LM3421_09 Datasheet, PDF (7/24 Pages) National Semiconductor (TI) – N-Channel Controllers for Constant Current LED Drivers

Typical Performance Characteristics Taken from the standard evaluation board
Boost Efficiency vs. Input Voltage
(6 White LEDs, ~20V at 1A)
Buck/Boost Efficiency vs. Input Voltage
(6 White LEDs, ~20V at 1A)
30067323
Boost Efficiency vs. Input Voltage
(11 White LEDs, ~46V at 1A)
30067322
Average LED Current vs. PWM DIM Duty Cycle
(V_IN = 12V, 6 White LEDs, ~20V at 1A)
30067321
LED Current vs. Ambient Temperature
(V_IN = 12V, Nominal LED Current Set at 1A)
30067318
LED Current vs. Input Voltage
(Boost, 6 White LEDs, ~20V at 1A)
30067319
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