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LED5000 Datasheet(PDF) 1 Page - STMicroelectronics |
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LED5000 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 52 page  This is information on a product in full production. January 2013 Doc ID 023951 Rev 1 1/51 51 LED5000 3 A monolithic step-down current source with dimming capability Datasheet − production data Features ■ 5.5 V to 48 V operating input voltage range ■ 850 kHz fixed switching frequency ■ 200 mV typ. current sense voltage drop ■ buck / buck-boost / floating boost topologies ■ PWM dimming ■ ±3% output current accuracy over temperature ■ 200 mW typical RDSON ■ Peak current mode architecture ■ Short-circuit protection ■ Compliant with ceramic output capacitors ■ Inhibit for zero current consumption ■ Thermal shutdown Applications ■ High brightness LED driving ■ Street lighting ■ Signage ■ Halogen bulb replacement ■ General lighting Description The LED5000 is an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as a precise constant current source with an adjustable current capability up to 3 A DC. The embedded PWM dimming circuitry features LED brightness control. The regulated output current level is set by connecting a sensing resistor to the feedback pin. The 200 mV typical RSENSE voltage drop enhances performance in terms of efficiency. The size of the overall application is minimized thanks to the high switching frequency and its compatibility with ceramic output capacitors. The device is fully protected against overheating, overcurrent and output short-circuit. The LED5000 is available in an HSOP8 package. Figure 1. Typical application circuit HPSO8 CIN CFLT VIN GND DIM RS COUT U1 LED5000 BOOT 1 DIM 2 INH 3 COMP 4 GND 6 SW 8 VIN 7 FB 5 L AM13485v1 www.st.com |
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