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PDF TLE4728G Data sheet ( Hoja de datos )
| Número de pieza | TLE4728G | |
| Descripción | 2-Phase Stepper-Motor Driver | |
| Fabricantes | Infineon Technologies | |
| Logotipo |  |
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2-Phase Stepper-Motor Driver
TLE 4728 G
Overview
Features
• 2 × 0.7 amp. full bridge outputs
• Integrated driver, control logic and current control
(chopper)
• Fast free-wheeling diodes
• Max. supply voltage 45 V
• Output stages are free of crossover current
• Offset-phase turn-ON of output stages
• All outputs short-circuit proof
• Error-flag for overload, open load, overtemperature
• SMD package P-DSO-24-3
Bipolar-IC
Type
TLE 4728 G
Ordering Code
Q67006-A9077
Package
P-DSO-24-9
Description
TLE 4728 G is a bipolar, monolithic IC for driving bipolar stepper motors, DC motors and
other inductive loads that operate by 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 0.7 A per phase at operating voltages up to 16 V.
The direction and value of current are programmable 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 full-bridge configuration
include fast integrated free wheeling 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 TLE 4728 G 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.
Data Sheet 1 2004-03-01
1 page  
TLE 4728 G
Absolute Maximum Ratings
Tj = – 40 to 150 °C
Parameter
Symbol Limit Values
min. max.
Supply voltage
VS
Error outputs
VErr
IErr
Output current
IQ
Ground current
IGND
Logic inputs
VIXX
Oscillator voltage
VOSC
R1, R2 input voltage
VRX
Junction temperature
Tj
Tj
Storage temperature
Tstg
Thermal resistances
Junction-ambient
Rth ja
Junction-ambient
Rth ja
(soldered on a 35 µm thick
20 cm2 PC board copper
area)
Junction-case
Rth jc
– 0.3
– 0.3
–
–1
–2
– 15
– 0.3
– 0.3
–
–
– 50
45
45
3
1
–
15
6
5
125
150
125
– 75
– 50
– 15
Unit Remarks
V–
V–
mA –
A–
A–
V IXX; Phase 1, 2
V–
V–
°C –
°C Max. 10,000 h
°C –
K/W –
K/W –
K/W Measured on pin 5
Note: Stresses above those listed here may cause permanent damage to the
device. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
Data Sheet 5 2004-03-01
5 Page 
TLE 4728 G
b) IXX = L, error condition: open load (equivalent: short circuit to + VS).
Phase X
Error 1
t PEol
IET01884
typ. tPEol: 15 µs
Figure 6
c) Phase X = H or L, const.; error condition: short circuit to GND.
ΙXX
Error 2
t IEsc
IET01885
typ. tIEsc: 30 µs
tIEsc is also measured under the condition: begin of short circuit to GND till
error flag set.
Figure 7
Data Sheet 11 2004-03-01
11 Page | ||
| Páginas | Total 25 Páginas | |
| PDF Descargar | [ Datasheet TLE4728G.PDF ] | |
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