Power Drive Protection - Texas Instruments C28 Series Student Manual

Power Drive Protection

The PDPINTx is a safety feature that is provided for the safe operation of systems such as power
converters and motor drives. PDPINTx can be used to inform the monitoring program of motor
drive abnormalities such as overvoltage, over-current, and excessive temperature rise. If the
PDPINTx interrupt is unmasked, all PWM output pins will be put in the high-impedance state
immediately after the PDPINTx pin is driven low. An interrupt will also be generated.
Power Drive Protection
Power Drive Protection
♦
♦
Interrupt latency may not protect hardware when
Interrupt latency may not protect hardware when
responding to over current through ISR software
responding to over current through ISR software
♦
♦
PDPINTx
PDPINTx
to high
to high
C28x - Event Manager
has a fast, clock independent logic path
has a fast, clock independent logic path
- impedance the PWM output pins
- impedance the PWM output pins
DSP
DSP
DSP
CORE
CORE
CORE
Over
Over
Over
Current
Current
Current
PDPINTx
PDPINTx
Sensor
Sensor
Sensor
-
-
PDPINTA & PDPINTB
PDPINTA & PDPINTB
C28x
C28x
PDPINT PDPINT
PDPINT
flag flag
flag
clock synch.
clock synch.
clock synch.
Enable
Enable
Compare Units
P
P
W
W
M
M
O O
U U
T
T
P
P
U
U
T
T
S
S
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