Got this one too, its quite similiar in shape with previous mercedes benz led projector.
Let’s go with the left one firts.
Very tiny heatsink since this one is active cooling, molded as one with fan. Made by AL
Come as pair, but i did not know from what cars type.
Let’s start teardown with the right one first.
This one is came from Yamaha NMAX 155 which is i believe will be same as NMAX 125 version for European market
As you can see, those BIG resistor act as “LED Driver” which is ridiculous. Using 3 piece Osram emitter, “Oslon Black Flat” to be more specific. You can search for complete datasheet using those keyword.
Made by Koito
One driver with 2 input / 2 output for Low Beam (Projector) and High Beam (Reflektor)
Mirrored PCB layout
Here is the output 15V @ 1.2A
Using a Buck-Boost Topology, since difference between input voltage and output voltage gap is small
Thanks to Wanto Bekas Loak for lend this LED Driver
Here few led driver output current test (copyed from my post at hidplanet)
Honda Accord led driver output 33VDC @ 0.64A which is around 21 Watt
Honda Jazz led driver output 13.4VDC @ 0.92A which is around 12 Watt
Lexus RX450 led driver output 27VDC @ 0.85A which is around 23 Watt
Thanks to Entu Watanabe for lend this LED Driver
This is a boost led driver, which mean output voltage > input voltage
I measure 1A output with 30-33VDC constant voltage load
Thanks to Entu Watanabe for lend this LED Driver
Nichia Emitter
Driver Picture
This driver is feeding those Nichia emitter 13.3VDC @ 1.7A, which mean needed a buck-boost or sepic led driver since the input voltage will be near (slightly lower/higher) than output voltage.
Since this LED using a force convection (fan) for cooling system it had one unique feature is when the fan is not attached aka broken, this driver will reduce the output to 11.8VDC @ 0.5A only after 2 minutes to prevent overheat/burn the emitter. Its clearly that those fan is giving a “signal/feedback” to driver.
I try to use wave generator to simulated those fan pulse out to the driver,I started with 20Hz – 300Hz with 10Hz step. To get the driver back to normal with 80Hz-300Hz, and i assume above 75Hz square wave output enough to “deceive” the driver.
Thanks to Entu Watanabe for lend this LED Driver
torega 