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| LM3557 Datasheet, PDF (6/11 Pages) National Semiconductor (TI) – Step-Up Converter for White LED Applications | |||
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Typical Performance Characteristics ( Circuit in Figure 1: L = DO1608C-223, D = SS16, and LED =
LWT67C. Efficiency: η = POUT/PIN = [(VOUT â VFb) * IOUT]/[VIN * IIN]. TA= 25ËC, unless otherwise stated). (Continued)
En PIN CURRENT vs En PIN VOLTAGE
CURRENT LIMIT vs TEMPERATURE
20131608
OVP PIN CURRENT vs TEMPERATURE
20131609
RDS(ON) (Figure 2: N1) vs TEMPERATURE
20131610
RSw2(Figure 2: N2) vs TEMPERATURE
20131611
ENABLE THRESHOLD vs TEMPERATURE
20131612
Application Information
www.national.com
6
20131613
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