SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein. 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SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of March, 2012. Specifications and information herein are subject to change without notice. PS No.A2015-6/6