EVAL6472PD STMicroelectronics, EVAL6472PD Datasheet - Page 29

• Manufacturer Part Number: EVAL6472PD
• Description: Power Management IC Development Tools L6472PD 7.0A w/SPI dSPIN 8 to 45V EVAL
• Manufacturer: STMicroelectronics
• Type: Motor / Motion Controllers & Driversr

Specifications of EVAL6472PD

• Product Category: Power Management IC Development Tools
• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: L6472PD
• Input Voltage: 8 V to 45 V
• Output Voltage: 8 V to 45 V
• Interface Type: SPI
• Output Current: 7 A
• For Use With: L6472

L6472
6.10
6.11
6.12
Undervoltage lockout (UVLO)
The L6472 provides motor supply UVLO protection. When the motor supply voltage falls
below the V
GetStatus command is sent to the IC, and the undervoltage condition expires, the UVLO
flag is released (see
the motor supply voltage goes over the V
undervoltage condition, no motion command can be performed. The UVLO flag is forced low
by logic reset (power-up included) even if no UVLO condition is present.
Thermal warning and thermal shutdown
An internal sensor allows the L6472 to detect when the device internal temperature exceeds
a thermal warning or an overtemperature threshold.
When the thermal warning threshold (T
register is forced low (see
and a GetStatus command is sent to the IC (see
When the thermal shutdown threshold (T
shutdown condition: the TH_SD bit in the STATUS register is forced low, the power bridges
are disabled bridges in high-impedance state and the HiZ bit in the STATUS register is
raised (see
The thermal shutdown condition only expires when the temperature goes below the thermal
warning threshold (T
On exiting the thermal shutdown condition, the bridges are still disabled (HiZ flag high);
whichever motion command makes the device exit from High Z state (HardStop and
SoftStop included).
Reset and standby
The device can be reset and put into standby mode through a dedicated pin. When the
STBY\RST pin is driven low, the bridges are left open (High Z state), the internal charge
pump is stopped, the SPI interface and control logic are disabled, and the internal 3 V
voltage regulator maximum output current is reduced to IREG,STBY; as a result, the L6472
heavily reduces the power consumption. At the same time the register values are reset to
default and all protection functions are disabled. STBY\RST input must be forced low at
least for t
On exiting standby mode, as well as for IC power-up, a delay of up to t
before applying a new command to allow proper oscillator and logic startup and a delay of
up to t
On exiting standby mode the bridges are disabled (HiZ flag high) and whichever motion
command causes the device to exit High Z state (HardStop and SoftStop included).
cpwu
Attention: It is not recommended to reset the device when outputs are
STBY,min
must be given to allow the charge pump startup.
SthOff
Section
threshold voltage, the STATUS register UVLO flag is forced low. When a
in order to ensure the complete switch to standby mode.
active. The device should be switched to high-impedance
state before being reset.
9.1.19).
j(WRN)
Section 9.1.19
Section
).
Doc ID 022729 Rev 2
9.1.19) until the temperature decreases below T
and 9.2.20). The undervoltage condition expires when
j(WRN)
j(OFF)
SthOn
) is reached, the TH_WRN bit in the STATUS
) is reached, the device goes into the thermal
threshold voltage. When the device is in the
Section 9.1.19
and 9.2.20).
Functional description
logicwu
must be given
j(WRN)
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