L6470PD STMicroelectronics, L6470PD Datasheet - Page 30

• Manufacturer Part Number: L6470PD
• Description: Motor / Motion / Ignition Controllers & Drivers dSPIN 7.0A 8 - 45 V DMOS Motor Driver
• Manufacturer: STMicroelectronics
• Type: 2 Phase Stepper Motor Driverr

Specifications of L6470PD

• Rohs: yes
• Product: Stepper Motor Controllers / Drivers
• Operating Temperature: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Package / Case: POWERSO-36
• Number Of Outputs: 4
• Output Current: 3 A
• Output Voltage: 3.2 V
• Power Dissipation: 5 W

Functional description
6.12
6.13
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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 I
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 any motion command
makes the device exit High Z state (HardStop and SoftStop included).
External switch (SW pin)
The SW input is internally pulled up to V
ground (see
The SW_F bit of the STATUS register indicates if the switch is open (‘0’) or closed (‘1’) (see
Section
SW_EVN flag of the STATUS register is raised when a switch turn-on event (SW input falling
edge) is detected (see
(see
By default, a switch turn-on event causes a HardStop interrupt (SW_MODE bit of CONFIG
register set to ‘0’). Otherwise (SW_MODE bit of CONFIG register set to ‘1’), switch input
events do not cause interrupts and the switch status information is at the user’s disposal
(see
The switch input may be used by the GoUntil and ReleaseSW commands as described in
Section 9.2.10
If the SW input is not used, it should be connected to VDD.
Section
Table
cpwu
Attention: It is not recommended to reset the device when outputs are
9.1.22); the bit value is refreshed at every system clock cycle (125 ns). The
STBY,min
34,
must be given to allow the charge pump startup.
Figure
9.2.20).
Section
and 9.2.11.
in order to ensure the complete switch to Standby mode.
active. The device should be switched to high impedance
state before being reset.
13).
Section
9.1.22).
Doc ID16737 Rev 5
9.1.22). A GetStatus command releases the SW_EVN flag
DD
and detects if the pin is open or connected to
REG,STBY
; as a result, the L6470
logicwu
must be given
L6470