This post is intended for me to document all of the modding and testing I have been doing on various buck and boost drivers I have been playing with lately. For now I am only posting the raw data and some comments on the Kaidomain boost drivers, I will update the OP with more as results come in and I get time.
Kaidomain H1-A 20mm “6V” Boost Driver
This driver is intended to run an XHP50.2 at approximately 3A output. It is moddable to triple emitter voltages by changing resistor R1 to a higher value, I have used 75K. The sense resistor can be changed to modify output current. Based on the TPS61088 chipset, power output is limited by a 10A input current limit. Designed only for 1S input, LVP will start to reduce current to maintain a 3.0V input, and cuts off once it can no longer maintain low mode. Test data below
Kaidomain H2-C 22mm “12V” Boost driver
This driver is intended to drive an XHP35 emitter with 1.5A, stepping down to 1.0A after 60s. This step down is gradual over about 30s. Input to the driver can be either 1S or 2S, with much greater efficiency and power output using 2S. Output current can be modified by changing the sense resistor. Based on an unknown external switch boost controller. Test data below, data taken before step down unless otherwise noted.
Kaidomain KX70 32mm “6V” Boost driver
This driver is intended to drive an XHP70 to about 4A using a 1S input. It is again using the TPS61088 boost controller, which has the 10A input limit. It can be modded by changing the sense resistor to increase current, and likely increase the voltage by changing R1 again, but I have not tested this. This driver is unfortunately not fully regulated, the output current changes based on the input voltage. This happens in all modes. Low mode is also not very low at all. It does seem to have some sort of protection for the boost IC that won’t allow it to draw more than 10A input, and also temperature protection where it will cut off if the driver gets too hot. Heat is not a big concern with this driver however, as it is much larger and has much more mass to help soak up and dissipate the heat. The negative contact ring also has a large brass washer installed which helps dissipate heat into the host. Low voltage protection appears to kick in around 2.8V, at which point the light steps to low mode and flashes. Test data is below.