L6470PD STMicroelectronics, L6470PD Datasheet - Page 31

• 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
6.14
6.15
6.16
Programmable DMOS slew rate, deadtime and blanking time
Using the POW_SR parameter in the CONFIG register, it is possible to set the commutation
speed of the power bridges output (see
Integrated analog-to-digital converter
The L6470 integrates an N
reference voltage equal to VREG. The analog-to-digital converter input is available through
the ADCIN pin and the conversion result is available in the ADC_OUT register (see
Section
Sampling frequency is equal to the programmed PWM frequency.
The ADC_OUT value can be used for motor supply voltage compensation or can be at the
user’s disposal.
Internal voltage regulator
The L6470 integrates a voltage regulator which generates a 3 V voltage starting from the
motor power supply (VSA and VSB). In order to make the voltage regulator stable, at least
22 µF should be connected between the VREG pin and ground (suggested value is 47 µF).
The internal voltage regulator can be used to supply the VDD pin in order to make the
device digital output range 3.3 V compatible
compatible, may be obtained connecting the VDD pin to an external 5 V voltage source. In
both cases, a 10 µF capacitance should be connected to the VDD pin in order to obtain a
correct operation.
The internal voltage regulator is able to supply a current up to I
consumption included (I
that can be supplied is I
If an external 3.3 V regulated voltage is available, it can be applied to the VREG pin in order
to supply all the internal logic and to avoid power dissipation of the internal 3 V voltage
regulator
VREG pin.
Figure 13. External switch connection
9.1.16).
(Figure
14). The external voltage regulator should never sink current from the
REG
logic
ADC
). When the device is in Standby mode, the maximum current
,
STBY
Doc ID16737 Rev 5
bit ramp-compare analog-to-digital converter with a
, internal consumption included (I
Table
(Figure
26,
Section
14). A digital output range, 5 V
9.1.21).
REG,MAX
logic
Functional description
,
, internal logic
STBY
).
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