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This
output is a PWM (pulse width modulated) signal with a configured duty cycle and
variable frequency controlled by the design logic.
The PWM frequency is variable
from 50% to 200% of a configured base frequency. The “percentage” value is provided by the
design logic. The PWM frequency at the
output pin is equal
to the BaseFrequency*PercentageValue/100. (Example: BaseFrequency
= 1000Hz, PercentageValue = 150, PWM frequency = 1500
Hz)
This output is a low side
switch, which depending on the configuration, can source 12V and from 5A.
Hardware Interface: The PSoC pin drives the output directly or through a high voltage and
current rated MOSFET. An optional diode protects the MOSFET when used with
inductive loads.
Software Interface: The PWM frequency is controlled with an 8-bit unsigned value between 50
and 200. This value is the percentage of
the configured base frequency that will yield the desired PWM output frequency. (Example: 50 results in a generated PWM
frequency of 0.50*BaseFrequency, 200 results in a
generated PWM frequency of 2.0*BaseFrequency)
User-Configurable
properties.
· DutyCycle: the duty cycle value
determines the portion of the signal period that the output is high. The duty cycle is expressed as a percentage –
from 0 to 100%. (Example: 45% is 45)
· BaseFrequency: this is the output frequency
of the PWM when the associated percentage value is equal to 100. The output frequency of the PWM is calculated
using this property and the percentage value determined by the driver transfer
function.
Non-Configurable
properties.
· VA Mode: 12V 5A Low Side
· Polarity: Positive
· Voltage: 14V (max)
·
Current: 5A
(max)