Product/Service

Digital Dimming Module

Source: StacoSwitch
The Digital Dimming Module, models DDM111 and DDM111A (herein referred to as "A" version) feature power adjustment through a proprietary pulse width modulation technique rather than by adjusting load voltage
Digital Dimming Module Introduction

The Digital Dimming Module, models DDM111 and DDM111A (herein referred to as "A" version) feature power adjustment through a proprietary pulse width modulation technique rather than by adjusting load voltage. This makes the DDM an ideal device to adjust the brightness of LEDs. Typical dimmers simply change supply voltage to adjust brightness. However, if supply voltage drops below the LED cutoff voltage, light emission immediately ceases. Also, cutoff voltage differs with different colored LEDs. The DDM offers reliable, consistent dimming for all types of LEDs and lamps drawing up to 10 amps at 30 volts.

LED or lamp brightness is controlled by logic inputs to the DDM. These can be through manual control with switches or automatically using computer control. A maximum of 16 output power levels are possible ranging from full on to full off. Brightness can be stepped up or down through the 16 levels by using the /UP or /DOWN inputs. Brightness can also be switched to full off or full on using the /BLANK and /OVERRIDE inputs. This full on feature can serve as a Lamp Test. The DDM can operate directly from +5 volts dc or from +7 to 30 Volts dc. This device includes a +5 Volt regulator to reduce input voltages of +7 to 30 Volts to the +5 Volts the logic within the unit requires. All power and I/O are accessed through one standard 25-pin male D-subminiature connector which makes connections fast and simple.

In order to function as either a source or sink of output power, the DDM includes a Boost Regulator to provide proper bias to the output stage. The output stage monitors load current and provides a FAULT output that turns on if output current exceeds the maximum allowable.

The DDM is ideal for applications such as bulk annunciator panel dimming, or as a single search lamp brightness control. It can also be used where PWM is needed to regulate power to a load. The DDM is used in Process Control and Industrial Control, Power Stations, and Military applications.

Models DDM111 and the "A" version are identical except that the "A" version has a smooth transition from full on to full off.

StacoSwitch, 1139 Baker St., Costa Mesa, CA 92626. Tel: 949-549-3041; Fax: 949-549-0930.