LB1948M_09

Ordering number : EN7714A Monolithic Digital IC LB1948M Overview 12V Low Saturation Voltage Drive Forward/Reverse Motor Driver The LB1948M is a 2-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 2-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 max1 Pd max2 Operating temperature Storage temperature Topr Tstg Per channel Independent IC Mounted on a specified board* Conditions Ratings -0.3 to +20 -0.3 to +20 -0.3 to +18 800 350 870 -20 to +85 -40 to +150 Unit V V V mA mW mW °C °C Maximum supply voltage Output voltage Input voltage Ground pin source current Allowable power dissipation * Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board. 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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. http://semicon.sanyo.com/en/network D2408 MS / 31004TN (OT) No.7714-1/6 LB1948M 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 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 Ratings 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) 3086B 1.0 Pd max -- Ta Specified board: 114.3×76.1×1.6mm3 glass epoxy board. 10 6 0.63 5.0 Allowable power dissipation, Pd max -- W 0.87 0.8 4.4 6.4 0.6 0.45 0.4 0.35 Independent IC 1.7max 1 5 0.15 0.2 0.1 (1.5) 0.18 0.35 1.0 (0.5) 0 -20 0 20 40 60 80 85 100 Ambient temperature, Ta -- °C SANYO : MFP10S(225mil) Pin Assignment VCC 1 IN1 2 IN2 3 IN3 4 IN4 5 Top view 10 OUT1 9 OUT2 LB1948M 8 OUT3 7 OUT4 6 GND No.7714-2/6 LB1948M 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 OUT2 OFF OFF L H L OFF H L L OFF L H L 2CH 1CH OUT3 OFF OUT4 OFF Standby mode Standby mode Forward Reverse Brake Standby mode Forward Reverse Brake Notes 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.7714-3/6 LB1948M 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 LB1948M 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 3 IN2 4 IN3 5 IN4 OUT1 10 M OUT2 9 LB1948M OUT3 8 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 LB1948M are mounted on different printed circuit boards and the ground potentials differ significantly. 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 LB1948M 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 200 220 180 Chip temperature, Tj -- °C No.7714-4/6 LB1948M 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.7714-5/6 LB1948M 0.7 VO(sat) -- Ta VCC = 12V High side and Low side Output saturation voltage, VO(sat) -- V 0.6 0.5 IO= 4 00mA 0.4 300mA 200mA 0.3 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. SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. In the event that any or all SANYO Semiconductor Co.,Ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. 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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 December, 2008. Specifications and information herein are subject to change without notice. PS No.7714-6/6