Is it a bit too risky? (single MC-E 4 dice wired series)
Fully charged voltage 12S-NiMH on the pack will be 16.8v for a few moments after power is applied, which will give 4.2 Vf per LED for a few seconds after the power goes on .Maybe in excess of 1500mA.
The voltage will quickly drop to around 15v say Vf 3.75 which would give around 1000mA for a further 10 minutes or so.
Voltage levels off for much of the rest of the discharge at 14.6 - 14.2 and spends most of it's time in this range. This should be 3.6V giving around 750mA.
I would guess some decent heatsinking is in order. It's just the first part of the dicharge cycle i'm worried about. Would a zener (decent wattage)across the load be neccesary?
any thoughts appreciated.
Marco.
Fully charged voltage 12S-NiMH on the pack will be 16.8v for a few moments after power is applied, which will give 4.2 Vf per LED for a few seconds after the power goes on .Maybe in excess of 1500mA.
The voltage will quickly drop to around 15v say Vf 3.75 which would give around 1000mA for a further 10 minutes or so.
Voltage levels off for much of the rest of the discharge at 14.6 - 14.2 and spends most of it's time in this range. This should be 3.6V giving around 750mA.
I would guess some decent heatsinking is in order. It's just the first part of the dicharge cycle i'm worried about. Would a zener (decent wattage)across the load be neccesary?
any thoughts appreciated.
Marco.
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