POWERSTEP01 datasheet(23/92 Pages) STMICROELECTRONICS

Part #	POWERSTEP01

Description	System-in-package integrating microstepping controller and 10 A power MOSFETs

PDF	92 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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23 / 92 page

DocID025022 Rev 5

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powerSTEP01

Functional description

Figure 5. Charge pump circuitry

7.4

Microstepping

The driver is able to divide the single step into up to 128 microsteps. Stepping mode can be

programmed by the STEP_SEL parameter in the STEP_MODE register (Table 27 on

page 61). In current mode driving the maximum microstepping resolution is 1/16th of the

step.

Step mode can only be changed when bridges are disabled. Every time the step mode is

changed, the electrical position (i. e. the point of microstepping sinewave that is generated)

is reset to zero and the absolute position counter value (Section 7.5) becomes meaningless.

Figure 6. Normal mode and microstepping (128 microsteps)

PUMP

to high-side

gate drivers

BOOT

FLY

VBOOT

VDD

Charge pump oscillator

+ V

AM12827v1

step 1

step 2step 3step 4

step 1

Reset

position

step 1

step 2 step 3 step 4

Normal driving

Microstepping

PHASE A current

PHASE B current

PHASE A current

PHASE B current

microsteps

128

μsteps

128

μsteps

128

μsteps

128

μsteps

Reset

position

AM12828v1

POWERSTEP01 Datasheet(PDF) 23 Page - STMicroelectronics

POWERSTEP01 Datasheet(HTML) 23 Page - STMicroelectronics

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