Ordering number : ENA2041 Monolithic Digital IC LB1938FA 1ch, Low-saturation Forward/Reverse Motor Driver Overview The LB1938FA is an H-bridge motor driver that supports low-voltage drive and features low-saturation outputs in an ultraminiature slim package. The LB1938FA provides forward, reverse, brake, and standby modes controlled by two input signals, and is an optimal DC motor driver for notebook personal computers, digital cameras, cell phones, and other portable equipment. Features • Ultraminiature Micro8 package • The low saturation voltage means that the voltage applied to the motor is higher and IC heat generation is reduced. This allows this IC to be used in environments with higher ambient operating temperatures. Output saturation voltage (high side + low side): VOsat = 0.15V typical (IO = 100mA) • The wide usable voltage range and the low standby mode current drain of 0.1 µA make this IC optimal for battery operated equipment. • There are no constraints on the relationship between the input signal voltage and the supply voltage. For example, this IC can be use at VCC = 3V and VIN = 5V. • Thermal protection circuit limits the drive current and prevents the IC from causing a fire or being destroyed if the IC chip temperature reaches or exceeds 180°C due to large currents flowing when the outputs are shorted due to, for example, motor layer shorting or other phenomena. Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC max 10.5 V Output current IOUT max 800 mA Output voltage VOUT max VCC+VSF V 10 V Input applied voltage VIH max Continued on next page. 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. 40412 SY 20120321-S00010 No.A2041-1/5 LB1938FA Continued from preceding page. Parameter Symbol Allowable power dissipation Pd max Conditions Ratings Unit Mounted on a specified board * 400 mW Operating temperature range Topr -30 to +85 °C Storage temperature range Tstg -55 to +150 °C Note *: Mounted on a specified board: 114.3mm×76.1mm×1.5mm, glass epoxy resin, wiring density 20% 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. Allowable Operating Range at Ta = 25°C Parameter Symbol Conditions Ratings Unit Supply voltage VCC 2.2 to 10 Input high-level voltage VIH 2.0 to 9.5 V Input low-level voltage VI L -0.3 to +0.3 V V Electrical Characteristics at Ta = 25°C, VCC = 3V Ratings Parameter Symbol Conditions Unit min Circuit current Output saturation voltage typ max ICC1 Standby 0.1 5 μA ICC2 Forward/reverse drive 14 19 mA ICC3 Brake 20 29 mA 0.15 0.2 V 0.35 0.5 V V VOsat1 Upper+lower IO = 100mA for forward/reverse rotation VOsat2 Upper+lower IO = 300mA for forward/reverse rotation Upper IO = 100mA for braking 0.1 0.15 Spark killer diode forward voltage VOsat3 VSF IO = 300mA 0.9 1.7 V Spark killer diode inverse current IRS VOUT = 10V 0.1 5 μA IIN VIN = 5V 75 98 μA Input current Thermal protection operating TSD Design target value * °C 180 temperature Note *: Design target value: Measurement with a single unit not made. Package Dimensions unit : mm (typ) 3427 3.0 Pd max - Ta 8 1 2 0.65 0.18 0.08 1.1 MAX 0.33 Allowable Power Dissipation, Pd max - mW 0.55 4.9 3.0 700 600 500 400 Mounted on a specified board 114.3mm×76.1mm×1.5 mm, glass epoxy resin 300 208 200 100 0 -30 0 30 60 90 120 Ambient Temperature, Ta - C SANYO : Micro8 No.A2041-2/5 LB1938FA Pin Assignment VCC 1 IN1 2 8 P-GND 7 OUT1 LB1938FA IN2 3 6 OUT2 S-GND 4 5 NC Top view S-GND: GND for the control system P-GND: GND for the power system Truth Table IN1 IN2 OUT1 OUT2 Mode L L OFF OFF Standby H L H L Forward rotation L H L H Reverse rotation H H H H Brake Sample Application Circuit VCC 1 IN1 2 Control block OUT1 CPU IN2 7 M 6 3 OUT2 S-GND 4 8 P-GND Cautions: • VCC and GND lines suffer substantial fluctuation in the current quantity, causing a problem of line oscillation in certain cases. In this case, take following points into account: (1) Use a thick and short wiring to reduce the wiring inductance. (2) Insert a capacitor with satisfactory frequency characteristics near IC. (3) Connect S-GND to the control system GND on the CPU side and P-GND to the power system GND. No.A2041-3/5 LB1938FA VO(sat) - IO 0.4 0.3 0.2 0.1 0 0 100 200 300 400 VO(sat) - Ta 0.5 VCC = 3V Output saturation voltage, VO(sat) - V Output saturation voltage, VO(sat) - V 0.5 VCC = 3V 0.4 00mA IO = 3 0.3 0.2 A IO = 100m 0.1 0 -40 500 -20 0 ICC - Tc 28 20 40 60 80 100 120 140 Ambient temperature, Ta - °C Output current, IO - mA ICC - VCC 28 24 VCC = VIN 24 e 20 16 Bra k VC e mode C =5 V 12 Forw ard o r reve 8 rse m ode, V CC = 5V 3V 4 Current drain, ICC - mA Current drain, ICC - mA Brake mod 20 Forward or 16 e IN1 reverse mod IN2 12 8 4 3V 0 -40 160 0 -20 0 20 40 60 80 100 120 0 140 1 2 3 4 5 6 7 8 9 10 Case temperature, Tc - °C Supply voltage, VCC - V IIN - VIN ICC Standby Mode Temperature Characteristics 2.0 VCC = 3V VCC = 11V 1.6 120 1.2 80 0.8 40 0.4 0.29 0 0 1 2 3 4 5 6 7 8 9 10 0 -40 -20 0 20 40 60 80 100 120 140 Case temperature, Tc - °C Input voltage, VIN - V IN Pin Input Current Temperature Characteristics 100 VIN = 5V 80 60 40 20 0 -40 -20 0 20 40 60 80 100 120 140 Case temperature, Tc - °C No.A2041-4/5 LB1938FA 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 April, 2012. Specifications and information herein are subject to change without notice. PSNo.A2041-5/5