L6228QTR STMicroelectronics, L6228QTR Datasheet - Page 17

• Manufacturer Part Number: L6228QTR
• Description: IC DVR BIPO STEP MOTOR 32-VFQFPN
• Manufacturer: STMicroelectronics
• Type: Bipolar Stepper Motor Driverr

Specifications of L6228QTR

• Applications: Stepper Motor Driver
• Number Of Outputs: 1
• Current - Output: 1.4A
• Voltage - Supply: 8 V ~ 52 V
• Operating Temperature: -25°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VFQFN, 32-VFQFPN
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 48 V
• For Use With: 497-6818 - EVAL BOARD FOR L6228Q
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-6864-2; L6228QTR

L6228Q
4.5
4.6
Figure 16. Fast decay mode output stage configurations
Figure 17. Slow decay mode output stage configurations
Stepping sequence generation
The phase sequence generator is a state machine that provides the phase and enable
inputs for the two bridges to drive a stepper motor in either full step or half step. Two full step
modes are possible, the normal drive mode where both phases are energized each step
and the wave drive mode where only one phase is energized at a time. The drive mode is
selected by the HALF/FULL input and the current state of the sequence generator as
described below. A rising edge of the CLOCK input advances the state machine to the next
state. The direction of rotation is set by the CW/CCW input. The RESET input resets the
state machine to state 1.
Half step mode
A HIGH logic level on the HALF/FULL input selects half step mode.
motor current waveforms and the state diagram for the phase sequencer generator.
At start-up or after a RESET the phase sequencer is at state 1. After each clock pulse the
state changes following the sequence 1,2,3,4,5,6,7,8,… if CW/CCW is high (clockwise
movement) or 1,8,7,6,5,4,3,2,… if CW/CCW is low (counterclockwise movement).
A) ON TIME
A) ON TIME
D01IN1335
D01IN1336
B) 1μs DEAD TIME
B) 1μs DEAD TIME
Doc ID 14321 Rev 4
C) QUASI-SYNCHRONOUS
C) SYNCHRONOUS
RECTIFICATION
RECTIFICATION
Figure 18
D) 1μs SLOW DECAY
D) 1μs DEAD TIME
Circuit description
shows the
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