PCA9629PW,118 NXP Semiconductors, PCA9629PW,118 Datasheet - Page 31

• Manufacturer Part Number: PCA9629PW,118
• Description: Motor / Motion / Ignition Controllers & Drivers I2C-bus Stepper motor controller
• Manufacturer: NXP Semiconductors
• Type: Stepper Motor Controllerr

Specifications of PCA9629PW,118

• Rohs: yes
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 4.5 V to 5.5 V
• Supply Current: 6 mA
• Mounting Style: SMD/SMT
• Package / Case: TSSOP-16
• Factory Pack Quantity: 2500

NXP Semiconductors
PCA9629
Product data sheet
7.9.1 One-phase drive (wave drive)
7.9 Phase sequence generator
The PCA9629 phase sequence generator uses the on-chip oscillator and control logic to
generate logic waveforms needed to support the following three types of stepper motor
drive formats:
These logic level outputs are used to drive high current power driver stages to provide
required drive current to the stepper motor coils.
In one-phase drive method, only one winding is energized at any given time. The
advantage of wave drive mode is its simplicity. The disadvantage of wave drive mode is
that in the unipolar wound motor only 25 %, and in the bipolar motor only 50 % of the total
motor winding are used at any given time. This means that maximum torque output from
the motor is not made available. Since only one winding is energized, holding torque and
working torque are reduced by 30 %. This can, within limits, be compensated by
increasing supply voltage. The advantage of this form of drive is higher efficiency, but at
the cost of reduced step accuracy.
Table 38.
Winding
Winding D
Winding C
Winding B
Winding A
Fig 11. Wave drive step sequence waveforms
•
•
•
One-phase drive, also called ‘wave drive’
Two-phase drive
Half-step drive
A
B
C
D
Number of steps shown = 4 for simplicity.
rotor position
step pulses
Logic output sequence for wave drive
output C
output D
output B
output A
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 29 February 2012
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1
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2
C-bus stepper motor controller
5
1
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6
0
1
0
0
PCA9629
© NXP B.V. 2012. All rights reserved.
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