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TCA3727INFINEONN/a100avaiSmart Motorbridges + Driver ICs
TCA3727GINFINEON ?N/a40avaiSmart Motorbridges + Driver ICs
TCA3727SIEMN/a500avaiSmart Motorbridges + Driver ICs


TCA3727 ,Smart Motorbridges + Driver ICs 2-Phase Stepper-Motor Driver TCA 3727Overview Bipolar IC
TCA3727 ,Smart Motorbridges + Driver ICs 2-Phase Stepper-Motor Driver TCA 3727Overview Bipolar IC
TCA3727G ,Smart Motorbridges + Driver ICs 2-Phase Stepper-Motor Driver TCA 3727Overview Bipolar IC
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TCA3727-TCA3727G
Smart Motorbridges + Driver ICs
2-Phase Stepper-Motor Driver
Overview
Bipolar
TCA 3727
Features
2 x 0.75 amp. / 50 V outputsIntegrated driver, control logic and current control
(chopper)Fast free-wheeling diodesMax. supply voltage 52 VOutputs free of crossover currentOffset-phase turn-ON of output stagesZ-diode for logic supplyLow standby-current drainFull, 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.
TCA 3727
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.
Figure 1Pin Configuration

(top view)

TCA 3727

Pin Definitions and Functions

TCA 3727
TCA 3727 G only
Pin Definitions and Functions

(cont’d)
TCA 3727

Figure 2Block Diagram TCA 3727
TCA 3727

Figure 3Block Diagram TCA 3727 G

TCA 3727


Absolute Maximum Ratings

= – 40 to 125
TCA 3727
Operating Range
Thermal Resistances
TCA 3727
Characteristics
S = 40 V; VL = 5 V; – 25 °C £ Tj £ 125 °C
Current Consumption
Oscillator
Phase Current Selection (R1; R2)
Current Limit Threshold
Logic InputsX1 ; IX0 ; Phase x)
TCA 3727
Standby Cutout (inhibit)
Internal Z-Diode
Power Outputs
Diode Transistor Sink Pair
(D13, T13; D14, T14; D23, T23; D24, T24)
Diode Transistor Source Pair
(D11, T11; D12, T12; D21, T21; D22, T22)
Characteristics (cont’d)
S = 40 V; VL = 5 V; – 25 °C £ Tj £ 125 °C
TCA 3727
Quiescent Current IS, IL versus
Supply Voltage VS
Output Current IQX versus
Junction Temperature Tj
Quiescent Current IS, IL versus
Junction Temperature Tj
Operating Condition:
L = 5 VInh = HOSC = 2.2 nFsense = 1 W
Load: L = 10 mH
R = 2.4 Wphase = 50 Hz
mode:fullstep
0102030V500
IED01655SS,LI
-250255075100C150I
IED01657
-250255075100150C
IED01656TIS,
TCA 3727
Output Saturation Voltages Vsat
versus Output Current IQ
Typical Power Dissipation Ptot versus
Output Current IQ (Non Stepping)
Forward Current IF of Free-Wheeling
Diodes versus Forward Voltages V
Permissible Power Dissipation Ptot
versus Case Temperature TC
0.5
1.0V1.5FF
IED01660
totP
100-250502575C175
125
TCA 3727
Input Characteristics of Ixx, Phase X,
Inhibit
Oscillator Frequency fOSC versus
Junction Temperature Tj
Input Current of Inhibit versus
JunctionTemperature Tj
-5-23.926
0.4I
VIXX
kHz
-250255075100125C150OSCf
IED01663
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