Q67000-A8302 Просмотр технического описания (PDF) - Infineon Technologies

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Q67000-A8302

2-Phase Stepper-Motor Driver Bipolar IC

Infineon Technologies 

TCA 3727

Table 1

Pin Definitions and Functions (cont’d)

Pin No.

9 (11)1)

12 (14)1)

Function

Supply voltage; block to ground, as close as possible to the IC, with

a stable electrolytic capacitor of at least 10 µF in parallel with a

ceramic capacitor of 220 nF.

Logic supply voltage; either supply with 5 V or connect to +VS

across a series resistor. A Z-diode of approx. 7 V is integrated. In both

cases block to ground directly on the IC with a stable electrolytic

capacitor of 10 µF in parallel with a ceramic capacitor of 100 nF.

11, 14

(13, 16)1)

13 (15)1)

17 (21)1)

18 (22)1)

Push-pull outputs Q22, Q21 for phase 2 with integrated free

wheeling diodes.

Resistor R2 for sensing the current in phase 2.

Inhibit input; the IC can be put on standby by low potential on this

pin. This reduces the current consumption substantially.

Input phase 2; controls the current flow through phase winding 2. On

H-potential the phase current flows from Q21 to Q22, on L potential in

the reverse direction.

1) TCA 3727 G only

Table 2

Digital Control Inputs IX0, IX1

typical Imax with Rsense = 1 Ω, 750 mA

IX1 IX0 Phase Current

H

H

0

H

L

1/3 Imax

L

H

2/3 Imax

L

L

Imax

Example of Motor Status

No current

Hold

Set

Accelerate

Data Sheet

4

Rev. 2.0, 2004-10-01

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