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AS8846

更新时间： 2024-11-28 21:53:35
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
35页 1432K
描述
Programmable PWM DC Motor Driver / Controller

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AS8846 数据手册

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AS 8446  
Programmable PWM DC Motor Driver / Controller  
DATA SHEET  
Key Features  
-
-
-
Programmable PWM DC Motor Driver / Controller with µP  
Interface (Three Wire Interface)  
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 only by software changes  
makes it easier to implement it in harsh environments.  
The programmability of parameters and functions allows the  
adaptation of the AS8446 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.  
Programmable Functions and Parameters for Motor  
Current, Voltage and Speed Regulation  
Single Voltage Supply in the range  
Vbat = 6.0 V to 18 V (Vbat,max = 30 V)1  
Total Power Efficiency up to 96 %  
-
-
Low RF Emission within the whole frequency range due to  
an integrated special EMC optimized driver  
Dynamically self-adjusting slew rate regulated switching  
technology  
-
-
-
-
-
Fully protected by programmable failure handling  
procedures via µP  
Fast Over Current and Over / Under Voltage Detection  
and Protection, Battery Voltage Monitoring  
External and On Chip Temperature Detection and  
Protection  
Applications  
Motor Current and Speed Measurement with a shunt  
resistor and capability of trimming the chip for an external  
shunt value  
-
-
-
-
-
Fan cooler  
Air conditioning  
Fuel pumps  
-
Programmable Parameters:  
Water and oil pumps  
General purpose DC Motor Regulators  
• EMC compliant Driver Functions  
• Over Current, Over / Under Voltage  
Threshold Values  
Typical Application Diagram  
• Motor Failure Threshold Levels  
Power part  
Control part  
Vbat  
• 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.)  
Cbat  
1
28  
27  
CMN  
VSS  
2
3
4
5
6
7
8
9
GND_P  
CMP  
VMO  
Vbat  
TP  
Tr1  
OUT 26  
-
-
Vpump25  
CP12  
Rref  
CP0  
24  
CP2  
23  
CP1  
PWMout  
FAIL  
CS  
INR  
CS  
22  
µP  
VDDctrl  
VDD = 5 V  
D1  
(optional)  
Q1  
21  
VDD  
ANA  
ADC  
OSC2  
OSC1  
VDD  
M+  
M-  
20  
Iref  
Wake-up  
CLK  
GND  
Port1  
Port2  
-
-
Standby and Wake-up capability  
19  
RESET  
10 n.c.  
18  
RT1  
11 Test1  
WD  
Sleep / Wake-up Mode system controlled by the µP and  
the Wake-up Pin  
M
12  
17  
Test2  
Test3  
RNTC  
13  
16  
RESET  
Tout  
SPIout  
SPIin  
DATAin  
PWM  
14  
15  
CLK  
DATAout  
-
SOIC 28 Package  
VSS  
GND_P  
General Description  
The AS8446 is a complete and fully protected PWM DC motor  
driver/controller, which can be implemented by interfacing a  
low cost 8-bit µP and a high-side N-channel power FET  
switch.  
1 Low-Batttery-mode between 6.0 V and 6.5 V  
Revision 1.8, Date 2005-03-17  
Page 1 of 35  
1234567...35

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