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STMicroelectronics - 4A monolithic step-down current source

Numéro de référence LED2001
Description 4A monolithic step-down current source
Fabricant STMicroelectronics 
Logo STMicroelectronics 





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LED2001 fiche technique
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 RDS(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 RSENSE
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.
DocID024346 Rev 1
1/42
www.st.com
42

PagesPages 30
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