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STMicroelectronics LED2000

3 A monolithic step-down current source with synchronous rectification

Overview

TopologyBuck Converter
Input voltage3-18 V
Switching frequency700-1000 kHz
Output 13 A
IC revisionD023432 Rev 4

Description

3 A monolithic step-down current source with synchronous rectification.The LED2000 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 3 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 RSENSEvoltage drop enhance the efficiency performance. 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 LED2000 is available in VFQFPN 4 mm x 4 mm 8-lead, and standard SO8 package.

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 mΩ HS / 69 mΩ LS typical RDS(on)◾Peak current mode architecture◾Embedded compensation network◾Internal current limiting◾Ceramic output capacitor compliant◾Thermal shutdown

Typical applications

  • Halogen bulb replacement/ Signage/ General lighting/ High brightness LED driving

Products

Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Samples
744311100SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 1 15 0.78 19 4.6 85 Superflux SMT
744311150SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 1.5 11 1.12 14 6.6 72 Superflux SMT
744311220SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 2.2 9 1.75 13 11.4 52 Superflux SMT
744311330SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 3.3 6.5 2.75 11 17.2 43 Superflux SMT
744311470SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 4.7 6 3.5 7 19.5 33 Superflux SMT
744314490SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 4.9 6.5 3.4 6.5 14.5 56 Superflux SMT
744314650SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 6.5 6 4.5 6 21.5 50 Superflux SMT
744314760SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 7.6 4.2 6 4.8 28.2 48 Superflux SMT
744314850SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 8.5 4 6.8 4.5 30.5 44 Superflux SMT
744314101SPEC
9 files WE-HCI SMT Flat Wire High Current Inductor 10 3.5 7.5 4 33 40 Superflux SMT
Samples
Order Code Data­sheet Downloads Product seriesL
(µH)
IR
(A)
LR
(µH)
ISAT
(A)
RDC
(mΩ)
fres
(MHz)
MaterialVersion Samples