LB1937T

Ordering number : EN7231 Monolithic Digital IC LB1937T Overview 1-2 Phase Excitation Stepping Motor Driver The LB1937T is a 2-phase bipolar drive stepping motor driver IC that supports low-voltage drive and can drive two stepping motors at the same time. The LB1937T's miniature package and minimal number of external components reduces the required mounting area. It also provides high-efficiency motor drive and can reduce circuit current consumption. Since it provides a current detection pin and supports PWM control input, it can be used to implement current chopper control at the system level. The LB1937T is optimal for the stepping motors used for lens drive in digital cameras, printers, and movie cameras. Functions and Features • Low saturation voltage forward/reverse motor driver (VO sat = 0.3V at IO = 200mA) • Four H-bridge channels • Wide usable voltage range (Allowable voltage range: 2.5V to 9.5V, absolute maximum rating: 10.5V) • Supports PWM input (Low power consumption can be achieved in slow delay mode that uses IN1/IN2 = H/H logic.) • Motor (coil) current detection pin • Built-in thermal shutdown circuit • Thin form factor miniature package (TSSOP24) 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 (home appliances, AV equipment, communication device, office equipment, industrial equipment etc.). 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 applications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us 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. 32207 TI PC B8-5899,7386 No.7231-1/7 LB1937T Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Symbol VCC max VS max Maximum output voltage Input voltage Ground pin source current Allowable power dissipation Operating temperature Storage temperature VOUT max VIN max IGND max Pd max Topr Tstg Per channel When mounted on a circuit board * Conditions Ratings -0.3 to +10.5 -0.3 to +10.5 VS+ VSF -0.3 to +8.0 800 1100 -30 to +85 -40 to +150 Unit V V V V mA mW °C °C * Specified circuit board : 114.3 × 76.1 × 1.6mm3, glass epoxy Allowable Operating Range at Ta = 25°C Parameter Supply voltage Symbol VCC VS High-level input voltage Low-level input voltage VIH VIL Conditions Ratings 2.5 to 9.5 2.5 to 9.5 2.0 to 7.5 -0.3 to 0.7 V V Unit V Electrical Characteristics at Ta = 25°C, VCC = VS = 5V Parameter VCC system power supply current VS system power supply current Symbol ICC0 ICC1 IS0 IS1 Output saturation voltage VOUT1 VOUT2 Input current Spark killer diode Reverse current Forward voltage IS(leak) VSF IOUT = 400mA 30 1.7 μA V IIN IN1 to IN8 = 0V IN1 = IN3 = 3V IN1 to IN8 = 0V IN1 = IN3 = 3V VCC = VS = 3V to 7.5V, VIN = 3V or 0V, IOUT = 200mA (High and low side) VCC = VS = 4V to 7.5V, VIN = 3V or 0V, IOUT = 400mA (High and low side) VIN = 5V Conditions Ratings min typ 0.1 10 0.1 13 0.3 0.6 150 max 5 16 5 19 0.4 0.8 200 Unit μA mA μA mA V V μA No.7231-2/7 LB1937T Package Dimensions unit:mm (typ) 3260A Allowable power dissipation, Pd max – mW 1200 1100 1000 Pd max – Ta Mounted on the specified circuit board 6.5 24 13 800 4.4 6.4 572.00 600 0.5 1 0.5 (0.5) 0.22 12 0.15 400 (1.0) 1.2max 200 Specified circuit board : 114.3 × 76.1 × 1.6mm3 glass epoxy board 0 20 40 60 80 100 0 -40 -30 -20 Ambient temperature, Ta – °C 0.08 SANYO : TSSOP24(225mil) Pin Assignment VS V CC IN1 IN2 IN3 IN4 S -GND IN5 IN6 IN7 1 2 3 4 5 6 24 23 22 P-GND (NC) OUT1 21 OUT2 20 OUT3 19 OUT4 18 P-GND 17 OUT5 LB1937T 7 8 9 10 16 OUT6 15 OUT7 OUT8 P -GND IN8 11 V S 12 Top view 14 13 No.7231-3/7 LB1937T Block Diagram 1 0μ F VCC VS IN1 30kΩ 30kΩ OUT1 Stepping Motor 1 0μ F OUT2 IN2 30kΩ 30kΩ IN3 30kΩ 30kΩ OUT3 IN4 30kΩ Control block 30kΩ OUT4 IN5 30kΩ 30kΩ VS Stepping Motor OUT5 IN6 30kΩ 30kΩ OUT6 IN7 30kΩ 30kΩ IN8 Thermal shutdown 30kΩ 30kΩ OUT7 OUT8 S-GND P-GND LB1937T Top view P-GND No.7231-4/7 LB1937T Truth Table Input IN1 L L H H (*) IN2 L H L H (*) L L H H (*) L H L H (*) L L H H (*) L H L H (*) L L H H (*) L : low, H : high *: The output logic mode when IN1/IN2 = H/H is determined by the immediately preceding IN1/IN2 mode. The post-switching output modes will be as follows. When switching from (2): (4) When switching from (3): (4)' When switching from (1): Undefined (Either (4) or (4)') The modes when IN3/IN4 = H/H operate similarly as described below. When switching from (6): (8) When switching from (7): (8)' When switching from (5): Undefined (Either (8) or (8)') L H L H (*) IN3 IN4 IN5 IN6 IN7 IN8 OUT1 off L H off H OUT2 off H L H off off L H off H off H L H off off L H off H off H L H off off L H off H off H L H off OUT3 Output OUT4 OUT5 OUT6 OUT7 OUT8 Output mode (1) (2) (3) (4) (4)′ (5) (6) (7) (8) (8)′ (11) (12) (13) (14) (14)′ (15) (16) (17) (18) (18)′ No.7231-5/7 LB1937T 20 ICC -- VCC 20 IS -- VS Supply current, ICC – mA 15 Supply current, IS – mA 0 1 2 3 4 5 6 7 8 9 10 15 10 10 5 5 0 0 0 1 2 3 4 5 6 7 8 9 10 Supply voltage, VCC – V 250 Supply voltage, VS – V 0.75 IIN -- VIN Output saturation voltage, VO(sat) – V VO(sat) -- IO Input current, IIN – μA 200 0.50 150 100 IN 1 to IN 8 0.25 Hi gh an ow dl sid e 50 0 0 1 2 Input voltage, VIN – V 3 4 5 6 7 8 9 0 0 100 200 300 400 25 ICC -- Ta Output current, IO – mA 15.0 500 IS -- Ta Supply current, ICC – mA Supply current, Is – mA 20 12.5 10.0 15 7.5 10 5.0 5 2.5 0 -40 -20 0 20 40 60 80 100 120 140 0 -40 -20 0 20 40 60 80 100 120 140 Ambient temperature, Ta – °C Output saturation voltage, VO(sat) – V 0.7 VO(sat) -- Ta High and low side Ambient temperature, Ta – °C 0.6 0.5 0.4 0.3 0.2 -40 -20 0 20 40 60 80 100 120 140 Ambient temperature, Ta – °C No.7231-6/7 LB1937T 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 March, 2007. Specifications and information herein are subject to change without notice. PS No.7231-7/7