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33970

更新时间： 2022-04-23 23:00:11

品牌	Logo	应用领域
飞思卡尔 - FREESCALE		驱动器仪表
页数	文件大小	规格书
36页	2043K
描述
Dual Gauge Driver Integrated Circuit with Improved Damping Algorithms

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33970 数据手册

Document Number: MC33970

Rev. 3.0, 1/2007

Freescale Semiconductor

Advance Information

Dual Gauge Driver Integrated

Circuit with Improved Damping

Algorithms

33970

IMPROVED GAUGE DRIVER

This 33970 is a single-packaged, Serial Peripheral Interface (SPI)

controlled, dual step motor gauge driver integrated circuit (IC). This

monolithic IC consists of four dual output H-Bridge coil drivers and the

associated control logic. Each pair of H-Bridge drivers is used to

automatically control the speed, direction, and magnitude of current

through the two coils of a two-phase instrumentation step motor,

similar to an MMT-licensed AFIC 6405.

INTEGRATED CIRCUIT

The 33970 is ideal for use in automotive instrumentation systems

requiring distributed and flexible step motor gauge driving. The

device also eases the transition to step motors from air core motors

by emulating the air core pointer movement with little additional

processor bandwidth utilization.

DW SUFFIX

EG SUFFIX (Pb-FREE)

98ASB42344B

24-PIN SOICW

Features

ORDERING INFORMATION

Temperature

• MMT-Licensed Two-Phase Step Motor Compatible

• Minimal Processor Overhead Required

• Fully Integrated Pointer Movement and Position State Machine

with Air Core Movement Emulation

• 4096 Possible Steady State Pointer Positions

• 340° Maximum Pointer Sweep

• Fixed Maximum Acceleration and Deceleration of 4500°/s²

• Maximum Pointer Velocity of 400°/s

Device

Package

Range (T )

MC33970DW/R2

MCZ33970EG/R2

-40°C to 125°C

24 SOICW

• Analog Microstepping (12 Steps/Degree of Pointer Movement)

• Pointer Calibration and Return to Zero

• SPI-Controlled 16-Bit Word

• Calibratable Internal Clock

• Low Sleep Mode Current

• Backward Compatible with MC33991

• Improved Pointer Movement, Diagnostics, and Return to Zero (RTZ)

• Pb-Free Packaging Designated by Suffix Code EG

V_PWR

33970

VPWR

SIN0+

SIN0-

V_DD

5.0 V

VDD

Regulator

Motor 0

Motor 1

COS0+

COS0-

RTZ

RST

SCLK

SIN1+

SIN1-

MCU

COS1+

COS1-

GND

Figure 1. 33970 Simplified Application Diagram

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

12 3 4 5 6 7...36

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