Pr4403 Led Driver For Mac
PREMA designs and produces the ICs in their own fab located in Mainz, Germany, LED solar lamps operate with automatic LED control depending on the ambient light level. The battery is charged by solar cells. Normally this requires several components like Schottky diodes, capacitors, resistors, two or three rechargeable battery cells and a photo resistor.
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In contrast to this standard solution the PR4403 saves several components, as it is able to drive the current for the white LED out of a single rechargeable battery cell. Also the expensive photo resistor is no longer needed. A supply voltage of down to 0.9V is sufficient for the IC to drive a current of up to 40mA independent of the input voltage. The value of the external inductor defines the LED current. Instead of the photo resistor, the solar cell is directly connected to the IC for daylight level detection, and an optional resistor sets the light threshold. Depending on the voltage at this connection, the integrated step-up converter is switched on or off.
LED Driver PR4403 0.9 V Boost Driver PR4403 for White LEDs in Solar Lamps The PR4403 is a single cell step-up converter for white LEDs operating from a single. LED Driver PR4401 / PR4402 0.9 V Boost Driver for White LEDs Requires Only One External Component The PR4401 and PR4402* are single cell step-up.
During daytime the driver is shut-down and the solar cell charges the battery via the external Schottky diode. Mitsubishi cp d70dw driver for mac. With decreasing ambient light the voltage at the solar cell drops, the IC is activated and drives the LED current out of the battery cell. Deep discharge of the battery cell is prevented as the PR4403 shuts off the driver when the supply voltage drops to less than 850mV. Therefore PREMA´s PR4403 saves cost for LED solar lamps as it reduces the number of components. Applications for the PR4403 are solar garden lamps as well as house number lights, decoration lights and road markers powered by solar cells. Samples in SO8 package are available upon request.
You can download the data sheet from our web site.
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Pr4403 Led Driver For Macbook
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