AN44180A 37V / 1.5A Stepping Motor Driver FEATURES 4-phase input control Built-in standby function 2-phase, half step, 1-2 phase, W1-2 phase excitation enabled The operation of standby function can lower current PWM can be driven by built-in CR (3-value can be selected during consumption of this LSI. PWM OFF period.) Built-in 3.3 V power supply (accuracy : 3%) The selection of PWM OFF period enables the best PWM drive. Built-in EMI reduction function Built-in malfunction prevention function when it dont input Mix Decay control (4-value can be selected for Fast Decay ratio) supply voltage Mix Decay control can improve accuracy of motor current it prevents from malfunction and destruction when it input waveform. voltage to IF (ENABLEA/ENABLEB, IN0 3, PHA, PHB, Built-in over-current protection (OCP) STBY, VREFA, VREFB) and it dont supply voltage to VM. If the current flows to motor output more than the setup value 32 pin Plastic Small Outline Package (SOP Type) due to ground-fault etc., the OCP operates and all motor outputs are turned OFF APPLICATIONS Built-in under voltage lockout (UVLO) LSI for stepping motor drives If supply voltage falls to less than the operating supply voltage range, the UVLO operates and all motor outputs are turned OFF. DESCRIPTION Built-in thermal protection (TSD) AN44180A is a two channel H-bridge driver LSI. Bipolar If chip junction temperature rises and reaches to the setup stepping motor can be controlled by a single driver LSI. temperature, all motor outputs are turned OFF. Interface is parallel control IF and 2 phase excitation, half- Built-in abnormal detection output function (NFAULT) step, 1-2 phase excitation, W1-2 phase excitation can be If OCP or TSD operates, an abnormal detection signal is output. selected. TYPICAL APPLICATION Mix Decay effect for Motor current BC1 13 15 VPUMP 0.01 F Fig1:Slow Decay BC2 14 0.01 F 100k NFAULT 20 6 BOUT2 +OUT PHA 26 PHB 27 7 RCSB -OUT 0.22 IN0 28 8 BOUT1 IN1 29 IN2 30 0.1 F 16 VM2 Motor IN3 31 Current 47 F 2ms/div ENABLEA 17 + ENABLEB 18 1 VM1 distortion DECAY1 4 DECAY2 5 9AOUT2 Fig2:Mix Decay(25%) PWMSW 32 10 RCSA TJMON 3 +OUT 0.22 0.01F VREFA 21 11 AOUT1 -OUT VREFB 22 VREG 23 25 GND Motor 0.1 F STBY 19 Current TEST 24 2ms/div distortionless Notes : This application circuit is an example. The operation of the Condition: mass production set is not guaranteed. Customers shall excitation mode W1-2 phase drive perform enough evaluation and verification on the design of fig1 DECAY1=L DECAY2=L mass production set. Customers shall be fully responsible for the incorporation of the above application circuit and fig2 DECAY1=L DECAY2=H information in the design of the equipment. Ver. AEB Publication date: December 2012 1AN44180A ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Unit Note Supply voltage V 37 V *1 M Power dissipation P 0.347 W *2 D Operating ambient temperature T 20 +85 C *3 opr Operating junction temperature T 20 +150 C *3 j Storage temperature T 55 +150 C *3 stg Output pin voltage (AOUT1BOUT2) V 37 V *4 OUT Motor drive current (AOUT1BOUT2) I 1.5 A *5 OUT Flywheel diode current I 1.5 A *5 f (AOUT1BOUT2) V ,V 2.5 V RCSA RCSB V 43 V *6 VPUMP V 43 V *6 BC2 V V -0.3 to 6 V VREFA, VREFB V -0.3 to 6 V STBY V V -0.3 to 6 V Input Voltage Range PHA, PHB V V -0.3 to 6 V ENABLEA, ENABLEB V -0.3 to 6 V PWMSW V V -0.3 to 6 V DECAY1, DECAY2 V -0.3 to 6 V IN0~IN3 V -0.3 to 6 V TEST I -1 to 0 mA VREG Input Current Range I 0 to 2 mA *7 NFAULT HBM (Human Body Model) 2 kV ESD CDM (Charge Device Model) 1 kV Notes). This product may sustain permanent damage if subjected to conditions higher than the above stated absolute maximum rating. This rating is the maximum rating and device operating at this range is not guaranteeable as it is higher than our stated recommended operating range. When subjected under the absolute maximum rating for a long time, the reliability of the product may be affected. *1 :The values under the condition not exceeding the above absolute maximum ratings and the power dissipation. *2 :The power dissipation shown is the value at T = 85C for the independent (unmounted) LSI package without a heat sink. a When using this LSI, refer to the P -T diagram of the package standard and design the heat radiation with sufficient D a margin so that the allowable value might not be exceeded based on the conditions of power supply voltage, load, and ambient temperature. *3 :Except for the power dissipation, operating ambient temperature, operating junction temperature,and storage temperature, all ratings are for T = 25C. a *4 :This is output voltage rating and do not apply input voltage from outside to these pins. Set not to exceed allowable range at any time. *5 :Do not apply external currents to any pin specially mentioned. For circuit currents, (+) denotes current flowing into the LSI and () denotes current flowing out of the LSI. *6 :External voltage must not be applied to this pin. Do not exceed the rated value at any time. *7 :This pin is connected to open drain circuit inside. Connect a resistor in series with power supply. Do not exceed the rated value at any time. Ver. AEB 2