Data Sheet 3 Rev. 1.1, 2008-06-16
TLE4726G
Pin Definitions and Functions
Pin No. Function
1, 2, 23, 24 Digital control inputs IX0, IX1 for the magnitude of the current of the
particular phase.
3 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.
5, 6, 7, 8, 17,
18, 19, 20
Ground; all pins are connected internally.
4 Oscillator; works at approx. 25 kHz if this pin is wired to ground across
2.2 nF.
10 Resistor
R
1
for sensing the current in phase 1.
9, 12 Push-pull outputs Q11, Q12 for phase 1 with integrated free-wheeling
diodes.
11 Supply voltage; block to ground, as close as possible to the IC, with a
stable electrolytic capacitor of at least 10 μF in parallel with a ceramic
capacitor of 220 nF.
14 Logic supply voltage; either supply with 5 V or connect to +
V
S
across
a series resistor. A Z-diode of approx. 7 V is integrated. In both cases
block to ground directly on the IC with a stable electrolytic capacitor of
10 μF in parallel with a ceramic capacitor of 100 nF.
13, 16 Push-pull outputs Q22, Q21 for phase 2 with integrated free-wheeling
diodes.
15 Resistor
R
2
for sensing the current in phase 2.
21 Inhibit input; the IC can be put on standby by low potential on this pin.
This reduces the current consumption substantially.
22 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.
IX1 IX0 Phase
Current
Example of
Motor Status
H H 0 No current
H L 1/3
I
max
Hold
L H 2/3
I
max
Set
LL
I
max
Accelerate
typical
I
max
with
R
sense
= 1 Ω: 750 mA
