L6470PD STMicroelectronics, L6470PD Datasheet - Page 35

• 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
7.2
7.3
Sensorless stall detection
Depending on motor speed and load angle characteristics, the 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
Low speed optimization
When the 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
The L6470 implements a low speed optimization in order to remove this effect.
Figure 15. Current distortion and compensation
The optimization can be enabled setting high the LSPD_OPT bit in the MIN_SPEED register
(see
speed optimization is enabled, speed profile minimum speed is forced to zero.
Section
9.1.8) and is active in a speed range from zero to MIN_SPEED. When low
Figure
15).
Doc ID16737 Rev 5
Section
Phase current control
9.2.20).
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