LB1940T

Ordering number : EN7232A LB1940T LB1940U Overview Monolithic Digital IC 2-ch H-Bridge Constant Current Driver The LB1940T and LB1940U are 2-phase exciter type bipolar stepping motor driver ICs that feature low-voltage, (supporting 3V battery) and low current operation with low saturation voltage. These ICs enable constant-current control of actuators, and are optimal for driving the actuators of PC peripherals such as USB compatible scanners, FDDs, and printers, as well as for controlling the shutter, iris, and AF of a digital still camera. Features • Low-voltage driving 2-power source type: VS = 1.6 to 7.5V, VDD = 1.9 to 6.5V Single power source type: VS = VDD = 1.9 to 7.5V • Low saturation output: VO(sat) = 0.3V at IO of 200mA • Constant-current control • Built-in reference voltage (Vref = 0.9V) • Small-sized, low-profile package (LB1940T: TSSOP20; 225mil; thickness (t) = 1.2mm max.) (LB1940U: MSOP20; thickness (t) = 0.85mm max.) Specifications Absolute Maximum Ratings at Ta = 25°C Parameter Maximum supply voltage Output applied voltage Output Current Input applied voltage Allowable power dissipation Operating temperature Storage temperature Symbol VB max VOUT max IO max VIN max Pd max Topr Tstg ENA1, ENA2, IN1, IN2, VC Mounted on a specified board * VS1, VS2, VDD OUT1, OUT2, OUT3, OUT4 Conditions Ratings -0.3 to +10.5 -0.3 to +10.5 400 -0.3 to +10.5 800 -20 to +85 -55 to +150 Unit V V mA V mW °C °C * Mounted on a Specified board: 114.3mm×76.1mm×1.6mm, glass epoxy Any and all SANYO Semiconductor products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft's control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO Semiconductor representative nearest you before using any SANYO Semiconductor products described or contained herein in such applications. SANYO Semiconductor 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 products described or contained herein. D2706 MS IM / 93004 JO IM No.7232-1/8 LB1940T/1940U Allowable Operating Range at Ta = 25°C Parameter Function-guaranteed voltage range Symbol VOPR1 VOPR2 Low level input threshold voltage High level input threshold voltage VC input voltage VIL VIH VC Conditions VDD system, VS = 2.0V VS system, VDD = 5.0V ENA1, ENA2, IN1, IN2 ENA1, ENA2, IN1, IN2 Ratings min 1.9 1.6 -0.3 2.0 0.19 typ max 6.5 7.5 1.0 6.0 1.0 V V V unit V Electrical Characteristics at Ta = 25°C, VS = 3V, VDD = 5V Parameter Standby current dissipation Regulator output circuit VREF output voltage SVDD output voltage H bridge output circuit OUT output saturation voltage (at saturation control) VO(sat)2 OUT output current (at constant current control) IOUT2 VC = IOUT1 VO(sat)1 VDD = 5.0V, VS = 2.0V IO = 200mA (PNP side) VDD = 5.0V, VS = 2.0V IO = 200mA (NPN side) VDD = 6.0V, VC = 0.2V, VS = 3.5V RL = 5Ω (between OUT-OUT), RFB = 2Ω Rb Ra + Rb VREF (Ra = 70kΩ, Rb = 20kΩ) * Symbol ISTB VS = VDD = 6.5V Conditions Ratings min typ 0.1 max 1.0 unit µA VREF VSVDD IOL = 0 to 1mA IOL = 10mA 0.85 4.70 0.9 4.85 0.95 V V 0.20 0.10 0.30 0.15 V V 94 180 100 200 106 220 mA mA VDD = 6.0V, VS = 2.0V RL = 5Ω (between OUT-OUT), RFB = 1Ω VS system operating current consumption VDD system operating current dissipation IDD1 VC = IS1 VC = Rb Ra + Rb Rb Ra + Rb 1.5 VREF (Ra = 70kΩ, Rb = 20kΩ) * 4 VREF (Ra = 70kΩ, Rb = 20kΩ) * 7 mA 3 mA ENA1 = 2V VC input current IVC VDD = 6.0V, VS = 2.0V, VC = 1.9V 0 -1 µA µA Control input circuit Control pin maximum input current IIH IIL * For Ra and Rb, refer to Application Circuit Diagram. VIH = 5.5V VIL = GND -1 80 100 0 No.7232-2/8 LB1940T/1940U Package Dimensions unit : mm (typ) 3246 6.5 20 11 Package Dimensions [LB1940T] 0.5 unit : mm (typ) 3262 5.2 20 11 [LB1940U] 4.4 6.4 4.4 6.3 (1.0) 1.2max 0.65 (0.3) 1 0.22 10 0.15 1 (0.35) 0.5 0.2 10 0.125 SANYO : TSSOP20(225mil) 0.08 SANYO : MSOP20(225mil) 1000 Pd max - Ta Mounted on a Specified board: 114.3mm×76.1mm×1.6mm glass epoxy Allowable Power Dissipation, Pd max - mW 800 800mW 600 400 200 0 LB1940T/U --20 0 20 40 60 80 100 ILB01486 Ambient Temperature, Ta- °C True Table Input ENA 1 L H 2 L H L H A blank means “don’t care”. H L L H H L L H A blank means “off”. H L on on on on 1 IN 2 1 2 Output OUT 3 4 Standby (current dissipation zero) Reverse rotation Forward rotation Reverse rotation Forward rotation SVDD Mode (0.65) 0.85max 0.08 0.5 No.7232-3/8 LB1940T/1940U Pin Assignment 1 2 VS1 1 SVDD 2 S-GND 19 SVDD VDD 3 VC2 3 4 18 V DD 17 OUT1 16 RFG1 OUT1 4 RFG1 5 OUT2 6 OUT3 7 15 OUT2 RFG2 8 IN1 IN2 FC1 7 14 OUT3 13 RFG2 12 OUT4 11 VS2 OUT4 9 VS2 10 13 IN2 12 FC1 11 FC2 18 VC2 17 Vref 16 ENA1 20 VC1 19 S-GND VC1 20 VS1 Vref ENA1 LB1940U 5 15 ENA2 14 IN1 LB1940T ENA2 6 8 9 Top view FC2 10 Top view Pin Description Pin No. LB1940T 1 2 3 4 5 6 7 8 9 10 LB1940U 20 19 18 17 16 15 14 13 12 11 Pin Name VC1 S-GND VC2 Vref ENA1 ENA2 IN1 IN2 FC1 FC2 Description Reference voltage input for 1ch control GND for control system Reference voltage input for 2ch control Reference voltage output Signal input for 1ch control Signal input for 2ch control Signal input for 1ch control Signal input for 2ch control C connection pin for 1ch phase compensation C connection pin for 2ch phase compensation 10 1 VS1 Motor power supply (+) 4 5 6 7 8 9 7 6 5 4 3 2 OUT3 OUT2 RFG1 OUT1 VDD SVDD Motor drive output 3 Motor drive output 2 Constant-current detection pin 1 Motor drive output 1 Control system power supply (+) Control system power output 2 3 9 8 OUT4 RFG2 Motor drive output 4 Constant-current detection pin 1 Pin No. LB1940T LB1940U 10 Pin Name VS2 Description Motor power supply (+) No.7232-4/8 Block Diagram VC1 OUT2 OUT4 VDD OUT3 VS2 VS1 OUT1 VC2 VDD-SW 300Ω S-GND ENA1 ENA2 300Ω + -Reference voltage logic circuit LB1940T/1940U + -- 65kΩ 80kΩ 80kΩ 80kΩ 65kΩ 65kΩ 80kΩ 65kΩ FC1 RFG1 IN1 IN2 VREF SVDD RFG2 FC2 No.7232-5/8 LB1940T/1940U Application Circuit Diagram VDD ENA1 VS2 VS1 OUT1 ENA2 IN1 IN2 S-GND SVDD OUT2 CPU LB1940T LB1940U OUT3 OUT4 FC1 FC2 Vref Ra Rb VC1 VC2 RFG1 RfB RFG2 RfB At constant-current control: The OUT current is controlled so that the RFG pin voltage is equal to the VC input pin voltage. For example, IOUT = 200mA (= 0.2V/1Ω) when VC = 0.2V and RFB = 1Ω. *: There is no priority relationship between respective input voltages (ENA, IN) and respective supply voltages (VDD, VS). For example, operation with VIN = 5V, VDD = 3V, VS = 2V is possible. Note: The input voltage range to the reference voltage input pin VC for constant-current setting is from 0.19V to 1.0V. Constant current setting The composition of the constant-control circuit of this IC is as shown in the figure below. The voltage entered in the VC pin is entered as a reference to the “+” side input of the constant-current control amplifier. The “-” side of this constant-current control amplifier is connected to the RFG pin via the wire bonded resistor Rb (= 0.1Ω). The constant-current control circuit consists of comparison of the voltage generated at the external current detection resistor with the above reference voltage. In addition, since the bias current Ib (= 1.5µA) flows out of the positive (+) input of the constant current control amplifier during the constant current control, if the voltage is input to the VC pin by dividing the VREF voltage by 4.5 according to the dividing resistance (70kΩ and 20kΩ) as shown in the figure, the formula for calculating the VC voltage is as follows : VC = VREF/4.5+Ib×20kΩ = VREF/4.5+0.03 Therefore, the theoretical equation to set the constant current IOUT is as follows: IOUT = VC/(RFB+Rb) = (VREF/4.5+0.03)/(RFB+Rb) No.7232-6/8 LB1940T/1940U No.7232-7/8 LB1940T/1940U Specifications of any and all SANYO Semiconductor 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. SANYO Semiconductor Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or 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. 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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for volume production. SANYO Semiconductor 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 December, 2006. Specifications and information herein are subject to change without notice. PS No.7232-8/8