E520.03A61AC ELMOS Semiconductor, E520.03A61AC Datasheet - Page 15

• Manufacturer Part Number: E520.03A61AC
• Description: Motor / Motion / Ignition Controllers & Drivers 8x low side driver
• Manufacturer: ELMOS Semiconductor
• Type: Unipolar Stepper Motor Driverr

Specifications of E520.03A61AC

• Rohs: yes
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 3.3 V, 5 V
• Supply Current: 5 mA
• Operating Temperature: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Number Of Outputs: 8
• Output Current: 300 mA
• Output Voltage: 3 V to 25 V
• Power Dissipation: 2.8 W

OCC - over-current shut-off time configuration bit
0
1
LOG - selection of PWM characteristic
0
1
PWMA/B/C[4:0] - Constant PWM sources PWMA,
PWMB and PWMC
Duty cycles defined by PWMA[4:0], PWMB[4:0] and
PWMC[4:0] bits
Counter may be configured to linear or logarithmic
mode (via LOG latch)
Relation between output channels and PWM sources
PWMA/B/C is fixed by hardware
STOPz - Stall handling bit
0
1
its STEz flag
6.3 Protection Functions
Supply Control ( VBAT_Sense pin )
The flag bit SUP is set if a LOW level has been detected on the VBAT_SENSE input pin The SUP bit is automatically
cleared at the end of each SPI frame.
Over-temperature Protection
If the chip temperature exceeds the over-temperature
protection threshold T
bled immediately. In contrast to the short circuit pro-
tection, the driver latches will not be reset. When the
chip temperature decreases below the threshold T
the previous driver status will be restored without the
need for a new SPI protocol.
If a new driver status is transferred to the driver latches
during over-temperature condition, this new status will
Short Circuit Protection
When the output current exceeds the value of I
internal timer is started and the current limitation is
activated for the concerned driver. If the current limi-
tation is still active when the timer has expired after
the time T
ting the related driver latch. After disabling the output
the short circuit status is automatically cleared and it
is possible to re-activate the outputs by writing 0b bits
into the shift register via the serial input SI. In case that
the short circuit is still present, the current limitation is
again activated and the output is again disabled after
This document contains information on a pre-production product. ELMOS Semiconductor AG reserves the right to change specifications and information herein without notice.
b
b
b
b
b
b
12 / 8 ChANNeL LOw SIDe DRIveR wITh STALL DeTeCTION
PRODUCTION DATA - JUL 24, 2012
ELMOS Semiconductor AG
corresponds to a time constant of typically 37ms
corresponds to a time constant of typically 2ms
selects Linear PWM mode
selects Logarithmic PWM mode for LED control
has no effect on the motor driver
related motor driver will be stopped if 1
SCL
, the concerned output is disabled by reset-
TH,OFF
, all output drivers are disa-
b
appears in
SCL
TH,ON
, an
Data Sheet
15/29
,
STWx - Stall detection warning
0
1
ed that the controller saves the current motor position
for later use.)
FSWx - Stepping frequency supervisor
0
1
matically disabled
OCEx - Over-current status flag
0
1
STEx - Stall detection indication
0
1
SDSx - Stall detection senitivity
100
be valid as soon as the chip temperature has decreased
below the threshold T
tent of the driver latch is changed by other means, e.g.
due to an external reset.
• The flag bit OVT represents the over-temperature
the time T
channels may be read back over the SPI register address
0010
The flag OC is set by the short circuit protection logic
and indicates that at least one over-current state bit in
the over-current status register at address 0010
The OC flag is automatically cleared at the end of an SPI
frame accessing the over-current status register at ad-
dress 0010
b
b
b
b
b
b
b
b
no warning accured
indicates potential stall condition (It is recommend-
stepping frequency ok
stepping frequency unstable, stall detection auto-
normal state
over-current detected
no stall indication
stall situation detected
b
status. If an over-temperature condition is present,
this bit will be set to HIGH state and all drivers will
be disabled.
sensitivity default value
b
.
SCL
b
with no over-current state present.
. The over-current status flags OCEx of all
TH,ON
e520.01/02/03/08
. This also applies if the con-
QM-No.: 25DS0054E.02
b
is set.