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TLE4729G
2-Phase Stepper-Motor Driver Bipolar-IC
2-Phase Stepper-Motor Driver
Bipolar-IC
TLE4729G
Features•2 × 0.7 amp. full bridge outputsIntegrated driver, control logic and current control
(chopper)Very low current consumption in inhibit modeFast free-wheeling diodesMax. supply voltage 45VOutput stages are free of crossover currentOffset-phase turn-ON of output stagesAll outputs short-circuit proofError-flag for overload, open load, over-temperatureSMD package P-DSO-24-3
Functional DescriptionTLE4729G is a bipolar, monolithic IC for driving bipolar stepper motors, DC motors and
other inductive loads that operate by constant current. It is fully pin and function
compatible except the current programming is inverse to the TLE4729G with an
additional inhibit feature. 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 0.7A per phase at operating voltages up to 16V.
The direction and value of current are programmable for each phase via separate control
inputs. In the case of low at all four current program inputs the device is switched to
inhibit mode automatically. 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
full-bridge configuration include fast integrated freewheeling diodes and are free of
crossover current. The device can be driven directly by a microprocessor in several
modes by programming phase direction and current control of each bridge
independently.
With the two error outputs the TLE4729G signals malfunction of the device. Setting the
control inputs high resets the error flag and by reactivating the bridges one by one the
location of the error can be found.
Pin Configuration(top view)
Figure1Pin Definitions and Functions
Block Diagram
Figure2Absolute Maximum Ratingsj = – 40 to 150°C
Operating Range
CharacteristicsS = 6 to 16 V; Tj = – 40 to 130 °C
Current Consumption
Oscillator
Phase Current (VS = 9 … 16V)
Logic Inputs (Phase X)
Logic Inputs (IX1; IX0)
Error Outputs
Thermal Protection
Power Outputs
Diode Transistor Sink Pair
(D13, T13; D14, T14; D23, T23; D24, T24)
Diode Transistor Source Pair
(T11, D11; T12, D12; T21, D21; T22, D22)
Characteristics (cont’d)S = 6 to 16 V; Tj = – 40 to 130 °C
For details see next four pages.
These parameters are not 100% tested in production, but guaranteed by design.
Error Output Timing
Characteristics (cont’d)S = 6 to 16 V; Tj = – 40 to 130 °C
DiagramsTiming between IXX and Phase X to prevent setting the error flag
Operating conditions:
+ VS = 14 V, Tj = 25 °C, Ierr = 1 mA, load = 3.3 mH, 1 Ω
If tPI < typ. 5 μs, an error “open load” will be set.
If tIP < typ. 12 μs, an error “open load” will be set.
This time strongly depends on + VS and inductivity of the load, see diagram below.
Time tIP vs. Load Inductivity
Propagation Delay of the Error FlagOperating conditions:
+ VS = 14 V, Tj = 25 °C, Ierr = 1 mA, load = 3.3 mH, 1 Ω03060mHIPsμ
AED02199
IEsc is also measured under the condition: begin of short circuit to GND till error flag set.
Quiescent Current IS vs. Supply Voltage VS; bridges not chopping; Tj = 25 °C
Oscillator Frequency fOsc vs.
Junction Temperature Tj
Quiesc. Current IS vs. Junct. Temp. Tj;bridges not chopping, VS = 14 V
Output Current IQX vs.
Junction Temperature Tj AED02205Ι15
15010050C
Osc
kHz
AED02207
15010050CjS
AED02206
15010050C
600Ι
AED02208
Output Saturation Voltages Vsat
vs. Output Current IQ
Typical Power Dissipation Ptot vs.
Output Current IQ (non stepping)
Forward Current IF of Free-Wheeling Diodes
vs. Forward Voltages VF
Permissible Power Dissipation Ptot vs.
Case Temp. TC (measured at pin 5) 00.2
0.60.40.8AQ
satV
2.0AED0220900.2
0.60.40.8A
totP3AED02211
AED022100F
0.51.01.5V
1.0ΙF-25025
12575C175
totPAED02212
