MIC3202YME [Microchip]

The MIC3202 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 MIC3202 is 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 MIC3202 offers a dedicated PWM input (DIM) which enables a wide range of pulsed dimming. High-frequency switching operation of up to 1MHz allows the use of smaller external components, minimizing space and cost. The MIC3202 offers a frequency dither feature for low-EMI applications. The MIC3202 operates over a junction temperature from -40°C to +125°C and is available in an 8-pin e-Pad SOIC package. A dither disabled version MIC3202-1 is also available in the same package as the MIC3202.

• 6V to 37V input voltage range
• High efficiency (>90%)
• ±5% LED current accuracy
• MIC3202: Dither enabled for low EMI
• MIC3202-1: Dither disabled
• High-side current sense (up to 1A)
• Dedicated dimming control input
• Hysteretic control (no compensation required)
• Up to 1MHz switching frequency
• Adjustable constant LED current
• Over-temperature protection
• -40°C to +125°C junction temperature range