LB1909MC Bi-CMOS integrated circuit 12V Low Saturation Voltage Drive http://onsemi.com Stepper Motor Driver Application Note Overview The LB1909MC is a low saturation voltage stepper motor driver IC. It is optimal for motor drive in 12V system products. Function BIP output transistor adoption (Upper and lower total Vo(sat)=0.5V(typical) at Io=400mA) For one power supply (The control system power supply is unnecessary.) Our motor driver IC, LV8549M, and compatible pin The compact package (SOIC-10 NB) is adopted. VCC max = 20v, IO max = 0.8A Current consumption 0 when standing by Typical Applications Refrigerators Time Recorder Label Printer Vacuum cleaner Refrigerators Time Recorder Pin Assignment Semiconductor Components Industries, LLC, 2013 December, 2013 1/12 LB1909MC Application Note Package Dimensions unit : mm (typ) 4.9 1.0 5 0.41 0.21 1.5 1.75 MAX 1 0.835 0.37 6.0 6 3.9 10 Caution: The package dimension is a 0.175 reference value, which is not a guaranteed value. SANYO : SOIC10 Recommended Soldering Footprint Block Diagram Figure1 One stepping motor drive 2/12 LB1909MC Application Note Specifications Absolute Maximum Ratings at Ta = 25C Parameter Symbol Conditions Ratings Unit Maximum power supply voltage VCC max -0.3 to +20 Applied output voltage VOUT max -0.3 to +20 V V Applied input voltage VIN max -0.3 to +18 V GND pin outflow current IGND Allowable power consumption Pd max Operating temperature Topr -30 to +85 C Storage temperature Tstg -40 to +150 C * 800 mA 820 mW *: When mounted on the specified printed circuit 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. Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Recommended Operating Conditions at Ta = 25C Parameter Symbol Conditions Ratings min typ Unit max Supply voltage VCC 2.5 1.6 V Input high level voltage VIH 1.8 10 V Input low level voltage VIL -0.3 +0.7 V Electrical Characteristics at Ta 25C, VCC = 12V Parameter Power source current Symbol Conditions Ratings min typ Unit max ICC0 ENA=L 0.1 10 A ICC1 ENA=H 25 35 mA Output saturation voltage VOUT1 IOUT=200mA 0.25 0.35 IOUT=400mA 0.50 0.75 V Input current VOUT2 IIN VIN = 5V 85 110 A Ttsd Design guarantee *2 180 C ∆Ttsd Design guarantee *2 60 C V Thermal protection block *1 Thermal shutdown operation temperature Temperature hysteresis width Spark Killer Diode Reverse current IS(leak) Forward voltage VSF IOUT=400mA 30 A 1.7 V *1 The thermal protection function is a feature to prevent the product from smoking and firing under unusual conditions. It is not intended guarantee operation of the product under an ambient temperature exceeding the operating temperature range. *2 Design guarantee is not tested in individual units. 3/12 LB1909MC Application Note 35 2.5 30 2.0 VOUT(V) ICC0,ICC1 (mA) 25 20 15 1.5 1.0 10 ICC1 5 0.5 ICC0 0 0 5 10 15 20 0.0 0 200 VCC (V) 400 600 800 IOUT(mA) Figure 1 Current Drain vs VCC Voltage Figure 2 VOUT vs IOUT (VCC=VIN=12V) 35 450 30 350 25 ICC(mA) 400 IIN(uA) 300 250 20 15 200 150 100 5 IIN(IN1) 50 IIN(IN2) 0 0 0 5 10 15 EN 10 IIN(ENA) 20 VIN(V) 0 0.5 1 1.5 2 VIN (V) 2.5 3 3.5 Figure 4 VOUT vs VIN (VCC=12V) Figure 3 IIN vs VIN 14 12 VOUT(V) 10 8 6 IN1 4 IN2 2 0 0 0.5 1 1.5 2 VIN (V) 2.5 3 3.5 Figure 5 VOUT vs VIN (VCC=12V) 4/12 LB1909MC Application Note 40 1.0 35 200mA 0.8 30 300mA 400mA Vo(sat)(V) ICC1(mA) 100mA 25 20 15 0.6 0.4 10 0.2 5 0 -50 0 50 100 Temp(deg) Figure 6 Current drain vs Temperature(VCC=12V) 150 0.0 -50 0 50 100 150 Temp(deg) Figure 7 VOUT vs Temperature (VCC=VIN=12V) 5/12 LB1909MC Application Note Pin function Pin No. 1 Pin name VCC Pin function Power-supply voltage pin. VCC voltage is impressed. The permissible operation voltage is from 2.5 to 16(V). The capacitor is connected for stabilization for GND pin (6pin). 2 ENA Motor drive control input pin. It shifts from the stand-by state to a prescribed output operation corresponding to the state of the input when the ENA pin becomes a standby mode by L, the circuit current can be adjusted to 0, and it makes it to H. It is a digital input, and the range of L level input is 0 to 0.7(V) and the range of H level input are 1.8 to 10(V). Pull-down resistance 80(kΩ) is built into in the terminal. 3 IN1 Motor drive control input pin. Driving control input pin of OUT1 (10pin) and OUT2 (9pin). With built-in pull-down resistance. 4 IN2 Motor drive control input pin. Driving control input pin of OUT3 (8pin) and OUT4 (7pin). With built-in pull-down resistance. 5 6 7 NC GND OUT4 8 OUT3 Driving output pin. The motor coil is connected between terminal OUT4 (7pin). 9 OUT2 Driving output pin. The motor coil is connected between terminal OUT1 (10pin). 10 OUT1 Driving output pin. The motor coil is connected between terminal OUT2 (9pin). Equivalent Circuit Ground pin. Driving output pin. The motor coil is connected between terminal OUT3 (8pin). 6/12 LB1909MC Application Note Operation explanation 1. Truth table Input ENA L H Output IN1 IN2 OUT1 OUT2 OUT3 OUT4 * * OFF OFF OFF OFF L H L H L H Remarks Standby mode Channel 1 L H L H L H Channel 2 Forward Reverse Forward Reverse 2. Thermal shutdown function The thermal shutdown circuit is incorporated and the output is turned off when junction temperature Tj exceeds 200C. As the temperature falls by hysteresis, the output turned on again (automatic restoration). The thermal shutdown circuit does not guarantee the protection of the final product because it operates when the temperature exceed the junction temperature of Tjmax=150C. TSD = 200C (typ) TSD = 75C (typ) (1) Thermal shutdown temperature The thermal shutdown temperature Ttsd is 200±20C 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 200C. When the chip temperature Tj is in the direction of decreasing (dotted line), the output turns on (returns) at approximately 125C. 7/12 LB1909MC Application Note (Thermal shutdown circuit block diagram) 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. Note: The above is an example of thermal shutdown circuits although ther are same differences from the actual internal circuit. Design Documentation (1) Voltage magnitude relationship There are no restrictions on the magnitude relationships between the voltage applied to Vcc and ENA,IN1,IN2. (2) 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 LB1909MC are mounted on different printed circuit boards and the ground potentials differ significantly. Timing Chart - Full-Step (2phase excitation) drive- 8/12 LB1909MC Application Note Operation principal Full-Step Drive Motor advances 90 degree by inputting 1 step. Phase A + Phase B + (1) Phase A + Phase B – (4) 90deg (3) (2) Phase A – Phase B – Figure 1. Full-Step Timing Phase A – Phase B + Figure 2. Motor electric angle (Full Step Drive) Application Circuit Example 1. Example of applied circuit when one stepping motor driving M LB1909MC C1 + Logic Input * Bypass capacitor (C1) connected between VCC-GND of all examples of applied circuit recommends the electric field capacitor of 0.1A to 10A. Confirm there is no problem in operation in the state of the motor load including the temperature property about the value of the capacitor. Mount the position where the capacitor is mounted on nearest IC. 9/12 LB1909MC Application Note Evaluation Board Manual 1. Evaluation Board circuit diagram Motor connection terminal C1:10µF VIN （power supply input terminal for switches ） Bill of Materials for LB1909MC Evaluation Board Footprint Manufacturer Manufacturer Part Number Substitution Allowed Lead Free SOIC-10 NB ON semiconductor LB1909MC No Yes SUN Electronic Industries 50ME10HC Yes Yes Switch MIYAMA MS-621-A01 Yes Yes Test points MAC8 ST-1-3 Yes Yes Designator Qty Description IC1 1 Motor Driver C1 1 VCC Bypass capacitor SW1-SW3 3 TP1-TP11 11 Value 10µF 50V Tol ±20% 10/12 LB1909MC Application Note 2. One stepping motor drive M “VCC” Power Supply C1:VCC Bypass capacitor （Electrolytic capacitor） 10μF “VIN” Power Supply Function generator Connect a stepping motor with OUT1, OUT2, OUT3 and OUT4. Connect the motor power supply with the terminal VCC, the control power supply with the terminal VIN. Connect the GND line with the terminal GND. STP motor drives it in a Full-Step, Half-Step by inputting a signal such as follows into IN1~IN4. For input signal to function generator, refer to p.8. To reverse motor rotation, make sure to input signal to outward direction. Waveform of LB1909MC evaluation board when driving stepping motor Full-Step Drive LB1909MC Full-Step (VCC=12V, 200pps) High Low Low High High Low Ch1 IN1 10V/div High Low Ch2 IN2 10V/div Low Ch3 VOUT1 10V/div Ch4 IOUT1 200mA/div T=5ms/div LB1909MC Full-Step (VCC=12V, 500pps) Ch1 IN1 10V/div Ch2 IN2 10V/div High Ch3 VOUT1 10V/div High Low *1 Ch4 IOUT1 200mA/div T=5ms/div *1. When the motor rotation is at a high speed, current gradient increases by the inductance of motor (L). 11/12 LB1909MC Application Note ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of SCILLC’s product/patent coverage may be accessed at www.onsemi.com/site/pdf/Patent-Marking.pdf. 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