L6470H STMicroelectronics, L6470H Datasheet - Page 19

• Manufacturer Part Number: L6470H
• Description: Motor / Motion / Ignition Controllers & Drivers 8 - 45V 7.0A 1/128 Microstepping SPI
• Manufacturer: STMicroelectronics
• Type: Micro Stepping Motor Driverr
• Series: -r

Specifications of L6470H

• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 8 V to 45 V
• Supply Current: 0.5 mA
• Mounting Style: SMD/SMT
• Package / Case: HTSSOP-28
• Operating Temperature: - 40 C to + 125 C
• Applications: Stepper Motor Driver, 2 Phase
• Evaluation Tools: *
• Number Of Outputs: 1
• Current - Output: 3A
• Voltage - Load: 8 V ~ 45 V
• Voltage - Supply: 3.3V, 5V
• Mounting Type: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 IO disabled and power bridges in high
impedance state) until the following conditions are satisfied:
●
●
●
Any motion command makes the device exiting from High Z state (HardStop and SoftStop
included).
Logic I/O
Pins CS, CK, SDI, STCK, SW and STBY\RST are TTL/CMOS 3.3V-5V 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 3.3V external supply voltage, the output is
3.3V compatible. When VDD is connected to a 5V supply voltage, SDO is 5V compatible.
VDD is not internally connected to V
A 10 µF capacitor should be connected to V
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 2MHz clock is provided by OSCOUT
pin,
Bridges are disabled (High Z),
UVLO bit in 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 ID 16737 Rev 2
,
REG
4).
, an external connection is always needed.
DD
pin in order to obtain a proper operation.
Functional description
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