TLE4729-G Datasheet, PDF (3/27 Pages) Infineon Technologies AG – 2-Phase Stepper-Motor Driver Bipolar-IC

TLE 4729 G
Pin Definitions and Functions
Pin
1, 2, 23, 24
Function
Digital control inputs IX0, IX1 for the magnitude of the current of the
particular phase.
I_set = 450 mA with R_sense = 1 Ω
IX1 IX0
LL
LH
HL
HH
Phase Current
0
0.155 × I_set
I_set
1.55 × I_set
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}
50 µA (inhibit-mode)
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 over-temperature.
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
+ V_S of one or more outputs or short circuit of the load or over-
temperature.
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.
Data Sheet
3
2001-04-09