Key words:
LED drive, MAX16841, MAXIM, offline
Maxim Integrated Products, Inc (NASDAQ: MXIM) Purizes off-line LED drive MAX16841, using the frontier (three-way two-way thyristor) and the rear (transistor) dimmer to achieve a flashless dimming from the maximum light to zero . Fixed frequency control Optimizes the efficiency of working in low pressure and high voltage AC grids. The MAX16841 uses 90VAC to 265VAC input range for universal solutions for Japan, China, USA and European dimmer. The drive allows direct replacement incandescent lamps and halogen lamps to avoid compatibility issues when pre-installed dimmers. The MAX16841 does not require the electrolytic capacitance to work, thereby extending the life of the LED lamp. Eliminating these capacitors also saves space and fees. The LED driver is ideal for the upgrade of dimming LED lamps and general LED lighting in industrial, commercial and residential lighting applications.
Improvement of dimming problems in applications
The dimmer is increased or lowered by increasing or decreasing the power of the light. Now, the two most common regulation methods are the frontier (triple-side two-way thyristor) and the subsequent (transistor) dimmer. Both types of dimmers regulate the power of the light by cutting a portion of the alternating waveform. As the name suggests, the front edge of the wavpet is cut into the front edge of the waveform is cut, and the portion of the waveform before the waveform is cut out. The front elevator is suitable for resistivity or inductive load, while the rear is suitable for resistivity or capacitive loads along the dimmer.
In order to directly upgrade the traditional lighting, the LED light must be compatible with the frontier and rear elevator. These dimmer design are usually suitable for traditional halogen lamps and incandescent lamp resistive loads. However, the LED driver is completely non-linear, not too suitable for the pure resistive load of the dimmer. Therefore, when the LED is connected to an existing electrical facility with a dimmer, the LED lamp usually flicks, and often darkened, in some cases even do not light.
The MAX16841 uses a patented technology to control the input current of the light, which solves this problem. The drive is correctly corrected input current to ensure that the flash is not flashing in most electronic transformers and dimmer. Now, the LED lamp designer can design a transformed product that directly replaces a halogen lamp and incandescent lamps that can be dimmade to zero-powered.
Flexible design optimization efficiency under any working conditions
The MAX16841 can be designed to isolate (fly) and non-isolated (step-down) configurations, which are suitable for high-voltage AC grids (220Vac to 230VAC), and is also suitable for low voltage AC grids (100Vac to 120VAC). The fixed frequency control architecture uses the optimal conduction mode (DCM or CCM) based on the input voltage, thereby increasing efficiency. Due to the switch, the regulator itself ensures sufficient maintenance current, so the MAX16841 current control technology does not need a shunt to maintain the dimmer current, thereby increasing dimming efficiency.
General input expand the application area, shorten design time and reduce cost
The MAX16841 can be configured to achieve unblocking dimming in the world's update applications worldwide. The MAX16841 can also reduce inventory and design costs due to the need for a separate LED driver.
Extend the life of the light, save space
The MAX16841 can be designed to not use electrolytic capacitors. Electrolytic capacitance is usually the most prone to failure of the driver circuit, so extending the life of the LED lamp. If the electrolytic capacitors are used in the designed design, the MAX16841 can even continue normal illumination when these capacitors fails.
The province's demodulatory capacitance can also reduce the cost of the drive, reduce the volume, suitable for small volume applications. Be
More details
The MAX16841 works at temperatures in -40 ° C to + 125 ° C. 8-pin, SOIC package.
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