L6470PD STMicroelectronics, L6470PD Datasheet - Page 21

• 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

L6470
6
6.1
6.2
6.3
Functional description
Device power-up
At power-up end, the device state is the following:
●
●
●
●
●
During power-up, the device is under reset (all logic IOs disabled and power bridges in high
impedance state) until the following conditions are satisfied:
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●
●
Any motion command makes the device exit from High Z state (HardStop and SoftStop
included).
Logic I/O
Pins CS, CK, SDI, STCK, SW and STBY\RST are TTL/CMOS 3.3 V - 5 V compatible logic
inputs.
Pin SDO is a TTL/CMOS compatible logic output. VDD pin voltage sets the logic output pin
voltage range; when it is connected to VREG or 3.3 V external supply voltage, the output is
3.3 V compatible. When VDD is connected to a 5 V supply voltage, SDO is 5 V compatible.
VDD is not internally connected to V
A 10 µF capacitor should be connected to the VDD pin in order to obtain a proper operation.
Pins FLAG and BUSY\SYNC are open drain outputs.
Charge pump
To ensure the correct driving of the high-side integrated MOSFETs, a voltage higher than
the motor power supply voltage needs to be applied to the VBOOT pin. The high-side gate
driver supply voltage, V
realizing a charge pump (see
Registers are set to default
Internal logic is driven by internal oscillator and a 2 MHz clock is provided by the
OSCOUT pin
Bridges are disabled (High Z)
UVLO bit in the STATUS register is forced low (fail condition)
FLAG output is forced low.
V
V
Internal oscillator is operative.
S
REG
is greater than V
is greater than V
boot
SthOn
, is obtained through an oscillator and a few external components
REGth
Figure
Doc ID16737 Rev 5
= 2.8 V typical
REG
5).
, an external connection is always needed.
Functional description
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