E-L9935 STMicroelectronics, E-L9935 Datasheet - Page 16
![IC STEPPER MOTOR DVR 2PH 20PWRSO](/photos/6/93/69347/497-20-powersoic_series_sml.jpg)
E-L9935
Manufacturer Part Number
E-L9935
Description
IC STEPPER MOTOR DVR 2PH 20PWRSO
Manufacturer
STMicroelectronics
Type
2 Phase Stepper Motor Driverr
Datasheet
1.L9935.pdf
(29 pages)
Specifications of E-L9935
Applications
Stepper Motor Driver, 2 Phase
Number Of Outputs
1
Current - Output
±1.2A
Voltage - Supply
8 V ~ 24 V
Operating Temperature
-40°C ~ 150°C
Mounting Type
Surface Mount
Package / Case
PowerSO-20 Exposed Bottom Pad
Product
Stepper Motor Controllers / Drivers
Operating Supply Voltage
14.4 V
Supply Current
4.5 mA
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Load
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
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Functional description
5.5
16/29
next data transfer took place. After detection of a short to V
corresponding bridge to reduce power dissipation for at least 1ms.
Diagnosis of a short to V
During the short current through the sink transistor will rise more rapidly than under normal
load conditions. Reaching a peak current of 1.5 times the maximum PWM current between
typically 2 µs and 5 µs
after turn on will be detected as a short to V
Detecting a short the low side transistor will try to turn on again the next 7 trigger pulse of
the oscillator.
Simultaneously the error flag will updated on each pulse.
Figure 8.
Between t
Between t
(1.5 times the current of current setting LL).
Overcurrent now will set the error flag.
After t
Exceeding this current will just turn off the sink transistor. This is considered as normal
operation. The error flag is detached from the comparator after t
during normal pulse width modulation.
PWM
on
short
the current threshold is the nominal PWM current set by the external resistor.
and t
Normal PWM current versus short circuit current and detection of short
to V
and t
S
short
PWM
the over current detection is totally blanked.
the current threshold is set to 1.5 times the maximum PWM current
Doc ID 5198 Rev 9
S
S
.
S
we suggest to turn off the
PWM
so no error flag is set
L9935