VAS1211

The VAS1211 is a step-down constant-current
high-brightness LED (HBLED) drivers provide a
cost-effective solution for exterior lighting,
architectural and ambient lighting, LED bulbs
such as MR16 and other LED illumination
applications.
The device operates from a 7V to 60V input
range. The device drivers an external NMOS and
can provide an externally adjustable output
current up to 5A.
The device is well suited for applications
requiring a wide input voltage range. The
high-side current-sensing and an integrated
current setting circuitry minimize the number of
external components while delivering an LED
current with ±5% accuracy. A novel control
algorithm ensures excellent input-supply
rejection and fast response during load transients
and PWM dimming. The devices operate up to
1MHz switching frequency, thus allowing for
small component size.
The device operate over the -40°C to +85°C
temperature range and available in SOT23-6L.

Features
 Wide supply range High-Side Current Sense
 PWM Dimming
 20kHz Maximum PWM Dimming Frequency
 No Compensation Capacitor
 Up to 500kHz Switching Frequency
 ±5% LED Current Accuracy
 Adjustable Constant LED Current
 -40°C to +85°C Operating Temperature
Range