LB1973JA Monolithic Digital IC http://onsemi.com Two-channel H-Bridge Driver Application Note Overview The LB1973JA is a two-channel H-bridge driver that supports for low saturation draive operation. It is optimal for H-bridge drive of stepping motors (AF and zoom) in portable equipment such as camera cell phones. Also LB1973JA is suitable for use with gas burner for its latch valve drive. The latch valve functions as a safety device to prevent gas leakage. Function Two-channel H-bridge driver The range of the operation voltage is wide. (1.8V to 7.5V) Small package: SSOP16 (225mil) Built-in thermal protection Typical Applications Projector Security camera Label Printer Stove Burner POS, Card Terminal Pin Assignment VCC 1 16 NC 2 15 OUT4 IN4 3 14 OUT3 IN3 4 13 NC 5 12 OUT1 IN1 6 11 OUT2 NC NC IN2 7 10 NC NC 8 9 GND (Top View) Semiconductor Components Industries, LLC, 2013 December, 2013 1/12 LB1973JA Application Note Package Dimensions unit : mm (typ) Mount on board (114.3mm×76.1mm×1.6tmm glass epoxy) Recommended Soldering Footprint (Unit:mm) Reference Symbol eE SSOP16 (225mil) 5.80 e 0.65 b3 0.32 l1 1.0 Block Diagram VCC IN1 30K OUT2 30K 100K IN3 30K 100K Control Block Circuit IN2 Thermal shutdown circuit 100K OUT1 OUT4 OUT3 IN4 30K 100K GND 2/12 LB1973JA Application Note Application Circuit Example 1. Example of applied circuit with two Latch valve driving 2. Example of applied circuit with one stepping motor driving 3. Example of applied circuit when connecting it in parallel (one latch valve application) Specifications Absolute Maximum Ratings at Ta = 25C Parameter Maximum supply voltage Output voltage Input voltage Ground pin source current Allowable power dissipation Symbol Conditions VCC max VOUT max VIN max IGND CONT, IN Per channel Ratings Unit -0.3 to +8.0 V -0.3 to VCC+VSF V -0.3 to +8.0 1000 V mA Pd max1 For Unit 350 mW Pd max2 Mounted on a circuit board.* 870 mW Operating temperature Topr -20 to +85 C Storage temperature Tstg -40 to +150 C * Mounted on a Specified board : 114.3mm76.1mm1.6mm, glass epoxy 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. 3/12 LB1973JA Application Note Recommended Operating Conditions at Ta 25C Parameter Symbol Conditions Ratings min typ Unit max Supply voltage VCC 1.8 7.5 V High-level input voltage VIH 1.3 7.5 V Low-level input voltage VIL -0.3 +0.5 V Electrical Characteristics at Ta = 25°C, VCC = 1.9V Parameter Source current Symbol Conditions typ Unit max A ICCO1 VCC = 1.9V,IN1 to IN4 = 0V 0.01 1 ICCO2 VCC = 3V,IN1 to IN4 = 0V 0.01 1 A ICC1 IN1 = 1.9V,IN2 to IN4 = 0V 18 25 mA ICC2 Output saturation voltage1 Ratings min VOUT11 IN1 = 3V,IN2 to IN4 = 0V,VCC = 3V 19 26 mA IOUT = 270mA,VCC = 1.9V to 3.6V,VOUT = 0.2 0.3 V 0.25 0.4 V 0.12 0.2 V 0.2 0.35 V 32 70 A Upper Tr and Under Tr (single connection) IN1 = 1.3V,IN2 to IN4 = 0V Supplementation: Standard similar as for IN2 to IN4 = 1.3V VOUT12 IOUT = 350mA,VCC = 1.9V to 3.6V,VOUT = Upper Tr and Under Tr IN1 = 1.3V,IN2 to IN4 = 0V Supplementation: Standard similar as for IN2 to IN4 = 1.3V Output saturation voltage2 VOUT21 IOUT = 270mA,VCC = 1.9V to 3.6V,VOUT = Upper Tr and Under Tr (parallel connection) OUT1-3,OUT2-4 short. IN1 and IN3 = 1.3V,IN2 and IN4 = 0V Supplementation: Standard similar as for IN2 and IN4 = 1.3V VOUT22 IOUT = 500mA,VCC = 1.9V to 3.6V,VOUT = Upper Tr and Under Tr OUT1-3,OUT2-4 short. IN1 and IN3 = 1.3V,IN2 and IN4 = 0V Supplementation: Standard similar as for IN2 and IN4 = 1.3V Input current Themal shutdown operation IIN VIN = 1.9V Ttsd 140 C ∆T 20 C temperature Temperature hysteresis width Spark killer Diode Reverse current IS(leak) VCC-OUT = 8V,VIN = 0V 10 A Forword voltage VSF IOUT = 400mA,VIN = 0V 1.7 V 4/12 LB1973JA Application Note 5/12 LB1973JA Application Note Pin function Pin No. 1 6 Pin name VCC Pin function Power-supply voltage pin. VCC voltage is impressed. The permissible operation voltage is from 2.5 to 9.0(V). The capacitor is connected for stabilization for GND pin (7pin, 14pin). IN1 Motor drive control input pin. Driving control input pin of OUT1 (12pin) and OUT2 (11pin). It combines with IN2 pin (7pin) and it fights desperately. The digital input it, range of the "L" level input is 0 to 0.7(V), range of the "H" level input is from 1.8 to 9.0(V). PWM can be input. Pull-down resistance 30(kΩ) is built into in the pin. It becomes a standby mode because all IN1, IN2, IN3, and IN4 pins are made "L", and the circuit current can be adjusted to 0. 7 IN2 Motor drive control input pin. Driving control input pin of OUT1 (12pin) and OUT2 (11pin). It combines with IN1 pin (6pin) and it uses it. PWM can be input. With built-in pull-down resistance. 3 IN3 Motor drive control input pin. Driving control input pin of OUT3 (14pin) and OUT4 (15pin). It combines with IN4 pin (3pin) and it uses it. PWM can be input. With built-in pull-down resistance. 2 IN4 6 15 GND OUT4 Motor drive control input pin. Driving control input pin of OUT3 (14pin) and OUT4 (15pin). It combines with IN3 pin (4pin) and it uses it. PWM can be input. With built-in pull-down resistance. Ground pin. Driving output pin. The motor coil is connected between terminal OUT3 (14pin). 14 OUT3 Equivalent Circuit 30KΩ VCC Driving output pin. The motor coil is connected between terminal OUT4 (15pin). 11 OUT2 Driving output pin. The motor coil is connected between terminal OUT1 (12pin). 12 OUT1 Driving output pin. The motor coil is connected between terminal OUT2 (11pin). OUT1 (OUT3) OUT2 (OUT4) GND 6/12 LB1973JA Application Note Operation explanation 1. LB1973JA Input-Output-Logic Truth Table Input IN1 Low IN2 Low High Low Low High - - IN3 Low IN4 Low - - High High - High - OUT1 Off Output OUT2 OUT3 Off Off High Low Low High - - Low Low High High High OUT4 Off - - High Low Low High Mode Standby mode Channel 1, forward Channel 1, reverse Channel 2, forward Channel 2, reverse The logic output for the first high-level input is produced. 2. Latch valve operation sequence The following diagram shows the example of latch valve sequence from Standby, Forward, Reverse, Forward, and Reverse. When IN1, IN2, IN3, IN4 are "L", the operation of LB1973JA is stopped. Please put standby mode for 10usec between Forward and Reverse. 3. Stepping motor operation sequence Example of current wave type in each excitation mode when stepping motor parallel input is controlled. 2 phase excitation 1-2 phase excitation 7/12 LB1973JA Application Note STEP STEP STEP STEP STEP STEP 4. Theory Full-Step MODE The motor moves 90 degrees in an electric corner when I input 1Step. Phase A + Phase B + Phase A + Phase B – Steps by 90deg ① ④ IN1 IN2 IN3 90deg IN4 ④ ＋ V OUT1 IOUT ① ② (PhaseA) ー ＋ V OUT3 IOUT (PhaseB) ③ ④ OUT1→2 ① ② OUT1→2 OUT2→1 OUT3→4 ー ← Outwards OUT3→4 OUT4→3 Inwards → ③ ② Phase A – Phase B – Phase A – Phase B + Half-Step MODE The motor moves 45 degrees in an electric corner when I input 1Step Phase A – Phase B – Phase A + Phase B OFF ① ⑧ Phase A + Phase B + ② 45deg Phase A OFF Phase B + Phase A OFF Phase B – ⑦ ③ IOUT IOUT ⑥ Phase A – Phase B – ⑤ Phase A – Phase B OFF ④ Phase A – Phase B + 5. Thermal Shutdown circuit The thermal shutdown circuit in incorporated and the output is turned off when junction temperature Tj exceeds 140C and the abnormal state warning output is turned on. As the temperature falls by hysteresis, the output turned on again (automatic restoration). TSD = 140C (typ) TSD = 20C (typ) 8/12 LB1973JA Application Note Application Circuit Example 3. Example of applied circuit when connecting it in parallel (one latch valve application) Eva-Board Manual 1. Eva-Board circuit diagram Bill of Materials for LB1973JA Evaluation Board Footprint Manufacturer Manufacturer Part Number Substitution Allowed Lead Free SSOP16 (225mil) ON Semiconductor LB1973JA 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 9/12 LB1973JA Application Note 2-1. Eva-Board photograph (1)Two latch valve drive Connect OUT1 and OUT2, OUT3 and OUT4 to a Latch valve each. 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. Latch valve becomes the predetermined output state corresponding to the input state by inputting an input signal such as the following truth value table into IN1~IN4. Waveform of LB1973M evaluation board when driving Latch valve. 10/12 LB1973JA Application Note (2) One stepping motor drive 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 an 2 phase excitation, 1-2 phase excitation by inputting an input signal such as follows into IN1~IN4. Waveform of LB1973M evaluation board when driving stepping motor Full-Step Drive VCC=5V, 1000pps Half-Step Drive VCC=5V, 1600pps 11/12 LB1973JA 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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