ATA6824-DK Atmel, ATA6824-DK Datasheet - Page 10

• Manufacturer Part Number: ATA6824-DK
• Description: BOARD EVALUATION FOR ATA6824
• Manufacturer: Atmel

Specifications of ATA6824-DK

• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATA6824
• Primary Attributes: Brush DC Motors, 5V, Watchdog, Voltage Regulator
• Secondary Attributes: Short-Circuit, Thermal & Undervoltage Protection
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

5.5
5.5.1
5.5.2
Table 5-2.
10
Note:
PBAT_UV
X
X
X
X
X
1
Control Inputs DIR and PWM
PBAT_UV: Undervoltage PBAT pin
SC: Short circuit drain source monitoring
VBAT_UV: Undervoltage of VBAT pin
VBAT_OV: Overvoltage of VBAT pin
CPOK: Charge pump OK
OT: Overtemperature warning
X represents: don’t care – no effect)
Atmel ATA6824
Pin DIR
Pin PWM
SC
Status of the Diagnostic Outputs
X
X
X
X
X
1
VBAT_UV VBAT_OV
X
X
X
Device Status
1
0
0
Logical input to control the direction of the external motor to be controlled by the IC. An inter-
nal pull-down resistor is included.
Logical input for PWM information delivered by external microcontroller. Duty cycle and fre-
quency at this pin are passed through to the H-bridge. An internal pull-down resistor is
included.
Table 5-1.
The internal signal ON is high when
In case of a short circuit, the appropriate transistor is switched off after a blanking time of t
In order to avoid cross current through the bridge, a cross conduction timer is implemented. Its
time constant is programmable by means of an RC combination.
• At least one valid WD trigger has been accepted
• Neither short circuit nor PBAT undervoltage detected
• V
• The charge pump has reached its minimum voltage
• The device temperature is not above shutdown threshold
ON
0
1
1
BAT
Control Inputs
X
X
1
X
0
0
is inside the specified range (V
DIR
X
0
1
Status of the IC Depending on Control Inputs and Detected Failures
CPOK
X
X
X
PWM
PWM
PWM
0
1
1
X
Driver Stage for External Power MOS
/PWM
OT
OFF
X
X
X
X
X
ON
1
H1
– Status of the diagnostic outputs depends on device status
DG1
PWM
THUV
OFF
OFF
–
0
0
0
1
1
L1
Diagnostic Outputs
V
DG2
VBAT
/PWM
OFF
–
1
1
1
0
0
ON
H2
V
THOV
DG3
PWM
OFF
OFF
1
–
–
–
–
–
L2
)
Comments
Overtemperature warning
Charge pump failure
Overvoltage VBAT
Undervoltage VBAT
Short circuit
Undervoltage PBAT
DG1, DG2 fault or RESET
Motor PWM forward
Motor PWM reverse
Comments
4931L–AUTO–02/11
SC
.