In led strip light applications, sometimes the output of the led controller may not be enough to drive all your led strips. In this case, you can use a constant voltage power amplifier to amplify the controller's output to ensure that enough power is delivered to all the led strips. And the led light strips are all under the same control system.
These Ltech PWM LED Strip Light Constant Voltage Power Amplifiers with 1CH, 3CH, or 4CH color output for different led types.