Page – 30/155 AF6ZP0CA – COMBIAC0 & ACE0 2uC – User Manual
Up to 1 Arms continuous (hold current) and max 2 A peak (pull current)
for a maximum duration of 200 ms.
Individual hardware for EV1 for driver shorted and driver open detection.
4 HORN output has not feedback hardware circuit. Any fault diagnosis is not
available but an self-protected driver is used
PWM Voltage controlled Outputs features
Up to 1 Arms continuous (hold current) and max 2 A peak (pull current)
for a maximum duration of 200 ms.
Individual hardware for driver shorted and driver open detection.
1 kHz PWM frequencies. It is applied to all PWM outputs.
Each PWM voltage controlled outputs can be modified with separate
software parameters.
PWM Current controlled Outputs features
Up to 1.5 Arms continuous (hold current) and max 1.7 A peak.
Individual hardware for driver shorted, driver open and coil open detection
Self-protected against overload condition.
Dithering feature thanks to a low amplitude current modulation at high
frequency (see paragraph 8.2.4).
Dithering is typically used when controlling proportional valves in order to
create microscopic movements in the valve to prevent it from “sticking”.
Successful dithering improves the valve response for small changes.
Dithering frequency is available in fixed steps:
20.8, 22.7, 25.0, 27.7, 31.2, 35.7, 41.6, 50.0, 62.5, 83.3.
Dithering current amplitude can be adjusted up to 13% of reference value.
Actual dithering amplitude is dependent on load inductance.
Protection
The auxiliary outputs are protected against inductive discharge with internal
freewheeling diodes on pin A3.
The auxiliary outputs are not protected against reverse polarity of the battery. A
way to avoid a failure caused by the polarity inversion is to activate the contactor
only when the voltage over the DC-bus capacitors has reached the accepted pre
charge level (see picture in section 3.2).
Built-in diagnostics:
- Overcurrent;
- Shorted driver;
- Open driver;
- Open coil (only for PWM current-controlled outputs).
-
Refer to section 10 for more details.
4 PWM shall only be used for inductive loads such as relays, contactors, motor
brakes or hydraulic valves
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