LED2001PHR STMicroelectronics

LED2001 Datasheet 4 A monolithic step-down current source with synchronous rectification Features 3.0 V to 18 V operating input voltage range 850 kHz fixed switching frequency 100 mV typ. current sense voltage drop PWM dimming 7% output current accuracy Synchronous rectification 95 m HS/ 69 m LS typical R DS(on) Peak current mode architecture Embedded compensation network Ceramic output capacitor compliant Internal current limiting Thermal shutdown Applications High brightness LED driving Signage Halogen bulb replacement General lighting Product status link Description LED2001 The LED2001 is an 850 kHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as precise constant current source with an adjustable current capability up to 4 A DC. The embedded PWM dimming circuitry features LED brightness control. The regulated output current is set connecting a sensing resistor to the feedback pin. The embedded synchronous rectification and the 100 mV typical R voltage drop enhance the efficiency performance. SENSE The size of the overall application is minimized thanks to the high switching frequency and ceramic output capacitor compatibility. The device is fully protected against thermal overheating, overcurrent and output short-circuit. The LED2001 is available in VFQFPN 4x4 mm 8-lead package, and HSOP8. DS9524 - Rev 3 - August 2021 www.st.com For further information contact your local STMicroelectronics sales office.LED2001 Typical application circuit 1 Typical application circuit Figure 1. Typical application circuit LED2001 LL 6 7 VVIINN VIN SW SW 1 VIN A 2 3 DDIIMM DIM FB PGND EP AGND CCIINN CFLCFLTT RRSS CCOOUUTT 8 9 4 GGNNDD AM12892v1 DS9524 - Rev 3 page 2/40