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AS8846 Datasheet(PDF) 1 Page - ams AG |
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AS8846 Datasheet(HTML) 1 Page - ams AG |
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1 / 35 page  Data Sheet AS8446 Revision 1.8, Date 2005-03-17 Page 1 of 35 Vbat M TP Wake-up Vbat VSS Iref VDDctrl VDD CP2 CP1 Vpump OUT CS CMP DATAout CMN FAIL PWM 25 26 24 23 22 21 20 19 18 17 16 CLK DATAin Test1 Test2 27 28 RESET 1 D1 Cbat Tr1 CP12 CP0 VDD = 5 V Rref R NTC R T1 M+ M- GND_P Power part Control part 15 2 3 4 5 6 7 8 9 10 11 12 13 14 VMO ADC WD µP Q1 OSC1 OSC2 PWMout VDD GND (optional) Test3 n.c. CLK CS INR ANA Port1 Port2 SPIout SPIin RESET Tout GND_P VSS 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 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 - Motor Current and Speed Measurement with a shunt resistor and capability of trimming the chip for an external shunt value - Programmable Parameters: • EMC compliant Driver Functions • Over Current, Over / Under Voltage Threshold Values • 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.) - Standby and Wake-up capability - Sleep / Wake-up Mode system controlled by the µP and the Wake-up Pin - SOIC 28 Package 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 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. Applications - Fan cooler - Air conditioning - Fuel pumps - Water and oil pumps - General purpose DC Motor Regulators Typical Application Diagram AS 8446 Programmable PWM DC Motor Driver / Controller DATA SHEET |
Similar Part No. - AS8846 |
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Similar Description - AS8846 |
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