News & Info
Micrel High Power Boost LED Driver with Integrated FET
Micrel, represented by Soanar in Australia and New Zealand has introduced the MIC3223 constant current boost LED driver. The device is capable of driving a series string of high power LEDs and can be used in general lighting, bulb replacement, garden pathway lighting and other solid state illumination applications.
The MIC3223 is a peak current mode control PWM boost regulator and the 4.5V and 20V operating input voltage range allows multiple applications from a 5V or a 12V bus.
The MIC3223 implements a fixed internal 1MHz switching frequency to allow for a reduction in the design footprint size. Power consumption has been minimized through the implementation of a 200mV feedback voltage that provides an accuracy of ±5%. The MIC3223 can be dimmed through the use of a PWM signal and features an enable pin for a low power shutdown state.
The MIC3223 is a very robust LED driver and offers the following protection features: over voltage protection (OVP), thermal shutdown, switch current limiting and under voltage lockout (UVLO).
Features
- 4.5V to 20V input voltage range
- 200mV feedback voltage with an accuracy of ±5%
- Step-up output voltage (boost) conversion up to 37V
- 1MHz switching frequency
- 100mΩ/3.5A internal power FET switch
- LEDs can be dimmed using a PWM signal
- User settable LED current (through external resistor)
- Externally programmable soft-start
- Available in a 16-pin ePad TSSOP package
MIC3201 & MIC3223 Applications
- Architectural, industrial, and ambient lighting
- LED bulbs
- Indicators and emergency lighting
- Signage
For further information please contact info@soanar.com
