ATA6823-DK Atmel, ATA6823-DK Datasheet - Page 14

• Manufacturer Part Number: ATA6823-DK
• Description: BOARD EVALUATION FOR ATA6823
• Manufacturer: Atmel
• Type: PWM Controllersr

Specifications of ATA6823-DK

• Main Purpose: Power Management, Motor Control
• Embedded: No
• Utilized Ic / Part: ATA6823
• Primary Attributes: Brush DC Motors, 8 ~ 18V, LIN Interface, Watchdog, 5V Regulator
• Secondary Attributes: Cross Conduction, Under/Over Voltage, Short Circuit, & Temperature Protection
• Input Voltage: 8 V to 18 V
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: ATA6823

3.12
14
Short Circuit Detection
Atmel ATA6823
To detect a short in H-bridge circuitry, internal comparators detect the voltage difference
between source and drain of the external power NMOS. If the transistors are switched ON and
the source-drain voltage difference is higher than the value V
> t
immediately. The diagnostic pin DG1 will be set to “H”. With the next transition on pin PWM,
the bit will be cleared and the corresponding drivers, depending on the DIR pin, will be
switched on again.
There is a PBAT supervision block implemented to detect the possible voltage drop on PBAT
during a short circuit. If the voltage at PBAT falls under V
> t
as above.
SC
SC
(typically 10µs) the signal SC (short circuit) will be set and the drivers will be switched off
the drivers will be switched off immediately and DG1 will be set to “H”. It will be cleared
SCPB
SC
(5.6V with tolerances) for a time
(4V with tolerances) for a time
4856K–AUTO–01/11