LED2001PHR Datasheet, PDF (1/42 Pages) STMicroelectronics – 4 A monolithic step-down current source with synchronous rectification

LED2001
4 A monolithic step-down current source with synchronous
rectification
Datasheet - production data
VFQFPN8 4x4
HSOP8
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 R_DS(on)
• Peak current mode architecture
• Embedded compensation network
• Internal current limiting
• Ceramic output capacitor compliant
• Thermal shutdown
Applications
• High brightness LED driving
• Halogen bulb replacement
• General lighting
• Signage
Description
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_SENSE
voltage 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
LED2001 is available in VFQFPN 4 mm x 4 mm
8-lead package, and HSOP8.
Figure 1. Typical application circuit
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May 2013
This is information on a product in full production.
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