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KD BD8P 17mm Single li-ion Buck 2.9a Driver Board (2.7V-4.2V) - 1 piece


Our Price: $5.25 free shipping
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Features:
- DC 2.7-4.2V input
- MAX 2.9Amp ouptut
- DC-to-DC buck current regulated circuit (Higher efficiency than 7135 solution)
- Current regulation for all output mode (no PWM flicks even at low mode)
- Eight programmable outputs
- Voltage warning at 3.0V (Light will drop to Lo mode and flashing)
- 1.6mm double sided PCB, 17mm diameter, 4.8mm height w/o spring, copper spring positive



 Battery types: 1xLi-ion or 3xNiMH/alkaline
 LED support: XM-L, P7, SST50, etc. (3*XP-E, 2*XP-G wired in parrellel)
 Last mode memory: By soldering the bridge at "D", you toggle this setting (default off - disconnected).
 Programmable outputs: By soldering the bridge at "A, B, C", you get different output modes. (see product image for detail output and connections)



 * GND (the outer ring - either side) must be attached to metal with thermal eproxy to heatsink. Optimal heatsink ensure constant regulation without thermal protection kicking -in (i.e. reducing output).
 ** Do not short circuit, do not reverse battery polarity, warranty does not cover user damage.



Group of Modes:
A: Lo(10%) > Hi(100%)
B: Lo(5%) > Med(30%) > Hi(100%)
C: Lo(5%) > Hi(100%) > Strobe(10Hz)
D: Lo(5%) > Med(30%) > Hi(100%) > Strobe(10Hz) > SOS


Package Content:
1 x Driver Board


 
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