L6470HTR STMicroelectronics, L6470HTR Datasheet - Page 31

• Manufacturer Part Number: L6470HTR
• Description: IC STEPPER/DC MOTOR DVR 28HTSSOP
• Manufacturer: STMicroelectronics

Specifications of L6470HTR

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10812-2

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
).
31/64