L6470PD STMicroelectronics, L6470PD Datasheet - Page 43

• Manufacturer Part Number: L6470PD
• Description: Motor / Motion / Ignition Controllers & Drivers dSPIN 7.0A 8 - 45 V DMOS Motor Driver
• Manufacturer: STMicroelectronics
• Type: 2 Phase Stepper Motor Driverr

Specifications of L6470PD

• Rohs: yes
• Product: Stepper Motor Controllers / Drivers
• Operating Temperature: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: POWERSO-36
• Number Of Outputs: 4
• Output Current: 3 A
• Output Voltage: 3.2 V
• Power Dissipation: 5 W

L6470
9.1.7
9.1.8
9.1.9
where DEC is the integer number stored in the register and tick is 250 ns.
The available range is from 14.55 to 59590 step/s2 with a resolution of 14.55 step/s2.
When the device is working in infinite acceleration mode, this value is ignored.
Any attempt to write the register when the motor is running causes the command to be
ignored and the NOTPERF_CMD flag to rise (see
MAX_SPEED
The MAX_SPEED register contains the speed profile maximum speed expressed in
step/tick (format unsigned fixed point 0.18).
In order to convert it in step/s, the following formula can be used:
Equation 7
where MAX_SPEED is the integer number stored in the register and tick is 250 ns.
The available range is from 15.25 to 15610 step/s with a resolution of 15.25 step/s.
MIN_SPEED
The MIN_SPEED register contains the following parameters:
Table 11.
The MIN_SPEED parameter contains the speed profile minimum speed. Its value is
expressed in step/tick and to convert it in step/s, the following formula can be used:
Equation 8
where MIN_SPEED is the integer number stored in the register and tick is the ramp 250 ns.
The available range is from 0 to 976.3 step/s with a resolution of 0.238 step/s.
When the LSPD_OPT bit is set high, the low speed optimization feature is enabled and the
MIN_SPEED value indicates the speed threshold below which the compensation works. In
this case the minimum speed of the speed profile is set to zero.
An attempt to write the register when the motor is running causes the NOTPERF_CMD flag
to rise.
FS_SPD
The FS_SPD register contains the threshold speed. When the actual speed exceeds this
value, the step mode is automatically switched to full-step two-phase on. Its value is
LSPD_OPT
Bit 12
MIN_SPEED register
Bit 11 Bit 10 Bit 9 Bit 8 Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
[
[
Doc ID16737 Rev 5
step/s
step/s
]
]
=
=
MAX_SPEED
------------------------------------------------------- -
MIN_SPEED
----------------------------------------------------- -
MIN_SPEED
tick
tick
Section
⋅
⋅
2
2
–
–
24
18
9.1.22).
Programming manual
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