AMIS30522C5222G ON Semiconductor, AMIS30522C5222G Datasheet - Page 18

• Manufacturer Part Number: AMIS30522C5222G
• Description: IC MOTOR DVR MICRO STEP 32QFP
• Manufacturer: ON Semiconductor
• Type: Stepper Motor Driverr

Specifications of AMIS30522C5222G

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: 1.2A
• Voltage - Supply: 6 V ~ 30 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 32-VSQFP
• Package: 32NQFP EP
• Maximum Operating Current: 8 mA
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 6 V to 30 V
• Supply Current: 8 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

Warning, Error Detection and Diagnostics Feedback
Thermal Warning and Shutdown
warning bit <TW> is set (Table 16 SPI Status Register 0). If
junction temperature increases above thermal shutdown
level, then the circuit goes in “Thermal Shutdown” mode
(<TSD>) and all driver transistors are disabled (high
impedance) (Table 16 SPI Status Register 2). The conditions
to reset flag <TSD> is to be at a temperature lower than T
and to clear the <TSD> flag by reading it using any SPI read
command.
Overcurrent Detection
current in each activated output stage. If the load current
exceeds the overcurrent detection threshold, then the
overcurrent flag is set and the drivers are switched off to
reduce the power dissipation and to protect the integrated
circuit. Each driver transistor has an individual detection bit
in the Table 16 SPI Status Registers 1 and SPI Status
Register 2 (<OVCXij> and <OVCYij>). Error condition is
latched and the microcontroller needs to clear the status bits
to reactivate the drivers.
When Junction temperature rises above T
The overcurrent detection circuit monitors the load
SLA−Pin
PWMsh
V
Icoil=0
SLAT
COIL
V
PWMsh
SLAT = 1 => SLA−pin is “transparent” during
V
Crossing. SLA−pin is updated “real−time”.
COIL
Icoil=0
BEMF
sampling @ Coil Current Zero
div2
div4
Ssh
Figure 14. Timing Diagram of SLA−Pin
TW
Csh
, the thermal
http://onsemi.com
retained
Sh
is
sample
last
TW
18
Ch
SLAT = 0 => SLA−pin is not “transparent”
during V
Crossing. SLA−pin is updated when leaving
current−less state.
V
Note: Successive reading the SPI Status Registers 1 and 2 in
case of a short circuit condition, may lead to damage to the
drivers.
Open Coil Detection
duty cycle of the PWM regulator. If in a coil 100% duty cycle
is detected for longer than 32 ms the appropriate status bit in
the SPI status register is set (<OPENX> or <OPENY>).
(Table 16: SPI Status Register 0).
battery voltage is low, it can happen that the motor driver is
not able to deliver the requested current to the motor. Under
these conditions the PWM controller duty cycle will be
100% and after 32 ms, the error pin and <OPENX>,
<OPENY> will flag this situation (motor current is kept
alive). This feature can be used to test if the operating
conditions (supply voltage, motor coil resistance) still allow
reaching the requested coil−current or else the coil−current
should be reduced.
SLAT
NOT (Icoil=0)
BEMF
Open coil detection is based on the observation of 100%
When the resistance of a motor coil is very large and the
buf
BEMF
previous output is
kept at SLA pin
sampling @ Coil Current Zero
SLA−Pin
retain last sample
t
t