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Type Ordering Code Package

TCA 3727 Q67000-A8302 P-DIP-20-6

TCA 3727 G Q67000-A8335 P-DSO-24-3

2-Phase Stepper-Motor Driver

Bipolar IC

TCA 3727

P-DSO-24-1, -3

Data Sheet 1 Rev. 2.0, 2004-10-01

Features

•2 × 0.75 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

Description

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 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.

Summary of content (29 pages)

PAGE 1
TCA 3727 2-Phase Stepper-Motor Driver Bipolar IC Features • • • • • • • • • 2 × 0.75 amp. / 50 V outputs Integrated driver, control logic and current control (chopper) Fast free-wheeling diodes Max.
PAGE 2
TCA 3727 Ι 10 1 20 Ι 20 Ι 11 2 19 Ι 21 Phase 1 3 18 Phase 2 OSC 4 17 Inhibit GND 5 16 GND GND 6 15 GND Q11 7 14 Q21 R1 8 13 R2 VS 9 12 VL Q12 10 11 Q22 IEP00696 Figure 1 Data Sheet Pin Configuration TCA 3727 (top view) 2 Rev. 2.
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TCA 3727 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 Ι 20 Ι 21 Phase 2 Inhibit GND GND GND GND Q21 R2 +VL Q22 IEP00898 Figure 2 Pin Configuration TCA 3727 G (top view) Table 1 Pin Definitions and Functions Pin No. Function 1, 2, 19, 20 (1, 2, 23, 24)1) Digital control inputs IX0, IX1 for the magnitude of the current of the particular phase. See Table 2. 3 Input Phase 1; controls the current through phase winding 1.
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TCA 3727 Table 1 Pin Definitions and Functions (cont’d) Pin No. Function 9 (11)1) 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. 12 (14)1) 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.
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TCA 3727 + VL 12 4 + VS 9 OSC Q11 7 Ι10 1 Ι11 2 Phase 1 3 Inhibit 17 Phase 1 Q12 10 Function Logic Phase 1 8 R1 Inhibit Q21 14 Ι 20 20 Ι 21 19 Phase 2 18 Phase 2 11 Function Logic Phase 2 13 5, 6, 15, 16 GND Figure 3 Data Sheet Q22 R2 IEB00697 Block Diagram TCA 3727 5 Rev. 2.
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TCA 3727 +VL 14 4 + VS 11 Oscillator D11 D12 T11 Ι10 T12 Ι11 2 Phase 1 3 Inhibit 21 Phase 1 Functional Logic Phase 1 D14 T13 T14 Q12 R1 Inhibit D21 D22 T22 16 Q21 24 Phase 2 D23 Ι21 23 Phase 2 22 Functional Logic Phase 2 T23 D24 T24 13 15 5-8, 17-19 GND Data Sheet 12 10 T21 Figure 4 Q11 1 D13 Ι20 9 Q22 R2 IEB00899 Block Diagram TCA 3727 G 6 Rev. 2.
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TCA 3727 Table 3 Absolute Maximum Ratings TA = -40 to 125 °C Parameter Supply voltage Logic supply voltage Z-current of VL Output current Ground current Logic inputs Symbol VS VL IL IQ IGND VIXX R1, R2, oscillator input voltage VRX, VOSC Junction temperature Tj Storage temperature Tstg Limit Values Unit Remarks Min. Max. 0 52 V – 0 6.5 V Z-diode – 50 mA – -1 1 A – -2 2 A – -6 VL + 0.3 V IXX; Phase 1, 2; Inhibit -0.3 VL + 0.3 V – – – 125 150 °C °C – max.
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TCA 3727 Table 4 Operating Range Parameter Symbol Limit Values Unit Remarks Min. Max. 5 50 V – Logic supply voltage VS VL 4.5 6.
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TCA 3727 Table 5 Characteristics VS = 40 V; VL = 5 V; -25 °C ≤ Tj ≤ 125 °C Parameter Symbol Limit Values Unit Test Condition Min. Typ. Max. IS IS – 0.2 0.5 mA – 16 20 mA IL IL – 1.7 3 mA – 18 25 mA IOSC VOSCL Charging threshold Discharging threshold VOSCH Frequency fOSC Phase Current Selection (R1; R2) – 110 – µA – – 1.3 – V – – 2.3 – V – 18 25 35 kHz COSC = 2.
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TCA 3727 Table 5 Characteristics (cont’d) VS = 40 V; VL = 5 V; -25 °C ≤ Tj ≤ 125 °C Parameter Symbol Limit Values Min. Typ. Max. 6.5 7.4 8.2 Unit Test Condition Internal Z-Diode Z-voltage VLZ V IL = 50 mA Power Outputs Diode Transistor Sink Pair (D13, T13; D14, T14; D23, T23; D24, T24) Saturation voltage Saturation voltage Reverse current Forward voltage Forward voltage Vsatl Vsatl IRl VFl VFl – 0.3 0.6 V – 0.5 1 V – – 300 µA – 0.9 1.3 V – 1 1.4 V IQ = -0.5 A IQ = -0.
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TCA 3727 Quiescent Current IS, IL versus Supply Voltage VS Quiescent Current IS, IL versus Junction Temperature Tj IED01655 40 IED01656 40 mA mA Ι S, Ι L Ι S, Ι L T j = 25 C 30 V S = 40V 30 Ι XX = L ΙL 20 Ι XX = H ΙL 20 ΙL Ι XX = L ΙL 10 10 Ι XX = H ΙS ΙS 0 0 10 20 30 V VS 0 50 Output Current IQX versus Junction Temperature Tj Ι QX 0 25 50 75 100 C 150 Tj Operating Condition: • • • • • • • IED01657 800 -25 mA 600 VL = 5 V VInh = H COSC = 2.
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TCA 3727 Output Saturation Voltages Vsat versus Output Current IQ Forward Current IF of Free-Wheeling Diodes versus Forward Voltages VF ΙF IED01167 1.0 A V Fl V Fu 0.8 T j = 25 C 0.6 0.4 0.2 0 0 0.5 1.0 V 1.5 VF Typical Power Dissipation Ptot versus Output Current IQ (non stepping) Permissible Power Dissipation Ptot versus Case Temperature TC IED01660 12 Measured at pin 5. W Ptot 10 P-DSO-24 8 6 P-DIP-20 4 2 0 -25 Data Sheet 12 0 25 50 75 100 125 C 175 Tc Rev. 2.
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TCA 3727 Input Current of Inhibit versus Junction Temperature Tj Input Characteristics of IXX, Phase X, Inhibit IED01661 0.8 mA Ι IXX 0.6 V L = 5V 0.4 0.2 0 0.2 0.4 0.6 0.8 -6 -5 -2 3.9 2 V 6 V IXX Oscillator Frequency fOSC versus Junction Temperature Tj 30 kHz f OSC IED01663 V S = 40V V L = 5V COSZ = 2.2nF 25 20 15 -25 0 Data Sheet 25 50 75 100 125 C 150 Tj 13 Rev. 2.
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TCA 3727 100 µF Ι ΙL Ι ΙH 220 nF 1 Ι10 2 Ι11 3 17 12 9 VL Inhibit Ι 20 19 Ι 21 VΙ L VΙ H ΙS Phase 2 OSC 4 Ι OSC VOSC 2.2 nF 100 µF 220 nF VS VS Q11 Phase 1 20 18 ΙL Q12 TCA 3727 Q21 Q22 13 8 R2 1Ω VSense R1 1Ω 7 10 14 11 ΙQ - Ι Fu -ΙR Ι Ru VSatl - VFl GND 5, 6 15, 16 Ι GND VSatu - VFu VSense IES00706 Figure 5 Data Sheet Test Circuit 14 Rev. 2.
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TCA 3727 +5 V +40 V 100 µF 12 1 2 3 Micro Controller 17 20 19 18 Ι10 3 VS VL Phase 1 Inhibit Q12 10 TCA 3727 Q21 Ι 20 Ι 21 Phase 2 OSC 4 7 Q11 Ι11 2.2 nF 100 µF 220 nF 220 nF Q22 13 R2 1Ω 8 R1 1Ω 14 11 M GND 5, 6 15, 16 IES00707 Figure 6 Data Sheet Application Circuit 15 Rev. 2.
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TCA 3727 Normal Mode Accelerate Mode H Ι 10 L t H Ι 11 L t H Phase 1 L t i acc i set Ι Q1 t i set i acc i acc i set Ι Q2 t i set i acc Phase 2 Ι 20 Ι 21 t H L t H L t H L IED01666 Figure 7 Data Sheet Full-Step Operation 16 Rev. 2.
PAGE 17
TCA 3727 Normal Mode Accelerate Mode Ι 10 H L Ι 11 H L t t H L Phase 1 t i acc i set Ι Q1 t - i set - i acc i acc i set Ι Q2 t - i set - i acc Phase 2 H L Ι 20 H L Ι 21 t t H L t IED01667 Figure 8 Data Sheet Half-Step Operation 17 Rev. 2.
PAGE 18
TCA 3727 Figure 9 Data Sheet Quarter-Step Operation 18 Rev. 2.
PAGE 19
TCA 3727 Ι 10 H Ι 11 H L t L t H Phase 1 L t i acc i set i hold Ι Q1 t i hold i set i acc i acc i set i hold Ι Q2 t i hold i set i acc Phase 2 Ι 20 Ι 21 H L t H L t H L t IED01665 Figure 10 Data Sheet Mini-Step Operation 19 Rev. 2.
PAGE 20
TCA 3727 V Osc 2.4 V 1.4 V 0 T t Ι GND 0 t V Q12 + VS V FU V sat 1 0 t V Q11 V satu D + VS V satu C t V Q22 + VS 0 t V Q21 + VS t Operating conditions: VS VL L phase x R phase x V phase x V Inhibit V xx Figure 11 Data Sheet = 40 V =5V = 10 mH = 20 Ω =H =H =L IED01177 Current Control 20 Rev. 2.
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TCA 3727 Inhibit L V Osc t 2.3 V 1.3 V 0 Oscillator High Imped. Oscillator High Imped.
PAGE 22
TCA 3727 Calculation of Power Dissipation The total power dissipation Ptot is made up of • • • saturation losses Psat (transistor saturation voltage and diode forward voltages), quiescent losses Pq (quiescent current times supply voltage) and switching losses Ps (turn-ON / turn-OFF operations). The following equations give the power dissipation for chopper operation without phase reversal. This is the worst case, because full current flows for the entire time and switching losses occur in addition.
PAGE 23
TCA 3727 +V S Dx1 Tx1 Dx2 Tx2 L Dx3 Tx3 Dx4 Tx4 V sense R sense IES01179 Figure 13 Voltage and Current at Chopper Transistor Turn-ON Turn-OFF iR ΙN iD VS + VFu VS + VFu Vsatl t D ON t D OFF t ON tp t OFF t IET01210 Figure 14 Data Sheet 23 Rev. 2.
PAGE 24
TCA 3727 Application Hints The TCA 3727 is intended to drive both phases of a stepper motor. Special care has been taken to provide high efficiency, robustness and to minimize external components. Power Supply The TCA 3727 will work with supply voltages ranging from 5 V to 50 V at pin VS. As the circuit operates with chopper regulation of the current, interference generation problems can arise in some applications. Therefore the power supply should be decoupled by a 0.
PAGE 25
TCA 3727 Thermal Shut Down To protect the circuit against thermal destruction, thermal shut down has been implemented. To provide a warning in critical applications, the current of the sensing element is wired to input Inhibit. Before thermal shut down occurs Inhibit will start to pull down by some hundred microamperes. This current can be sensed to build a temperature prealarm. Data Sheet 25 Rev. 2.
PAGE 26
TCA 3727 Package Outlines GPD05587 Figure 15 P-DIP-20-6 (Plastic Dual In-line Package) You can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”: http://www.infineon.com/products. Data Sheet 26 Dimensions in mm Rev. 2.
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1.27 +0.0 9 7.6 -0.2 1) 8˚ MAX. 0.35 x 45˚ 0.23 2.65 MAX. 2.45 -0.2 0.2 -0.1 TCA 3727 0.4 +0.8 0.1 0.35 +0.15 2) 0.2 24x 24 1 10.3 ±0.3 13 15.6 -0.4 1) 12 Index Marking 1) 2) Does not include plastic or metal protrusion of 0.15 max. per side Lead width can be 0.61 max. in dambar area GPS05144 Figure 16 P-DSO-24-3 (Plastic Dual Small Outline Package) You can find all of our packages, sorts of packing and others in our Infineon Internet Page “Products”: http://www.infineon.
PAGE 28
TCA 3727 Revision History: 2004-10-01 Previous Version: 1.0, 1998-12-16 Page Rev. 2.0 Subjects (major changes since last revision) Template: ap_a5_vr_tmplt.
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Edition 2004-10-01 Published by Infineon Technologies AG, St.-Martin-Strasse 53, 81669 München, Germany © Infineon Technologies AG 2004. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved.