ATA6844-DK Atmel, ATA6844-DK Datasheet - Page 9

• Manufacturer Part Number: ATA6844-DK
• Description: Power Management IC Development Tools BLDC Motor Drvr Brd
• Manufacturer: Atmel
• Type: Motor / Motion Controllers & Driversr

Specifications of ATA6844-DK

• Rohs: yes
• Product: Development Kits
• Tool Is For Evaluation Of: ATA6844, ATmega32M1, ATmega32U2
• Input Voltage: 3.3 V, 5 V, 12 V
• Description/function: Atmel ATA6844-DK BLDC Motor Control Kit
• Interface Type: LIN, UART, USB
• Factory Pack Quantity: 1

7. High Ambient Temperature
8. The Application Board
8.1
9236A–AUTO–08/11
Power Board Features
The Atmel
dard for automotive grade automotive temperature range. This approval level allows ambient
operating temperatures of up to 150°C.
The maximum junction temperature of the Atmel ATA6844 is 200°C. Hence, the available
thermal gap for power dissipation in 150°C ambient temperature applications is about 50K.
Basically there are three heat sources in the Atmel ATA6844: the VCC voltage regulator, the
charge pump and the remaining internal operating circuitry.
To calculate thermal balance please refer to the dedicated application note:
“Estimated Junction Temperature Rise Due to Power Dissipation during Operation.”
The application basis board provides the following features:
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Atmel ATA6844 QFN7x7 - 48
Six External MOSFETs SQD50N04 with Current of up to 50A DC
Low Drop Reverse Voltage Protection with SQD50N04
Button SW1 for System Wake-up
LED Power to Indicate Supply Voltage Present
LED NCOAST to Indicate Active Coast Function
Back EMF Sensor Feedback
Hall Sensor Feedback
LIN Transceiver
SCREF Input
Two Selectable Short Circuit Input Threshold Level Inputs
Dimensions: 89mm
– 6 Gate Driver Outputs to Operate N-channel MOSFETs
– VCC Regulator 5V or 3.3V Operation, Window Watchdog, LIN Transceiver up to LIN 2.1
– Filter Network to Operate with Enclosed Type FL42BLS01 BLDC Motor
– Back EMF is Supported by Atmel ATmega32M1 Firmware
– Optional, Not Supported by Firmware
– Designed for Integrated Hall Sensors with 5V Digital Supply
– The Atmel ATA6843/ATA6844 Can Generate 5V as well as 3.3V Digital Output Voltage.
– Board is Configured as a LIN Slave, without Pull-up and Diode for Master Mode
– Access to the Pin via X2 Connector
– Via SCREF Adjustment Potentiometer or
– Microcontroller Output
Compliant
Note: Integrated Hall Sensors Usually Work on a 5V Supply Only, BLDC Movement at 3.3V
Is Not Possible
Configuration
®
ATmega32M1 is qualified for use in compliance with the AEC-Q100 Grade 0 stan-
89mm
Atmel ATA6843/ATA6844
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