Product Summary
The LX1992 is a compact high efficiency step-up boost controller for driving white or color LEDs in backlight or frontlight systems and offers designers maximum flexibility with respect to efficiency and cost. The LX1992 features a pseudohysteretic pulse frequency modulation topology and uses an external N Channel MOSFET. Further, the LX1992 features control circuitry that is optimized for portable systems.
Parametrics
LX1992 absolute maximum ratings: (1)Supply Voltage (VIN): -0.3V to 7.0V; (2)Feedback Input Voltage (VFB): -0.3V to VIN + 0.3V; (3)Shutdown Input Voltage (VSHDN): -0.3V to VIN + 0.3V; (4)Analog Adjust Input Voltage (VADJ): -0.3V to VIN + 0.3V; (5)Source Input Current (ISRC): 0.80 ARMS; (6)Operating Junction Temperature: 150℃; (7)Storage Temperature Range: -65℃ to 150℃; (8)Lead Temperature (Soldering 180 seconds): 235℃; (9)Peak Package Solder Reflow Temp. (40 second max. exposure): 260℃.
Features
LX1992 features:(1)> 90% Efficiency; (2)80μA Typical Quiescent Supply Current; (3)Externally Programmable Peak Inductor Current Limit For Maximum Efficiency; (4)Logic Controlled Shutdown; (5)< 1μA Shutdown Current; (6)Dynamic Output Current Adjustment Via Analog Reference Or Direct PWM Input; (7)8-Pin MSOP Package or 8-Pin MLP.
Diagrams
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![]() LX1992CLM |
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![]() IC LED DRIVR WT/CLR BCKLGT 8-MLP |
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