TLE5250 Datasheet, PDF (16/22 Pages) Siemens Semiconductor Group – 2.5-A High Performance Smart Power Stepper-Motor Driver with Diagnostic Interface

TLE 5250
Phase = High or Low
Enable
2.3 V
1.8 V
V_RC/Sync 0.8 V
QRSFF
SI OUT
Coil
Current
Actual
Voltage
Discharge operation is started
when nominal current is reached.
C_T is discharged by R_T .
Voltage on RC/Sync was limited
internally to 2.3 V in charge
operation.
When coil current reaches nominal
value, sink transistor is turned off.
Independently of this, RC element is
charged up to 1.8 V and then
discharged.
Charge operation is controlled by
deadtime comparator. RC element is
charged with 1mA.
AED01475
Figure 7 Chopper Mode with External Capacitor CT and Resistor RT
Semiconductor Group
16
1998-02-01