Catalog
37V/ 1A HBLED Driver with High-Side Current Sense
Key Features
• * 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
Description
AI
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.