L6470 datasheet(11/70 Pages) STMICROELECTRONICS

Part #	L6470

Description	dSPIN fully integrated microstepping motor driver with motion engine and SPI

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L6470

Electrical characteristics

Doc ID16737 Rev 4

11/70

3

Electrical characteristics

VSA = VSB = 36 V; VDD = 3.3 V; internal 3 V regulator; TJ = 25 °C, unless otherwise

specified.

Table 5.

Electrical characteristics

Symbol

Parameter

Test condition

Min. Typ.

Max. Unit

General

VSthOn

VS UVLO turn-on threshold

7.5

8.2

8.9

V

VSthOff

VS UVLO turn-off threshold

6.6

7.2

7.8

V

VSthHyst

VS UVLO threshold hysteresis

0.7

1

1.3

V

Iq

Quiescent motor supply current

Internal oscillator selected;

VREG = 3.3 V ext; CP

floating

0.5

0.65

mA

Tj(WRN)

Thermal warning temperature

130

°C

Tj(SD)

Thermal shutdown temperature

160

°C

Charge pump

Vpump

Voltage swing for charge pump oscillator

10

V

fpump,min

Minimum charge pump oscillator frequency

(1)

660

kHz

fpump,max

Maximum charge pump oscillator frequency

(1)

800

kHz

Iboot

Average boot current

fsw,A = fsw,B = 15.6 kHz

POW_SR = '10'

1.1

1.4

mA

Output DMOS transistor

RDS(on)

High-side switch on-resistance

Tj = 25 °C, Iout = 3 A

0.37

Ω

Tj = 125 °C,

(2) I

out = 3 A

0.51

RDS(on)

Low-side switch on-resistance

Tj = 25 °C, Iout = 3 A

0.18

Tj = 125 °C,

(2) I

out = 3 A

0.23

IDSS

Leakage current

OUT = VS

3.1

mA

OUT = GND

-0.3

tr

Rise time (3)

POW_SR = '00', Iout = +1 A

100

ns

POW_SR = '00', Iout = -1 A

80

POW_SR = '11', Iout = ±1 A

100

POW_SR = '10', Ilout = ±1 A

200

POW_SR = '01', Iout = ±1 A

300

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