Vansco VMM3120, Руководство пользователя

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30 VMM3120
Outputs
The following diagram shows the configuration for high-side outputs:
Internal to product
Application
Load
High-Side Driver
Battery voltage
Strobed Open
Load Detect
Figure 14: High side output configuration
4.1.3. High-Side Output Installation Connections
When connecting high-side outputs, note that

High-side outputs are connected to an internal bus bar, which is connected to
the battery. The bus bar is also connected to logic power (VBATT), and both
share the same connector pins.

High-side outputs can provide switched battery power to any load type in a
vehicle.

High-side outputs can source up to 2.5 A max.

High-side outputs have internal flyback diodes, which are needed when
driving inductive loads (the flyback diodes absorb electrical energy when the
load is turned off).
Inductive loads will create an average current flow that moves out of the high-side
output. When the output is on, the current flows through the output driver, and
when the output is off, the current flows through the flyback diode. A duty cycle
of 50% will produce the worst case average current flow through these two
devices.
Note: If large inductive loads are used, and the high-side output is providing a
continuous PWM signal, the PWM peak current must not be greater than the
specified continuous current for the output (in continuous mode, the average
current flow through the diode at 50% duty cycle is approximately equal to ½
the peak current).