GP-3001 LED CONTROLLER
The GP-3001 Power/Dimmer module combines a DC-to-DC power inverter, an error loop filter/amplifier, a pulse-width modulation dimmer control circuit for power supply and control of medium density LED backlight strings. The GP-3001 maintains a closely regulated constant-current output by means of a firmware-driven current sampling circuit. This circuit automatically adjusts the pulse-width modulation duty cycle in response to changes in load, such as those due to temperature variation. In addition, the pulse-width modulation can be controlled via an external manual potentiometer for normal backlight dimming control. The automatic regulation and manual dimming work together to maintain a constant output.
