Half Bridge Operation; Full Bridge Operation - Maretron MPOWER CLMD16 User Manual

16channel dc load controller module

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Please note that the maximum current rating when multiple breakers are paralleled is typically,

180% of the single channel rating. (Example: 18A maximum for two 10A breakers in parallel).

• When two breakers are configured in parallel, the lowest-numbered breaker controls

the pair. For example, if breakers #1 and #2 are configured to operate in parallel,

commands that control breaker #1 will control the state of both paralleled breakers, and

commands to breaker #2 will be ignored.

• Please note that dimming operation is not supported on breakers that have

been configured to operate in parallel with other breakers.

When breakers are configured for parallel output, the lowest breaker number of the pair will set the

trip current for both breakers. The trip current will need to be configured to 50% of the desired trip

current value. For example, if you parallel breaker #1 and breaker #2 and wish to use them to

supply power to a load rated at 22 Amps, breaker #1 will need to be set to 11 Amps. Breaker #2 will

become visible to show the same trip current value as breaker #1 of 11 Amps thus the trip current

for the paralleled breakers will be 22 Amps.

12 Amp Breakers #1, #2, #11, and #12 can be configured as half-bridge breakers. In the OFF state,

they can connect the load to ground as opposed to becoming high impedance. When in half-bridge

mode, the channels can be used to control electric motors and be used to perform braking on the

motors by connecting the motor lead to ground when the load channel is turned off.

The PWM frequency in half-bridge operation is fixed at 20 kHz.

In half-bridge mode, Breakers #1 and #2 support PWM operation with a duty cycle of 5% to 90%,

programmable in 1% increments. Breakers #11 and #12 do not support PWM operation in half-

bridge mode.

12-amp breakers 1 and 2, and 11 and 12, can be configured to offer polarity reversing capability

using the two half bridge circuits together. Loads such as actuators are a great application for this

circuit type. The full bridge breakers support PWM operation with a duty cycle of 10% to 90%,

programmable in 1% increments. The PWM frequency in continuous mode is 20 kHz. See: Figure

10 for Full-Bridge concept pertaining to CLMD16 and its benefits VS an analog H-Bridge requiring

the use of 4 switches.

Half Bridge Operation

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