CCpilot VA
1.2
Technical Manual
2017-03-13
www.maximatecc.com
25
5.9.
High-side PWM outputs
CCpilot VA
has two self-protected high-side PWM outputs for switching various external loads such as
buzzers, relays, solenoids, lamps or other resistive or inductive loads.
The high-side output drivers are powered from the main supply voltage through internal over-voltage
protection that limits the output voltage to 32 V
DC
(typ) in case of supply voltage transients. Each
output handle load currents up to 1.0 A (typ) and are current-limited at 1.2 A (typ) per channel.
Each output provide diagnostics/fault-detection for both ON- and OFF-state according to below:
OFF-state
ON-state
Open load
-
Short to battery
-
-
Overload or
short to ground
-
Over-
temperature
To ensure long-term reliability, the fault-detections flags are continuously monitored and each output
is automatically switched OFF in case its fault flag is triggered in ON state. An output switched OFF by
a fault condition must be reenabled by the user or user application.
Observe that high continuous load at the outputs adds self-heating of the device. At high ambient
temperatures, this may lead to outputs automatically switching off because of thermal protection.
Outputs can be reenabled by the user (or user application) once the driver IC temperature has
decreased below its threshold. If output over-temperature shutdown occurs, it is recommended to
improve air ventilation around the device and if possible reduce the amount of output load.
Output on/off control as well as PWM frequency, duty-cycle and fault monitoring is handled by a co-
processor and controlled though software API.
See
chapter 7.1
for electrical characteristics such as channel resistance, timing, current limit and fault-
detection details.