L6470H STMicroelectronics, L6470H Datasheet - Page 31

• Manufacturer Part Number: L6470H
• Description: Motor / Motion / Ignition Controllers & Drivers 8 - 45V 7.0A 1/128 Microstepping SPI
• Manufacturer: STMicroelectronics
• Type: Micro Stepping Motor Driverr
• Series: -r

Specifications of L6470H

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 8 V to 45 V
• Supply Current: 0.5 mA
• Mounting Style: SMD/SMT
• Package / Case: HTSSOP-28
• Operating Temperature: - 40 C to + 125 C
• Applications: Stepper Motor Driver, 2 Phase
• Evaluation Tools: *
• Number Of Outputs: 1
• Current - Output: 3A
• Voltage - Load: 8 V ~ 45 V
• Voltage - Supply: 3.3V, 5V
• Mounting Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L6470
7.2
7.3
Sensorless stall detection
Depending on motor speed and load angle characteristics, L6470 offers a motor stall
condition detection using a programmable current comparator.
When a stall event occurs, the respective flag (STEP_LOSS_A or STEP_LOSS_B) is forced
low until a GetStaus command or a system reset occurs (see paragraph
Low speed optimization
When motor is driven at a very low speed using a small driving voltage, the resulting phase
current can be distorted. As a consequence, the motor position is different from the ideal
one (see
L6470 implements a low speed optimization in order to remove this effect.
Figure 13. Current distortion and compensation
The optimization can be enabled setting high the LSPD_OPT bit in MIN_SPEED register
(see paragraph
speed optimization is enabled, speed profile minimum speed is forced to zero.
Figure 13
9.1.8
).
) and is active into speed range from zero to MIN_SPEED. When low
Doc ID 16737 Rev 2
Phase current control
9.2.20
).
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