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PDF TLE4728G Data sheet ( Hoja de datos )
| Número de pieza | TLE4728G | |
| Descripción | 2-Phase Stepper-Motor Driver | |
| Fabricantes | Siemens | |
| Logotipo |  |
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ICs for Automotive Electronics
TLE 4728 G
2-Phase Stepper-Motor Driver
Data Sheet 10.95
1 page  
TLE 4728 G
Pin Definitions and Functions
Pin Function
1, 2, 23, 24
Digital control inputs IX0, IX1 for the magnitude of the current of the particular
phase.
Iset = 450 mA with Rsense = 1 Ω
IX1 IX0
Phase Current
HH
HL
LH
LL
0
0.155 × Iset
Iset
1.55 × Iset
Example of Motor
Status
No current1)
Hold
Normal mode
Accelerate
3
5 ... 8, 17 ... 20
4
10
9, 12
11
14
13, 16
15
21
22
1) "No current" in both bridges inhibits the circuit and current consumption will
sink below 3 mA
Input phase 1; controls the current through phase winding 1. On H-potential the
phase current flows from Q11 to Q12, on L-potential in the reverse direction.
Ground; all pins are connected at leadframe internally.
Oscillator; works at approx. 25 kHz if this pin is wired to ground across 2.2 nF.
Resistor R1 for sensing the current in phase 1.
Push-pull outputs Q11, Q12 for phase 1 with integrated free-wheeling diodes.
Supply voltage; block to ground, as close as possible to the IC, with a stable
electrolytic capacitor of at least 47 µF in parallel with a ceramic capacitor of
100 nF.
Error 2 output; signals with "low" the errors: short circuit to ground of one or
more outputs or overtemperature.
Push-pull outputs Q22, Q21 for phase 2 with integrated free-wheeling diodes.
Resistor R2 for sensing the current in phase 2.
Error 1 output; signals with "low" the errors: open load or short circuit to + VS
of one or more outputs or short circuit of the load or overtemperature.
Input phase 2; controls the current flow through phase winding 2. On
H-potential the phase current flows from Q21 to Q22, on L-potential in the
reverse direction.
Semiconductor Group
3
5 Page 
TLE 4728 G
This time strongly depends on + VS and inductivity of the load, see diagram below.
Time tIP versus Load Inductivity
Propagation Delay of the Error Flag
Operating conditions:
+ VS = 14 V, Tj = 25 °C, Ierr = 1 mA, load = 3.3 mH, 1 Ω
a) IXX = L, error condition: short circuit to GND.
typ. tPEsc: 45 µs
Semiconductor Group
9
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet TLE4728G.PDF ] | |
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