TCA3727NKLA1

TCA3727NKLA1 Datasheet

TCA 3727

Part	Datasheet
TCA3727NKLA1	TCA3727NKLA1 (pdf)

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2-Phase Stepper-Motor Driver Bipolar IC TCA 3727 • 2 x amp. / 50 V outputs • Integrated driver, control logic and current control chopper • Fast free-wheeling diodes • Max. supply voltage 52 V • Outputs free of crossover current • Offset-phase turn-ON of output stages • Z-diode for logic supply • Low standby-current drain • Full, half, quarter, mini step TCA 3727 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 A per phase at operating voltages up to 50 V. P-DSO-24-1, -3 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. Type TCA 3727 TCA 3727 G Data Sheet Ordering Code Q67000-A8302 Q67000-A8335 Package P-DIP-20-6 P-DSO-24-3 TCA 3727 Ι 10 1 Ι 11 2 Phase 1 3 OSC 4 GND 5 GND 6 Q11 7 R1 8 VS 9 Q12 10 20 Ι 20 19 Ι 21 18 Phase 2 17 Inhibit 16 GND 15 GND 14 Q21 13 R2 12 VL 11 Q22 IEP00696 Figure 1 Pin Configuration TCA 3727 top view Data Sheet TCA 3727 Ι10 1 Ι11 2 Phase 1 3 OSC 4 GND 5 GND 6 GND 7 GND 8 Q11 9 R1 10 +VS 11 Q12 12 24 23 22 21 20 19 18 17 16 15 14 13 IEP00898 Ι 20 Ι21 Phase 2 Inhibit GND Q21 R2 +VL Q22 Figure 2 Pin Configuration TCA 3727 G top view Table 1 Pin Definitions and Functions Pin No. Function 1, 2, 19, 20 Digital control inputs IX0, IX1 for the magnitude of the current of the 1, 2, 23, 24 1 particular phase. See Table Input Phase 1 controls the current through phase winding On H-potential the phase current flows from Q11 to Q12, on L-potential in 5, 6, 15, 16 5, 6, 7, 8, 17, 18, 19, 20 1 Ground all pins are connected internally. 8 10 1 7, 10 9, 12 1 Oscillator works at approx. 25 kHz if this pin is wired to ground across nF. Resistor R1 for sensing the current in phase Push-pull outputs Q11, Q12 for phase 1 with integrated freewheeling diodes. Data Sheet TCA 3727 Table 1 Pin Definitions and Functions cont’d Pin No. 9 11 1 12 14 1 Function Supply voltage block to ground, as close as possible to the IC, with a stable electrolytic capacitor of at least 10 µF in parallel with a ceramic capacitor of 220 nF. Logic supply voltage either supply with 5 V or connect to +VS across a series resistor. A Z-diode of approx. 7 V is integrated. In both cases block to ground directly on the IC with a stable electrolytic capacitor of 10 µF in parallel with a ceramic capacitor of 100 nF. 11, 14 13, 16 1 13 15 1 17 21 1

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2-Phase Stepper-Motor Driver Bipolar IC

TCA 3727
• 2 x amp. / 50 V outputs
• Integrated driver, control logic and current control
chopper
• Fast free-wheeling diodes
• Max. supply voltage 52 V
• Outputs free of crossover current
• Offset-phase turn-ON of output stages
• Z-diode for logic supply
• Low standby-current drain
• Full, half, quarter, mini step

TCA 3727 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 A per phase at operating voltages up to 50 V.

P-DSO-24-1, -3

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.

Type TCA 3727 TCA 3727 G

Data Sheet
Ordering Code Q67000-A8302 Q67000-A8335

Package P-DIP-20-6 P-DSO-24-3

TCA 3727
Ι 10 1 Ι 11 2 Phase 1 3 OSC 4 GND 5 GND 6 Q11 7 R1 8 VS 9 Q12 10
20 Ι 20 19 Ι 21 18 Phase 2 17 Inhibit 16 GND 15 GND 14 Q21 13 R2 12 VL 11 Q22

IEP00696

Figure 1 Pin Configuration TCA 3727 top view

Data Sheet

TCA 3727
Ι10 1 Ι11 2 Phase 1 3 OSC 4 GND 5 GND 6 GND 7 GND 8 Q11 9 R1 10 +VS 11 Q12 12
24 23 22 21 20 19 18 17 16 15 14 13

IEP00898
Ι 20 Ι21 Phase 2 Inhibit GND Q21 R2 +VL Q22

Figure 2 Pin Configuration TCA 3727 G top view

Table 1

Pin Definitions and Functions

Pin No.

Function
1, 2, 19, 20

Digital control inputs IX0, IX1 for the magnitude of the current of the
1, 2, 23, 24 1 particular phase. See Table

Input Phase 1 controls the current through phase winding On

H-potential the phase current flows from Q11 to Q12, on L-potential in
5, 6, 15, 16
5, 6, 7, 8, 17, 18, 19, 20 1

Ground all pins are connected internally.
8 10 1 7, 10 9, 12 1

Oscillator works at approx. 25 kHz if this pin is wired to ground across nF.

Resistor R1 for sensing the current in phase

Push-pull outputs Q11, Q12 for phase 1 with integrated freewheeling diodes.

Data Sheet

TCA 3727

Table 1

Pin Definitions and Functions cont’d

Pin No. 9 11 1
12 14 1

Function

Supply voltage block to ground, as close as possible to the IC, with a stable electrolytic capacitor of at least 10 µF in parallel with a ceramic capacitor of 220 nF.

Logic supply voltage either supply with 5 V or connect to +VS
across a series resistor. A Z-diode of approx. 7 V is integrated. In both cases block to ground directly on the IC with a stable electrolytic capacitor of 10 µF in parallel with a ceramic capacitor of 100 nF.
11, 14 13, 16 1 13 15 1 17 21 1

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Datasheet ID: TCA3727NKLA1 638686