Transports electrons between flavodoxin or ferredoxin and NADPH. H(+) + NADP(+) + 2 reduced [2Fe-2S]-[ferredoxin] = NADPH + 2 oxidized [2Fe-2S]-[ferredoxin] NADP(+) + reduced [flavodoxin] = 2 H(+) + NADPH + oxidized [flavodoxin] Belongs to the ferredoxin--NADP reductase type 1 family.