L6460 STMicroelectronics, L6460 Datasheet - Page 66

• Manufacturer Part Number: L6460
• Description: MOSFET & Power Driver ICs SPI Config Stepper DC Multi Motor DRV
• Manufacturer: STMicroelectronics
• Type: Full-Bridge Driverr

Specifications of L6460

• Product: Half-Bridge Drivers
• Rise Time: 0.4 us
• Fall Time: 0.4 us
• Supply Voltage (max): 38 V
• Supply Voltage (min): 13 V
• Supply Current: 11 mA
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Number Of Drivers: 4
• Output Current: 10 mA
• Output Voltage: 30 V
• Package / Case: TQFP-64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Power bridges
Note:
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Table 21.
The allowable control modes are as follows:
1.
2.
3.
4.
Table 22.
When in 1/16 step mode, the best phase approximation of sinusoidal wave, is obtained by
repeating the “F” step as follows: 0, 1, 2, 3, … , D, E, F, F, F, E, D, … , 3, 2, 1, 0
When internal stepping sequence generation is used, the stepping direction is set by the
StepDir bit according to the
StepCtrlMode[2:0]
Stepping sequence left to external microcontroller: in this mode the current level in
each motor winding is set by the microcontroller via the serial interface.
Full step: in this mode the electrical angle will change by 90° steps at each StepReq
signal transition. There are two possibilities:
–
–
Half step: in this mode, one motor winding is energized and then two windings
alternately so the electrical angles the motor will do when rotating in clockwise direction
and using the same current limit in both the phases are: 45°, 90°, 135°, 180°, 225°,
270°, 315° and 360°.
Microstepping: in this mode the current in each motor winding has a quasi sinusoidal
profile. The increment between each step is obtained at each transition of StepCmd bit
in StepCmd register. The difference between each step could be chosen (4, 8 or 16
levels for each phase) according to following table:
000 or 111
StepFromGpio
Normal step (two phases on): in normal step mode both windings are energized
simultaneously and the current will be alternately reversed. The resulting electrical
angles will be 45°, 135°, 225° and 315°.
Wave drive (one phase on): In wave drive mode each winding is alternately
energized and reversed. The resulting electrical angles will be 90°, 180° and 270°
and 360°.
001
010
011
100
101
110
Sequencer driver
Stepper driving mode
0
1
Control mode
Table
Normal Step
Wave Drive
No Control
1/16 Step
Half Step
1/4 Step
1/8 Step
Doc ID 17713 Rev 1
23.
Stepping sequence control left to the external
controller
Half step
Full step (two phases on)
Full step (one phase on)
Four micro steps
Eight micro steps
Sixteen micro steps
StepCmd bit in StepCmd register.
Sequencer driver
GPIO12 input pin.
Description
L6460