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AN44071A-VF

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P35
AN44071A
28
Ver. BEB
APPLICATIONS INFORMATION ( continued )
1.Notes (continued)
CLKAB
IAOUT
Example) 1-2 phase excitation
ENABLEAB
IAOUT
ENABLEAB
CLKAB
7 8 1 2
1 2 3 4 5 6
3 4 5 6 7 8
1 2 3 4 5 6
6 7 8 1 2
High
High
High
High
Low
Low
Motor stop
Motor stop
8) CLK input at ENABLE = Low
As the below figure (Ex. 1-2 phase excitation), when inputting CLKAB at the time of motor stop and ENABLEAB =
Low (all motor outputs OFF → Motor current = 0 A), the setup value of motor current will proceed at CLKAB input.
Therefore, in case of restart at ENABLEAB = High, take notice that the position of restart is where the current state
just before motor stop gains CLKAB input. For IBOUT, ICOUT and IDOUT, the operation is same as the below.
In spite of stop at state[6] , because CLKAB is input at ENABLEAB = Low,
the motor will restart after ENABLEAB = High at state [3].
In spite of stop at state [6] , because CLKAB is not input at ENABLEAB = Low,
the motor will restart after ENABLE AB= High at state [6] just before stop.
AN44071A
29
Ver. BEB
APPLICATIONS INFORMATION ( continued )
1. Notes (continued)
Motor
Connecter GND
GND
RCSA/RCSB/RCSC/RCSD
LSI
Motor current
detection resistor
Point 1
Point 2
Point 3
(A)
Figure 1. No recommended pattern
VM
GND
L
C
RCS
VM
GND
Figure 2. Recommended pattern
VM
GND
L
C
RCS
VM
GND
Low spike amplitude
due to capacitance
between VM pin
and GND
LSI
LSI
9) Notes on RCS line
Take consideration in the below figure and the points and design PCB pattern.
(1) Point 1
Design so that the wiring to the current detection pin (RCSA/RCSB/RCSC/RCSD pin) of this LSI is thick
and short to lower impedance. This is why current can not be detected correctly owing to wiring
impedance and current might not be supplied to a motor sufficiently.
(2) Point 2
Design so that the wiring between current detection resister and connecter GND (the below figure
Point 2) is thick and short to lower impedance. As the same as Point 1, sufficient current might not be
supplied due to wiring impedance. In addition, if there is a common impedance on the side of GND of
RCSA/RCSB/RCSC/RCSD, peak detection might be erroneous detection. Therefore, install the wiring
on the side of GND of RCSA/RCSB/RCSC/RCSD independently.
(3) Point 3
Connect GND pin of this LSI to the connecter on PCB independently. Separate the wiring removed current
detection resister of large current line (Point 2) from GND wiring and make these wirings one-point
shorted at the connecter as the below figure. That can make fluctuation of GND minimum.
10) A high current flows into the LSI. Therefore, the common impedance of PCB can not be ignored. Take the following
points into consideration and design the PCB pattern for a motor. Because the wiring connecting to VM1 (Pin 43)
and VM2 (Pin 41)of this LSI is high-current, it is easy to generate noise at time of switching by wiring L. That might
cause malfunction and destruction (Figure 1). As Figure 2, the escape way of the noise is secured by connecting
a capacitor to the connector close to the VM pin of the LSI. This makes it possible to suppress the fluctuation of
direct VM pin voltage of the LSI. Make the setting as shown in Figure 2 as much as possible.
AN44071A
30
Ver. BEB
APPLICATIONS INFORMATION ( continued )
1. Notes (continued)
Temp[°C]
VBE[V]
ΔVBE / Δtemp = –1.87 [mV / °C]
150
0
TjmonABCD pin temperature characteristics
12) Power-on and Supply voltage change
When supplying to VM pin (Pin 41, 43) or raising supply voltage, set the rise speed of VM voltage to less than 0.1
V/µs . If the rise speed of supply voltage is too rapid, it might cause error of operation and destruction of the LSI.
If the rise speed of VM voltage is more rapid than 0.1V/µs, conduct a sufficient reliability test and also check a
sufficient evaluation for a product.
In addition, rise the VM supply voltage in an ENABLE = Low state when change VM supply voltage from low
voltage to high voltage within the operating supply voltage range.
Since there is not the all motor outputs OFF period shown in 1. Notes No.5 for the supply voltage change within the
operating supply voltage range, the VPUMP voltage is in a low voltage state due to not following
to VM supply voltage change enough, and this LSI might not operate normally.
Therefore, restart this LSI by setting ENABLE to High after the VPUMP voltage rises enough.
In addition, it is recommended to fall VM voltage in motor stop state (ENABLEAB/CD = Low or STBY = Low) for
the stable fall of supply voltage.
Supply voltage
VM
Time
Rise at less than 0.1 V/µs
13) Pins to set mode
・As for the High/Low setting of DECAY1AB, DECAY2AB, DECAY1CD, DECAY2CD, PWMSWAB and PWMSWCD,
it is recommended to short to GND or S5VOUT. If the above pins are high-impedance such as open, note that this
LSI might not operate normally because it easily influences the noise
・PWMSWAB/CD can be set to Middle by setting PWMSWAB/CD to Open. However, it might occur the error of
operation due to the noise. In case, connect the capacity of 0.01 µF or more between PWMSWAB/CD and GND .
11) LSI junction temperature
In case of measuring chip temperature of this LSI, measure the voltage of TjmonABCD pin (Pin 10) and estimate
the chip temperature from the data below. However, because this data is technical reference data, conduct a
sufficient reliability test of the LSI and evaluate the product with the LSI incorporated.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P33P34-P35

AN44071A-VF

Mfr. #:
Buy AN44071A-VF
Manufacturer:
Panasonic
Description:
Motor / Motion / Ignition Controllers & Drivers Stepping Motor Drivr HSOP056-P-0300B
Lifecycle:
New from this manufacturer.
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