MICROCHIP MIC3203YM-TR

The MIC3203 is a 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 well suited for lighting applications that require 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 comparator 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) that enables a wide range of pulsed dimming. A high-frequency switching operation up to 1.5 MHz allows the use of smaller external components minimizing space and cost. The MIC3203 offers frequency dither feature for EMI control. The MIC3203 operates over a junction temperature from -40°C to +125°C and is available in an 8-pin SOIC package. A dither disabled version MIC3203-1 is also available in the same package as the MIC3203.

• 4.5V 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
• Hysteretic Control (No Compensation)
• Up to 1.5MHz Switching Frequency
• Adjustable Constant LED Current
• Overtemperature Protection
• -40°C to +125°C Junction Temperature Range

• Architectural, Industrial, and Ambient Lighting
• LED Bulbs
• Indicators and Emergency Lighting
• Street Lighting
• Channel Letters
• 12V Lighting Systems (MR-16 Bulbs, Under-Cabinet Lighting, Garden/Pathway Lighting)