Datasheet > AS8446

AS8446

更新时间： 2024-02-09 19:56:14

品牌	Logo	应用领域
艾迈斯 - AMSCO		驱动器电机控制器
页数	文件大小	规格书
1页	45K
描述
Programmable PWM DC Motor Driver / Controller

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AS8446 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	Reach Compliance Code：	compliant
ECCN代码：	EAR99	风险等级：	5.66
Is Samacsys：	N	其他特性：	DESIGNED TO USE WITH ALCATEL DYNAMITE MTK-20140, LG AND HEIGHT DIM INCLUDES TERM, TURNS RATIO: 2:1
认证：	UL	高度：	12.7 mm
长度：	17.91 mm	安装特点：	SURFACE MOUNT
最高工作温度：	85 °C	最低工作温度：	-40 °C
物理尺寸：	L17.91XB13.46XH12.7 (mm)	表面贴装：	YES
变压器类型：	TELECOM TRANSFORMER	宽度：	13.46 mm
Base Number Matches：	1

AS8446 数据手册

AS 8444 / AS 8446

Programmable PWM DC Motor Driver / Controller

FEATURES

It is an advanced PWM DC motor controller subsystem with

an excellent EMC behavior targeted especially for high

current automotive applications. The optimization of the

EMC behavior of the entire module without external

components makes it easier to implement in harsh

environments.

Key Features

Programmable PWM DC Motor Driver / Controller with

µP Interface (Three Wire Interface)

Programmable Functions and Parameters for Motor

Current, Voltage and Speed Regulation

Single Voltage Supply in the range

Vbat = 6.0 V to 30 V (Vbat,max = 40 V)

Total Power Efficiency up to 96 %

Low RF Emission within the whole frequency range due

to an integrated special EMC compliant driver

No EMC Filters required

The programmability of parameters and functions allows the

adaptation of the AS8444 to a wide range of applications.

So the system can act either as a motor current or motor

speed or motor voltage regulator. Also a full diagnosis of

motor failures and power FET failures, over temperature

and over/under voltage can be formed by programmable

failure handling procedures using the motor characteristic

and the real time measured motor current, motor speed and

battery voltage.

Driver fulfils EMC Level 5 (CISPR 25)

Dynamically self-adjusting slew rate regulated switching

technology

Fully protected by programmable failure handling

procedures via µP

To simplify the application of this motor regulator in

complex systems (e.g. automotive environment) the circuit

is endowed with a LIN bus interface.

Fast Over Current and Over / Under Voltage Detection

and Protection, Battery Voltage Monitoring

External and On Chip Temperature Detection and

Protection

There are two versions of this chip AS8444 and AS8446.

The only difference between the AS8444 and the AS8446 is

the start up behavior after system wake up or battery

connection.

Motor Current and Speed Measurement with a shunt

resistor and capability of trimming the chip for an

external shunt value

Applications

LIN Bus Interface

Programmable Parameters:

Fan cooler

Air conditioning

• EMC compliant Driver Functions

• Over Current, Over / Under Voltage

Threshold Values

Fuel pumps

Water and oil pumps

General purpose DC Motor Regulators

• Motor Failure Threshold Levels

• Motor Current Measurement Range

• Trimming for the current measurement shunt

• PWM Frequency, Charge Pump Monitor

Charge Pump to control high side drivers

Integrated 5 V Power Supply for external components

(µP, etc.)

Typical Application Diagram

Power part

Control part

Vbat

Cbat

CMN

CMP

VSS

Standby and Wake-up capability

GND_P

Tr1

OUT ²⁶

VMO

Vbat

Sleep / Wake-up Mode system controlled by the µP and

the LIN Bus

Vpump25

Bus

(optional)

CP12

Rref

CP0

CP2

CP1

PWMout

FAIL

INR

µP

VDDctrl

ANA

CLK

SOIC 28 Package

VDD = 5 V

(optional)

VDD

ADC

LIN

OSC2

OSC1

VDD

M+

M-

Iref

RESET ¹⁹

10 n.c.

¹¹Tx

GND

Port1

Port2

R_T1

General Description

12 Rx1

Rx2 17

R_NTC

RESET

Tout

DATAin

PWM

SPIout

SPIin

CLK

DATAout

The AS8444 is a complete and fully protected PWM DC

motor driver/controller, which could be implemented by

interfacing a low cost 8-bit µP and a high-side N-channel

power FET switch.

VSS

GND_P

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