AN44183A 37V / 4.0A Microstepping Motor Driver FEATURES Built-in standby function Built-in decoder for micro steps The operation of standby function can lower current consumption of this LSI. (2-phase, half step, 1-2 phase, W1-2 phase ,2W1-2 phase, Built-in reset function and 4W1-2 phase excitation ) Motor current state is initialized by the operation of a Stepping motor can be driven by only external clock signal reset function. Interface: Clock (Rising edge detection and both edge detection) Built-in 3.3 V power supply (accuracy : 3%) PWM can be driven by built-in CR (2-value can be selected Built-in EMI reduction function during PWM OFF period.) Built-in malfunction prevention function when it dont input The selection of PWM OFF period enables the best PWM drive. supply voltage Mix Decay control (4-value can be selected for Fast Decay ratio) it prevents from malfunction and destruction when it input Mix Decay control can improve accuracy of motor current voltage to IF(ENABLE, RESET, ST1 ST3, DIR, CLK1, waveform. CLK2, STBY, VREFA,VREFB) Built-in over-current protection (OCP) Built-in Home Position function If the current flows to motor output more than the setup value Home Position function can detect the position of motor. due to ground-fault etc., the OCP operates and all motor outputs 56 pin Plastic Small Outline Package With Heat Sink are turned OFF. (SOP Type) Built-in under voltage lockout (UVLO) If supply voltage falls to less than the operating supply voltage APPLICATIONS range, the UVLO operates and all motor outputs are turned OFF. LSI for stepping motor drives Built-in thermal protection (TSD) DESCRIPTION If chip junction temperature rises and reaches to the setup AN44183A is a two channel H-bridge driver LSI. Bipolar temperature, all motor outputs are turned OFF. stepping motor can be controlled by a single driver LSI. Built-in abnormal detection output function (NFAULT) Interface control is 1CLK type, 2 phase excitation, half- step, If OCP or TSD operates, an abnormal detection signal is 1-2 phase excitation, W1-2 phase excitation ,2W1-2 phase output. excitation 4W1-2 phase excitation can be selected. TYPICAL APPLICATION Mix Decay effect for Motor current BC1 12 Fig1:Slow Decay 0.01 F BC2 13 100k 14 VPUMP NFAULT 21 +OUT 0.01 F CLK1 29 CLK2 30 46,47 BOUT2 DIR 37 55,56 RCSB ST1 33 Motor 0.165 ST2 32 48,49 BOUT1 Current ST3 31 (1A/div) 0.1 F 41 VM2 ENABLE 18 RESET 19 47 F 5ms/div DECAY1 44 + distortion DECAY2 45 16 VM1 Fig2:Mix Decay(25%) PWMSW 38 8,9 AOUT2 TJMON 43 +OUT 1,2 RCSA 100k 0.165 10,11 AOUT1 0.01F VREFA 22 VREFB 23 Motor 26 GND Current VREG 24 (1A/div) 0.1F STBY 20 5ms/div TEST 25 distortionless Notes) Condition: This application circuit is an example. The operation of mass production set is not guaranteed. You should perform enough excitation mode 4W1-2 phase drive evaluation and verification on the design of mass production set. fig1 DECAY1=L DECAY2=L You are fully responsible for the incorporation of the above fig2 DECAY1=L DECAY2=H application circuit and information in the design of your equipment. Ver. AEB Publication date: December 2012 1AN44183A ABSOLUTE MAXIMUM RATINGS Parameter Symbol Rating Unit Note Supply voltage V 37 V *1 M Power dissipation P 0.448 W *2 D Operating ambient T 20 +85 C *3 opr temperature Operating junction T 20 +150 C *3 j temperature Storage temperature T 55 +150 C *3 stg Output pin voltage V 37 V *4 OUT (AOUT1BOUT2) Motor drive current I 4.0 A *5 OUT (AOUT1BOUT2) Flywheel diode current I 4.0 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 CLK1, CLK2 V -0.3 to 6 V Input Voltage Range ENABLE V -0.3 to 6 V RESET V -0.3 to 6 V PWMSW V V -0.3 to 6 V DECAY1, DECAY2 V -0.3 to 6 V ST1~ST3 V -0.3 to 6 V DIR V -0.3 to 6 V TEST I -1 to 0 mA VREG Input Current Range I 0 to 2 mA *7 NFAULT I 0 to 1 mA *7,*8 TJMON 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 Ta = 85C for the independent (unmounted) LSI package without a heat sink. When using this LSI, refer to the PD-Ta diagram of the package standard and design the heat radiation with sufficient margin so that the allowable value might not be exceeded based on the conditions of power supply voltage, load, and ambient temperature. Ver. AEB 2