Ata6824 And Atmega88: Dc Motor Control In High Temperature Environment

 The purpose of this document is to explain Atmel
®’s High Temperature H-bridge Motor
Control System. The demand for driver solutions in “under-the-hood” environments is
rapidly increasing, and in particular, the use of applications such as turbo chargers,
EGR, or AGR calls for new solutions.
Figure 1-1. ATA6824 and ATMEGA88   The system consists of two integrated circuits: the Microcontroller ATMEGA88 and the H-bridge
DC Motor Driver ATA6824.
The ATA6824 uses Gate drivers to drive H-bridge FETs voltage Regulator watchdog, and serial
IO Interface An integrated Charge Pump controls the NMOS FETs for low-side and high-side
switches. In addition, the Charge Pump voltage is capable of providing a low-drop inverse volt-
age protection. Therefore, only a NMOS FET in the source drain direction is necessary.
The ATA6824 switches the outputs off in the event of short circuits, voltage failures, and over-
temperature. Temperature prewarning and Charge Pump failures are also indicated. The
schematic has a current shunt, which CAN react at different current levels. The current signal is
prepared for the Microcontroller by an Amplifier
The ATMEGA88 generates the PWM speed signal to run various movement profiles as required
for the load.
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Ata6824 And Atmega88: Dc Motor Control In High Temperature Environment application circuits
Ata6824 And Atmega88:
Dc Motor Control In High Temperature 
Environment application circuits

Ata6824 And Atmega88: Dc Motor Control In High Temperature Environment application circuits
Ata6824 And Atmega88:
Dc Motor Control In High Temperature 
Environment application circuits


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