Document
AN44071A
37V/1.0A&1.7A Dual Microstepping Motor Driver
FEATURES
・Built-in thermal protection (TSD)
・2-channel stepping motor driver
If chip junction temperature rises and reaches to the
A signal driver controls 2 stepping motors ・Built-in decoder for micro steps (2-phase, half step,
setup temperature, all motor outputs are turned OFF. ・Built-in abnormal detection output function
1-2 phase, W1-2 phase and 2W1-2 phase excitation)
If OCP or TSD operates, an abnormal detection signal
Stepping motor can be driven by only external clock signal. is output. ・PWM can be driven by built-in CR (3-value can be selected・Built-in standby function
during PWM OFF period.)
The operation of standby function can lower current
The selection of PWM OFF period enables the best PWM consumption of this LSI.
drive.
・Built-in Home Position function
・Mix Decay control (4-value can be selected for Fast Decay Home Position function can detect the position of motor.
ratio)
・Built-in step detection output function
Mix Decay control can improve accuracy of motor current If step detection output function detects clock input
waveform. ・Built-in over-current protection (OCP)
If the current flows to motor output more than the setup
signal, it outputs a signal. ・Built-in 5 V power supply (accuracy : ±5%) ・56 pin Plastic Small Outline Package With Heat Sink
value due to ground-fault etc., the OCP operates and all
(SOP Type)
motor outputs are turned OFF. ・Built-in under voltage lockout (UVLO)
If supply voltage falls to less than the operating supply voltage range, the UVLO operates and all motor outputs are turned OFF.
APPLICATIONS
・LSI for stepping motor drives
DESCRIPTION
AN44071A is a quad channel H-bridge driver LSI. Two bipolar stepping motor can be controlled by a single driver LSI. Interface control is 1CLK_type, it can be selected 2-phase excitation, half- step, 1-2 phase excitation, W1-2 phase excitation and 2W1-2 phase excitation.
SIMPLIFIED APPLICATION
10 kΩ
ENABLEAB 40
DECAY1AB 23
DECAY2AB 34
STPHAB 20 CLKAB 39 DIRAB 38 ST1AB 35 ST2AB 36 ST3AB 37
VREFAB 21 PWMSWAB 22
16 BC1 17 BC2 0.01 μF 18 VPUMP 0.01 μF 29 AOUT2 31 RCSA 33 AOUT1
24 BOUT2 26 RCSB
TjmonABCD 10 0.1 μF S5VOUT 13
STBY 44
28 AOUT1 41 VM2
0.1 μF
NFAULT 11
10 kΩ
TEST 12
+ 43 VM1
47 μF
PWMSWCD 7 VREFCD 8
56 COUT2
CLKCD 46 DIRCD 47 ST1CD 50
54 RCSC 52 COUT1
ST2CD 49
ST3CD 48
5 DOUT2
STPHCD 9 10 kΩ ENABLECD 45
3 RCSD
DECAY1CD 6
1 DOUT1
DECAY2CD 51
14 GND
Notes)
This application circuit is an example. The operation of mass
production set is not guaranteed. You should perform enough
evaluation and verification on the design of mass production set.
You are fully responsible for the incorporation of the above
application circuit and information in the design of your equipment.
Mix Decay effect for Motor current
【Fig1:Slow Decay】
+OUT
-OUT
2ms/div
distortion
【Fig2:Mix Decay(25%)】
Motor Current +OUT
-OUT
Motor Current
2ms/div
distortionless
Condition: excitation mode :2W1-2 phase drive fig1 DECAY1=L DECAY2=L
fig2 DECAY1=L DECAY2=H
Publication date: November 2012
1
Ver. BEB
AN44071A
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Rating
Unit Note
Supply voltage (Pin 41, 43)
VM
Power dissipation
PD
Operating ambient temperature
Topr
Operating junction temperature
Tj
Storage temperature
Tstg
Output pin voltage (Pin 1, 5, 24, 28, 29, 33, 52, 56)
VOUT
Motor drive current 1 (Pin 24, 28, 29, 33)
IOUT1
Motor drive current 2 (Pin 1, 5, 52, 56)
IOUT2
Flywheel diode current 1(Pin 24, 28, 29, 33)
If1
Flywheel diode current 2 (Pin 1, 5, 52, 56)
If2
VRCSA,VRCSB,VRCSC,VRCSD;
VDECAY2CD,VDECAY2AB VDECAY1CD,VDECAY1AB
VPWMSWAB,VPWMSWCD
VVREFAB,VVREFCD
VSTPHAB,VSTPHCD
VNFAULT
VTEST
Input Voltage Range
VBC2 VVPUMP
VST1AB,VST2AB,VST3AB VST1CD,VST2CD,VST3CD
VDIRAB,VDIRCD
VCLKAB,VCLKCD
VENABLEAB,VENABLECD
VSTBY
ISTPHAB,ISTPHCD
INFAULT
IS5VOUT
ESD
HBM (Human Body Model) CDM (Charge Device Model)
37 448 –20 to +85 –20 to + 150 –55 to +150 37 ±1.0 ±1.7 ±1.0 ±1.7 2.5
-0.3 to 6
-0.3 to 6 -0.3 to 6 -0.3 to 6 -0.3 to 6 -0.3 to 6 (VM-1) to 43 (VM-2) to 43
-0.3 to 6
-0.3 to 6 -0.3 to 6 -0.3 to 6 -0.3 to 6
2 2 -7 to 0 ±2 ±1
V mW °C °C °C
V A A A A V
V
V V V V V V V
V
V V V V mA mA mA kV kV
*1 *2 *3 *3 *3 *4 *5 *5 *5 *5 —
—
— — *6 *6 — *7 *7
—
— — — — *6 *6 — — —
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 = 85°C for the independent (unmounted) LSI package without a heat sink.
When using this LSI, re.