HA13532NT Ver la hoja de datos (PDF) - Hitachi -> Renesas Electronics

Número de pieza

componentes Descripción

Fabricante

HA13532NT

Three-Phase Stepping Motor Control IC

Hitachi -> Renesas Electronics 

HA13532NT

External Conponents

Symbol

Recommended Value Purpose

Notes

Rnf

0.11 Ω ≤ Rnf ≤ 0.33 Ω Current sensing

1

Rt

51 k Ω

Reference current programming

2

Ct

1000 pF

Time constant for PWM carrier frequency 3

C101

≥ 0.1 µF

Power supply decoupling

C102, C103, C104

0.01 µF

Penetration current control

4

C105

1000 pF

Current sensing filter

R101

750 Ω

VR 101

100 kΩ

Motor current little adjustment

Notes: 1. The maximum motor drive current is:

Imax ≈ ±

Vdac + Voffs

Rnf

(1)

where, Vdac: DAC output voltage (see electrical characteristics)

Voffs: Offset voltage (see electrical characteristics)

2. The output sink current Iosnk, output source current Iosrc, and Ct charge/discharge currents Ict+

and Ict– are calculated as follows:

where, set Rt to be 2.5kΩ or higher.

Iosnk

≈

50Vrt

Rt

–

Vbe

Ru

(2)

Iosrc

≈

50Vrt

Rt

–

Vbe

Rd

(3)

Ict+, Ict– ≈

Vrt

Rt

(4)

where, Vrt: Rt voltage (see electrical characteristics)

Ru: pull-up resistance (see electrical characteristics)

Rd: pull-down resistance (see electrical characteristics)

Vbe: base-emitter voltage of driven transistor

3. The PWM carrier frequency fc is calculated as follows:

fc

≈

2Ct

Ict

(Vcth

–

Vctl)

(5)

≈

2CtRt

Vrt

(Vcth

–

Vctl)

(6)

where, Vcth: Ct high voltage (see electrical characteristics)

Vctl: Ct low voltage (see electrical characteristics)

4. Values of C102, C103, C104, C105, R101 are different from using power transistor

6

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