News & Info
High-Brightness LED Driver Controller with High-Side Current Sense from Micrel
Micrel, represented in Australia and New Zealand by Soanar, has introduced the MlC3203 hysteretic, step-down, constant-current, High-Brightness LED (HB LED) driver. It provides an ideal solution for interior/exterior lighting, architectural and ambient lighting, LED bulbs, and other general illumination applications.
The MIC3203 is claimed to be well suited for lighting applications requiring a wide-input voltage range. The hysteretic control gives good supply rejection and fast response during load transients and PWM dimming. The high-side current sensing and on-chip current-sense amplifier delivers LED current with ±5% accuracy. An external high-side current-sense resistor is used to set the output current.
The MIC3203 offers a dedicated PWM input (DIM) which enables a wide range of pulsed dimming. A high-frequency switching operation up to 1.5MHz allows the use of smaller external components minimizing space and cost.
The MIC3203 offers a frequency dither feature for EMI control.
A dither disabled version MlC3203-1 is also available in the same package as the MlC3203.
Features
- 4.5 to 42V input voltage range
- High efficiency (>90%)
- ±5% LED current accuracy
- MIC3203: Dither enabled for low EMI
- MIC3203-1: Dither disabled
- High-side current sense
- Dedicated dimming control input
- Up to 1.5MHz switching frequency
- Adjustable constant LED current
- Available in a 8-pin SOIC package
Applications
- Architectural, industrial, and ambient lighting
- LED bulbs
- Indicators and emergency lighting, street lighting
- 12V lighting systems (MR-16 bulbs, under-cabinet lighting, garden/pathway lighting)
For further information please contact info@soanar.com
