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TLE4726

Infineon Technologies AG
Part Number TLE4726
Manufacturer Infineon Technologies AG
Description 2-Phase Stepper-Motor Driver
Published Apr 16, 2005
Detailed Description 2-Phase Stepper-Motor Driver TLE 4726 Bipolar IC Overview Features • 2 × 0.75 A / 50 V outputs • Integrated driver, co...
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TLE4726
TLE4726

Overview
2-Phase Stepper-Motor Driver TLE 4726 Bipolar IC Overview Features • 2 × 0.
75 A / 50 V outputs • Integrated driver, control logic and current control (chopper) • Fast free-wheeling diodes • Low standby-current drain • Full, half, quarter, mini step P-DSO-24-3 Type TLE 4726 G Description Ordering Code Q67006-A9297 Package P-DSO-24-3 TLE 4726 is a bipolar, monolithic IC for driving bipolar stepper motors, DC motors and other inductive loads that operate on constant current.
The control logic and power output stages for two bipolar windings are integrated on a single chip which permits switched current control of motors with 0.
75 A per phase at operating voltages up to 50 V.
The direction and value of current are programmed for each phase via separate control inputs.
A common oscillator generates the timing for the current control and turn-on with phase offset of the two output stages.
The two output stages in a full-bridge configuration have integrated, fast free-wheeling diodes and are free of crossover current.
The logic is supplied either separately with 5 V or taken from the motor supply voltage by way of a series resistor and an integrated Z-diode.
The device can be driven directly by a microprocessor with the possibility of all modes from full step through half step to mini step.
Data Sheet 1 1999-09-15 TLE 4726 Ι10 Ι11 Phase 1 OSC GND GND GND GND Q11 R1 + VS Q12 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 IEP00898 Ι 20 Ι 21 Phase 2 Inhibit GND GND GND GND Q21 R2 +VL Q22 Figure 1 Pin Configuration (top view) Data Sheet 2 1999-09-15 TLE 4726 Pin Definitions and Functions Pin No.
1, 2, 23, 24 Function Digital control inputs IX0, IX1 for the magnitude of the current of the particular phase.
IX1 H H L L 3 IX0 H L H L Phase Current 0 1/3 Imax 2/3 Imax Example of Motor Status No current Hold Set Accelerate typical Imax with Rsense = 1 Ω: 750 mA Imax Input Phase 1; controls the current through phase winding 1.
On H-potential t...


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